Tremors Under San Andreas Studied
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The faint tremors, which were detected beneath the town of Cholame, are similar to those discovered in the past two years in Japan and the Pacific Northwest.
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Tuesday nightâs 5.6 magnitude quake near San Francisco set off worries among scientists that the tremor could be a precursor of worse to come.
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PARKFIELD, Calif. The earthquake that rattled nerves throughout Central California yesterday will boost efforts by scientists who are trying to predict future quakes.
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SEATTLE - Seismologists believe there&#39;s an increased likelihood of a &quot;hazardous event&quot; at Mount St. Helens due to recent changes in the mountain&#39;s seismic activity.
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New tremors detected overnight at Mount  St. Helens increased the likelihood that the Washington state  volcano would erupt again, scientists tracking renewed  earthquake activity at the mountain said on Sunday.
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Earthquake activity has increased at Mount St. Helens, but scientists said Saturday there was no reason to raise the volcano's alert level. Scientists said earthquake activity had been low until Friday, indicating molten rock was moving upward with little resistance. By Saturday, however, quakes of magnitude 2.4 were occurring every one to two minutes, they said.
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A well drilled 300 feet deep to study fluctuations in groundwater has proven extremely useful for monitoring major earthquakes around the world.
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VANCOUVER - In recent days minor but continuous earthquakes have been detected near Mount St. Helens, which is located near Vancouver, Washington and in about 55 miles from Portland in Oregon.
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Scientists from the US Geological Survey report that small earthquakes have registered about once a minute for the past several weeks.
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Scientists say there could be more steam eruptions on Mount St. Helens where seismic disturbances readings resumed within hours of Friday&#39;s steam blast on the volcano.
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Earthquake activity began increasing at Mount St. Helens, however overcast skies Saturday impeded scientists&#39; ability to see what was happening at the volcano.
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Volcanic tremors and earthquakes emanating from Mt. Asama, which straddles Gunma and Nagano prefectures in east Japan, subsided Thursday after the volcano erupted Wednesday night, the Japan Meteorological Agency said.
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More steam gushed out of Mount St. Helens following an increase in earthquake activity, keeping scientists guessing as to what is happening deep within the volcano and perhaps showing that the mountain's seismic activity may not be over yet.
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MOUNT ST. HELENS NATIONAL MONUMENT, Wash. A seismologist says he can&#39;t decipher the meaning of the latest activity on Mount St.
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Scientists believe they have tracked down the origin of a low-frequency "hum" that emanates from the Earth.
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Continuous tremors rocked Mount St. Helens for 90 minutes overnight, geologists reported Monday, and that sustained activity foretells what could be a volcanic eruption within the next few minutes or months.
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ARVIN, Calif. -- Earthquakes on two separate faults rattled Central California a day after a 6.0-quake jolted the region. No major damage or injuries were reported.