Earthquake Data and Links

Here are links to Earth Geology, Earthquakes and Volcanoes. There is ample information on this page, with Links, that can provide enough material to prove, that GOD will use the Earth to fulfill the Bible Prophesies of the Great Tribulation Period.
Some of these Links may still work and some may not!!!

 

URL for CVO HomePage is: <http://vulcan.wr.usgs.gov/home.html>
URL for this page is: <http://vulcan.wr.usgs.gov/Glossary/Seismicity/framework.html>
If you have questions or comments please contact: <GS-CVO-WEB@usgs.gov>
04/27/07, Lyn Topinka

Hazards and Features Menus
URL for CVO HomePage is: <http://vulcan.wr.usgs.gov/home.html>
URL for this page is: <http://vulcan.wr.usgs.gov/Glossary/framework.html>
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01/30/03, Lyn Topinka
Accelerograph:

  • A seismograph whose output is proportional to ground acceleration (in comparison to the usual seismograph whose output is proportional to ground velocity). Accelerographs are typically used as instruments designed to record very strong ground motion useful in engineering design; seismographs commonly record off scale in these circumstances. Normally, strong motion instruments do not record unless triggered by strong ground motion.(Noson, et.al., 1988)
Aftershock:

  • One of many earthquakes that often occur during the days to months after some larger earthquake (mainshock) has occurred. Aftershocks occur in the same general region as the mainshock and are believed to be the result of minor readjustments of stress at places in the fault zone.(Noson, et.al., 1988)
  • An earthquake which follows a larger earthquake or main shock and originates in or near the rupture zone of the larger earthquake. Generally, major earthquakes are followed by a larger number of aftershocks, decreasing in frequency with time.(USGS National Earthquake Information Center, 1999)
Amplitude:

  • The amplitude of a seismic wave is the amount the ground moves as the wave passes by. (As an illustration, the amplitude of an ocean wave is one-half the distance between the peak and trough of the wave. The amplitude of a seismic wave can be measured from the signal recorded on a seismogram.)(Noson, et.al., 1988)
  • The maximum height of a wave crest of depth of a trough.(USGS National Earthquake Information Center, 1999)
Broad Band Seismic Station:

Crust:

  • The Earth’s outermost layer.(Teacher’s Packet)
Deep Earthquakes:

  • …deep earthquakes and those located away from the volcano, which produce high-frequency signatures and sharp arrivals similar to tectonic earthquakes(Brantley and Topinka, 1984)
Earthquake:

  • Shaking of the Earth caused by a sudden movement of rock beneath its surface.(USGS National Earthquake Information Center, 1999)
  • The release of stored elastic energy caused by sudden fracture and movement of rocks inside the Earth. Part of the energy released produces seismic waves, like P, S, and surface waves, that travel outward in all directions from the point of initial rupture. These waves shake the ground as they pass by. An earthquake is felt if the shaking is strong enough to cause ground accelerations exceeding approximately 1.0 centimeter/second squared.(Noson, et.al., 1988)
Earthquake swarm:

  • A series of minor earthquakes, none of which may be identified as the main shock, occurring in a limited area and time.(USGS National Earthquake Information Center, 1999)
Epicenter:

  • That point on the Earth’s surface directly above the hypocenter of an earthquake.(USGS National Earthquake Information Center, 1999)
  • The location on the surface of the Earth directly above the focus, or place where an earthquake originates. An earthquake caused by a fault that offsets features on the Earth’s surface may have an epicenter that does not lie on the trace of that fault on the surface. This occurs if the fault plane is not vertical and the earthquake occurs below the Earth’s surface.(Noson, et.al., 1988)
Fault:

  • A break in the Earth along which movement occurs. Sudden movement along a fault produces earthquakes. Slow movement produces aseismic creep.(Noson, et.al., 1988)
Focus:

  • That point within the Earth from which originates the first motion of an earthquake and its elastic waves.(USGS National Earthquake Information Center, 1999)
Foreshock:

  • A small tremor that commonly precedes a larger earthquake or main shock by seconds to weeks and that originates in or near the rupture zone of the larger earthquake.(USGS National Earthquake Information Center, 1999)
Harmonic tremor:

  • Continuous rhythmic earthquakes in the Earth’s upper lithosphere that can be detected by seimographs. Harmonic tremors often precede or accompany volcanic eruptions.(Teacher’s Packet)
  • A continuous release of seismic energy typically associated with the underground movement of magma. It contrasts distinctly with the sudden release and rapid decrease of seismic energy associated with the more common type of earthquake caused by slippage along a fault.(Foxworthy and Hill, 1982)
  • … harmonic tremor, which is a long-lasting, very rhythmic signal whose origin is not well understood but which is often associated with active volcanoes …(Brantley and Topinka, 1984)
Hypocenter:

  • The calculated location of the focus of an earthquake.(USGS National Earthquake Information Center, 1999)
Intensity:

  • A measure of severity of shaking at a particular site. It is usually estimated from descriptions of damage to buildings and terrain. The intensity is often greatest near the earthquake epicenter. Today, the Modified Mercalli Scale is commonly used to rank the intensity from I to XII according to the kind and amount of damage produced. Before 1931 earthquake intensities were often reported using the Rossi-Forel scale. (Noson, et.al., 1988)
  • A measure of the effects of an earthquake at a particular place on humans, structures and (or) the land itself. The intensity at a point depends not only upon the strength of the earthquake (magnitude) but also upon the distance from the earthquake to the opint and the local geology at that point.(USGS National Earthquake Information Center, 1999)
Intensity scale:

  • The effect of an earthquake on the Earth’s surface is called the intensity. The intensity scale consists of a series of certain key responses such as people awakening, movement of furniture, damage to chimneys, and finally – total destruction. Although numerous intensity scales have been developed over the last several hundred years to evaluate the effects of earthquakes, the one currently used in the United States is the Modified Mercalli (MM) Intensity Scale.(USGS National Earthquake Information Center, 1999)
Lg wave:

  • A surface wave which travels through the continental crust.(USGS National Earthquake Information Center, 1999)
Long-period earthquakes:

  • … low-frequency earthquakes (called long-period or volcanic), which reflect adjustments related to the exit of magma from the summit reservoir to feed the eruption … (Tilling, et.al., 1987)
Love wave:

  • A major type of surface wave having a horizontal motion that is shear or transverse to the direction of propagation (travel). It is named after A.E.H. Love, the English mathematician who discovered it.(USGS National Earthquake Information Center, 1999)
Magnitude:

  • A quantity characteristic of the total energy released by an earthquake, as contrasted with intensity, which describes its effects at a particular place. A number of earthquake magnitude scales exist, including local (or Richter) magnitude, body wave magnitude, surface wave magnitude, moment magnitude, and coda magnitude. As a general rule, an increase of one magnitude unit corresponds to ten times greater ground motion, an increase of two magnitude units corresponds to 100 times greater ground motion, and so on in a logarithmic series. Commonly, earthquakes are recorded with magnitudes from 0 to 8, although occasionally large ones (M=9) and very small ones (M= -1 or -2) are also recorded. Nearby earthquakes with magnitudes as small as 2 to 3 are frequently felt. The actual ground motion for, say, a magnitude 5 earthquake is about 0.04 millimeters at a distance of 100 kilometers from the epicenter; it is 1.1 millimeters at a distance of 10 kilometers from the epicenter.(Noson, et.al., 1988)
  • A numerical expression of the amount of energy released by an earthquake, determined by measuring earthquake waves on standardized recording instruments (seismographs). The number scale for magnitudes is logarithmic rather than arithmetic; therefore, deflections on a seismograph for a magnitude 5 earthquake, for example, are 10 times greater than those for a magnitude 4 earthquake, 100 times greater than for a magnitude 3 earthquake, and so on.(Foxworthy and Hill, 1982)
Mainshock:

  • The largest in a series of earthquakes occurring closely in time and space. The mainshock may be preceded by foreshocks or followed by aftershocks.(Noson, et.al., 1988)
Mantle:

  • A zone in the Earth’s interior between the crust and the core that is 2,900 kilometers (1,740 miles) thick. (The lithosphere is composed of the topmost 65-70 kilometers (39-42 miles) of mantle and the crust).(Teacher’s Packet)
Microearthquakes:

  • Earthquakes with magnitude of about 2.0 or less are usually call microearthquakes; they are not commonly felt by people and are generally recorded only on local seismographs. (USGS National Earthquake Information Center, 1998)
Modified Mercalli Intensity Scale:

  • The effect of an earthquake on the Earth’s surface is called the intensity. The intensity scale consists of a series of certain key responses such as people awakening, movement of furniture, damage to chimneys, and finally – total destruction. Although numerous intensity scales have been developed over the last several hundred years to evaluate the effects of earthquakes, the one currently used in the United States is the Modified Mercalli (MM) Intensity Scale. It was developed in 1931 by the American seismologists Harry Wood and Frank Neumann. This scale, composed of 12 increasing levels of intensity that range from imperceptible shaking to catastrophic destruction, is designated by Roman numerals. It does not have a mathematical basis; instead it is an arbitrary ranking based on observed effects. (USGS National Earthquake Information Center, 1998)
P (Primary) waves:

  • Also called compressional or longitudinal waves, P waves are the fastest seismic waves produced by an earthquake. They oscillate the ground back and forth along the direction of wave travel, in much the same way as sound waves, which are also compressional, move the air back and forth as the waves travel from the sound source to a sound receiver. (USGS National Earthquake Information Center, 1998)
Plates:

  • Pieces of crust and brittle uppermost mantle, perhpas 100 kilometers thick and hundres or thousands of kilometers wide, that cover the Earth’s surface. The plates move very slowly over, or possibly with, a viscous layer in the mantle at rates of a few centimeters per year.(Noson, et.al., 1988)
Plate tectonics:

  • A widely accepted theory that relates most of the geologic features near the Earth’s surface to the movement and interaction of relatively thin rock plates. The theory predicts that most earthquakes occur when plates move past each other.(Noson, et.al., 1988)
Rayleigh wave:

  • A type of surface wave having a retrograde, elliptical motion at the Earth’s surface, similar to the waves caused when a stone is dropped into a pond. These are the slowest, but often the largest and most destructive, of the wave types caused by an earthquake. They are usually felt as a rolling or rocking motion and in the case of major earthquakes, can be seen as they approach. Named after Lord Rayleigh, the English physicist who predicted its existence.(USGS National Earthquake Information Center, 1999)
Richter Magnitude Scale

  • The Richter magnitude scale was developed in 1935 by Charles F. Richter of the California Institute of Technology as a mathematical device to compare the size of earthquakes. The magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs. Adjustments are included for the variation in the distance between the various seismographs and the epicenter of the earthquakes. On the Richter Scale, magnitude is expressed in whole numbers and decimal fractions. For example, a magnitude 5.3 might be computed for a moderate earthquake, and a strong earthquake might be rated as magnitude 6.3. Because of the logarithmic basis of the scale, each whole number increase in magnitude represents a tenfold increase in measured amplitude; as an estimate of energy, each whole number step in the magnitude scale corresponds to the release of about 31 times more energy than the amount associated with the preceding whole number value. (USGS National Earthquake Information Center, 1998)
S (Secondary or shear) waves:

  • S waves oscillate the ground perpendicular to the direction of wave travel. They travel about 1.7 times slower than P waves. Because liquids will not sustain shear stresses, S waves will not travel through liquids like water, molten rock, or the Earth’s outer core. (USGS National Earthquake Information Center, 1998)
Seiche:

  • A standing wave in a closed body of water such as a lake or bay. It can be characterized as the sloshing of water in the enclosing basin. Seiches can be produced by seismic waves from earthquakes. The permanent tilting of lake basins caused by nearby fault motions has produced very entergetic seiches.(Noson, et.al., 1988)
Seismicity:

  • Earthquake activity.(USGS National Earthquake Information Center, 1999)
Seismic waves:

  • A vibrational disturbance in the Earth that travels at speeds of several kilometers per second. There are three main types of seismic waves in the earth: P (fastest), S (slower), and Surface waves (slowest). Seismic waves are produced by earthquakes.(Noson, et.al., 1988)
  • Seismic waves are the vibrations from earthquakes that travel through the Earth; they are recorded on instruments called seismographs. (USGS National Earthquake Information Center, 1998)
Seismogram:

  • A graph showing the motion of the ground versus time.(Noson, et.al., 1988)
  • A written record of an earthquake, recorded by a seismograph.(USGS National Earthquake Information Center, 1999)
Seismograph:

  • A sensitive instrument that can detect, amplify, and record ground vibrations too small to be perceived by human beings.(Noson, et.al., 1988)
  • An instrument that records the motions of the Earth, especially earthquakes.(USGS National Earthquake Information Center, 1999)
  • A scientific instrument that detects and records vibrations (seismic waves) produced by earthquakes.(Teacher’s Packet)
Seismograph station:

  • A site at which one or more seismographs are set up and routinely monitored.(USGS National Earthquake Information Center, 1999)
Seismologist:

  • A scientist who studies earthquakes.(USGS National Earthquake Information Center, 1999)
Seismometry:

  • The instrumental aspects of seismology.(USGS National Earthquake Information Center, 1999)
Shallow earthquakes:

  • … shallow earthquakes, located under the dome at depths of less than 3 kilomenters, which produce medium-to low-frequency seismic arriavals …(Brantley and Topinka, 1984)
Short-period earthquakes:

  • … During inflation the rocks surrounding the (magma) reservoir become stressed, and this stress is partly relieved by increasing numbers of earthquakes, too small to be felt, but easily recorded by seismometers at Kilauea (Hawaii) summit. These earthquakes (called short-period or tectonic) are recorded as high-frequency features on a seismograph …(Tilling, et.al., 1987)
Short Period Seismic Station:

Strong Motion Seismic Station:

Spreading center:

  • An elongated region where two plates are being pulled away from each other. New crust is formed as molten rock is forced upward into the gap. Examples of spreading centers include the Mid-Atlantic Ridge and the East African Rift.(USGS National Earthquake Information Center, 1999)
Subduction zone:

  • The place where two lithosphere plates come together, one riding over the other. Most volcanoes on land occur parallel to and inland from the boundary between the two plates.(Teacher’s Packet)
Subduction zone boundary:

  • The region between converging plates, one of which dives beneath the other. The Cascadia subduction zone boundary is an example.(Noson, et.al., 1988)
Surface events:

  • … surface events, such as gas and tephra events, rockfalls associated with dome growth, and snow and rock avalanches from the crater walls, which produce complicated signatures with no clear beginning or end …(Brantley and Topinka, 1984)
Surface waves:

  • Waves that move over the surface of the Earth. Rayleigh waves and Love waves are surface waves.(USGS National Earthquake Information Center, 1999)
  • Seismic waves, slower than P or S waves, that propagate along the Earth’s surface rather than through the deep interior. Two principal types of surface waves, Love and Rayleigh waves, are generated during an earthquakes. Rayleigh waves cause both vertical and horizontal ground motion, and Love waves cause horizontal motion only. They both produce ground shaking at the Earth’s surface but very little motion deep in the Earth. Because the amplitude of surface waves diminishes less rapidly with distance than the amplitude of P or S waves, surface waves are often the most important component of ground shaking far from the earthquake source. (USGS National Earthquake Information Center, 1999)
Tectonic:

  • Pertaining to the forces involved in the deformation of the Earth’s crust, or the structures or features produced by such deformation.
Tectonic earthquakes:

  • Although all earthquakes associated with active volcanoes are ultimately related to volcanic processes,Volcanic earthquakes are directly associated with magma movement, whiletectonic earthquakes occur in zones separated from the principal areas of magma movement. (Heliker, et.al., 1986)
Tremor:

  • See: Harmonic tremor.
Tsunami:

  • A tsunami is a series of very long wavelength ocean waves caused by the sudden displacement of water by earthquakes, landslides, or submarine slumps. Ordinarily, tsunamis are produced only by earthquakes exceeding magnitude 7.5. In the open ocean, tsunami waves travel at speeds of 600-800 kilometers per hour, but their wave heights are usually only a few centimeters. As they approach shallow water near a coast, tsunami waves travel more slowly, but their wave heights may increase to many meters, and thus they can become very destructive.(Noson, et.al., 1988)
  • Tsunamis are large, rapidly moving ocean waves triggered by a major disturbance of the ocean floor, which is usually caused by an earthquake but sometimes can be produced by a submarine landslide or a volcanic eruption.(Heliker, 1990)
  • Damaging earthquakes and sea waves (tsunami) may also be closely realted to volcanoes and volcanic activity. Large earthquakes related to intrusion of magma into Hawaii’s active rift zones of Mauna Loa and Kilauea have caused extensive damage on land and also triggered tsunami in 1868 and 1975 that devastated low-lying coastal areas. Large landslides from Alaskan volcanoes near the sea have also genereated tsunami that destroyed coastal villages.(Wright and Pierson, 1992)
  • Major earthquakes occurring along subduction zones are especially hazardous, because they can trigger tsunami (from the Japanese word tsunami meaning “harbor wave”) and pose a potential danger to coastal communities and islands that dot the Pacific. … tsunamis are seismic sea waves caused by earthquakes, submarine landslides, and, infrequently, by eruptions of island volcanoes. During a mojor earthquake, the seafloor can move by several meters and an enormous amount of water is suddenly set into motion, sloshing back and forth for several hours. Thes result is a series of waves that race across the ocean at speeds of more than 800 kilometers per hour, comparable to those of commercial jetliners. The energy and momentum of these transoceanic waves can take them thousands of kilometers from their origin before slamming into far-distant islands or coastal areas. … The 1883 eruption of Krakatau Volcano, located in the Sunda Straits between the islands of Sumatra and Java, Indonesia, provides an excellent example of an eruption-caused tsunami. A series of tsunamis washed away 165 coastal villages on Java and Sumatra, killing 36,000 people … (Kious and Tilling, 1996)
Volcanic earthquakes:

  • Although all earthquakes associated with active volcanoes are ultimately related to volcanic processes,Volcanic earthquakes are directly associated with magma movement, whiletectonic earthquakes occur in zones separated from the principal areas of magma movement. (Heliker, et.al., 1986)
Volcanic tremor:

  • See: Harmonic tremor

References:

URL for CVO HomePage is: <http://vulcan.wr.usgs.gov/home.html>
URL for this page is: <http://vulcan.wr.usgs.gov/Glossary/earthquake_terminology.html>
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02/22/00, Lyn Topinka

    Historic World Earthquakes

                                              
U.S. Department of the Interior | U.S. Geological Survey
Page URL: http://earthquake.usgs.gov/earthquakes/world/historical.php
Page Contact Information: EHP Web Team
Page Last Modified: March 29, 2010 18:24:21 UTC
 
URL for CVO HomePage is: <http://vulcan.wr.usgs.gov/home.html>
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08/18/03, Lyn Topinka

Articles for individual plates

Paleaocontinents

Other articles relating to specific locations

Earthquakes

Other plate tectonics articles

Tectonic plate interactions are of three different basic types:

  • Divergent boundaries are areas where plates move away from each other, forming either mid-oceanic ridges or rift valleys.
  • Convergent boundaries are areas where plates move toward each other and collide. These are also known as compressional or destructive boundaries.
    • Subduction zones occur where an oceanic plate meets a continental plate and is pushed underneath it. Subduction zones are marked by oceanic trenches. The descending end of the oceanic plate melts and creates pressure in the mantle, causing volcanoes to form.
    • Obduction occurs when the continental plate is pushed under the oceanic plate, but this is unusual as the relative densities of the tectonic plates favours subduction of the oceanic plate. This causes the oceanic plate to buckle and usually results in a new mid ocean ridge forming and turning the obduction into subduction
    • Orogenic belts occur where two continental plates collide and push upwards to form large mountain ranges.
  • Transform boundaries occur when two plates grind past each other with only limited convergent or divergent activity.

Divergent boundaries

Subduction zones

Orogenic belts

Transform boundaries

From:   http://en.wikipedia.org/wiki/List_of_tectonic_plate_interactions

The Cascades extend from Lassen Peak (also known as Mount Lassen) (3170 m) in northern California to Lytton Mountain (2,049 m) in Canada, just southeast of the confluence of the Fraser and Thompson Rivers. The tallest volcanoes of the Cascades are called the High Cascades and dominate their surroundings, often standing twice the height of the nearby mountains. They often have a visual height (height above nearby crestlines) of one mile (1.6 km) or more. The tallest peaks, such as the 14,411 foot (4,395 m) high Mount Rainier, dominate their surroundings for 50 to 100 miles (80 to 160 km).The northern part of the range, north of Mount Rainier, is known as the North Cascades in the United States but is formally named the Cascade Mountains north of the Canada – United States border, reaching to the northern extremity of the Cascades at Lytton Mountain. Overall, the North Cascades and southwestern Canadian Cascades are extremely rugged, with many of the lesser peaks steep and glaciated, with valleys quite low relative to its peaks and ridges, resulting in great local relief, and major passes are only about 1,000 m (3,300 ft) high. The southern part of the Canadian Cascades, particularly the Skagit Range, are geologically and topographically similar to the North Cascades, while the northern and northeastern parts – the Coquihalla Range, the name of which is unofficial,[citation needed], the northern half of the Hozameen Range and most of the Okanagan Range are less glaciated and more plateau-like in character, resembling nearby areas of the Thompson Plateau.

Because of the range’s proximity to the Pacific Ocean, precipitation is substantial, especially on the western slopes, with annual accumulations of up to 150 inches (3,800 mm) in some areas—Mount Baker, for instance, recorded the largest single-season snowfall on record in the world in 1999—and heavy snowfall as low as 2,000 feet (600 m). It is not uncommon for some places in the Cascades to have over 200 inches (5,500 mm) of snow accumulation, such as at Lake Helen (near Lassen Peak), one of the snowiest places in the world. Most of the High Cascades are therefore white with snow and ice year-round. The western slopes are densely covered with Douglas-fir, Western Hemlock and Red alder, while the drier eastern slopes are mostly Ponderosa Pine, with Western Larch at higher elevations. Annual rainfall drops to 9 inches (200 mm) on the eastern foothills due to a rainshadow effect.

Beyond the foothills is an arid plateau that was created 16 million years ago as a coalescing series of layered flood basalt flows. Together, these sequences of fluid volcanic rock form a 200,000 square mile (520,000 km2) region out of eastern Washington, Oregon, and parts of Northern California and Idaho called the Columbia River Plateau.

The Columbia River Gorge is the only major break in the American part of the Cascades. When the Cascades started to rise 7 million years ago in the Pliocene, the Columbia River drained the relatively low Columbia River Plateau. As the range grew, the Columbia was able to keep pace, creating the gorge and major pass seen today. The gorge also exposes uplifted and warped layers of basalt from the plateau.

North Cascades

  • Coquihalla Mountain (southern British Columbia) — highest peak in the Bedded Range.
  • Mount Baker (Near the United States–Canada border) — highest peak in northern Washington. It is an active volcano[5]. Steam activity from its crater occurs relatively frequently. Mount Baker is one of the snowiest places on Earth; in 1999 the ski area (on a subsidiary peak) recorded the world’s greatest single-season snowfall: 1,140 inches (95 feet or 2,896 cm).
  • Glacier Peak (northern Washington) — secluded and relatively inaccessible peak. Contrary to its name, its glacial cover isn’t that extensive. The volcano is surprisingly small in volume, and gets most of its height by having grown atop a nonvolcanic ridge.

High Cascades

  • Mount Rainier (southeast of Tacoma, Washington) — highest peak in the Cascades, it dominates the surrounding landscape. There is no other higher peak northward until the Yukon-Alaska-BC border apex beyond the Alsek River.
  • Mount St. Helens (southern Washington) — Erupted in 1980, leveling forests to the north of the mountain and sending ash across the northwest. The northern part of the mountain was destroyed in the blast (1980 Mount St. Helens eruption).
  • Mount Adams (east of Mount St. Helens) — the second highest peak in Washington and third highest in the Cascade Range.
  • Mount Hood (northern Oregon) — the highest peak in Oregon and arguably the most frequently climbed major peak in the Cascades.
  • Mount Jefferson (northcentral Oregon) — the second highest peak in Oregon.
  • Three Fingered Jack (northcentral Oregon) — Highly eroded Pleistocene volcano.
  • Mount Washington (between Santiam and McKenzie passes) — a highly eroded shield volcano. [2]
  • Three Sisters (near the city of Bend, Oregon) — South Sister is the highest and youngest, with a well defined crater. Middle Sister is more pyramidal and eroded. North Sister is the oldest and has a crumbling rock pinnacle.
  • Broken Top (to the southeast of South Sister) — a highly eroded extinct stratovolcano. Contains Bend Glacier.
  • Newberry Volcano — isolated caldera with two crater lakes. Very variable lavas. Flows from here have reached the city of Bend.
  • Mount Bachelor (near Three Sisters) — a geologically young (less than 15,000 years) shield-to-stratovolcano which is now the site of a popular ski resort. (Mt. Bachelor ski area)
  • Diamond Peak (south of Willamette Pass)  — a 8,744 feet (2,665 m) volcano composed of 15 cubic kilometres (3.6 cu mi) of basaltic andesite.
  • Mount Bailey (north of Mount Mazama)
  • Mount Thielsen (east of Mount Bailey) — highly eroded volcano with a prominent spire, making it the Lightning Rod of the Cascades.
  • Mount Mazama (southern Oregon) — better known for its Crater Lake, which is a caldera formed by a catastrophic eruption which took out most of the summit roughly 6,900 years ago. Mount Mazama is estimated to have been about 11,000 ft. (3,350 m) elevation prior to the blast.
  • Mount Scott (southern Oregon) — on the southeastern flank of Crater Lake. At 8,929 feet (2,721 m) elevation, this small stratovolcano is the highest peak in Crater Lake National Park.
  • Mount McLoughlin (near Klamath Falls, Oregon) — presents a symmetrical appearance when viewed from Klamath Lake.
  • Medicine Lake Volcano — a shield volcano in northern California which is the largest volcano by volume in the Cascades.
  • Mount Shasta (northern California) — second highest peak in the Cascades. Can be seen in the Sacramento Valley as far as 140 miles (225 km) away, as it is a dominating feature of the region.
  • Lassen Peak (south of Mount Shasta) — southernmost volcano in the Cascades and the most easily climbed peak in the Cascades. It erupted from 1914 to 1921, and like Mount Shasta, it too can be seen in the Sacramento Valley, up to 120 miles (193 km) away. Lowest Peak because the Cascades extend from it.

From:   http://en.wikipedia.org/wiki/Cascade_Range