Earthquake Swarm Detected at Mount Rainier, Biggest Since 2009
WASHINGTON STATE, USA AND TOKARA ISLANDS, KAGOSHIMA PREFECTURE, JAPAN, JUL 8 – More than 1,700 earthquakes struck Japan's Tokara Islands and 400 tremors shook Mount Rainier, raising concerns about volcanic hazards and prompting evacuations, officials said.
- A swarm of over 240 small earthquakes began early Tuesday near Mount Rainier, Washington, marking its largest seismic swarm in nearly 16 years.
- Experts say the swarm stems from fluid circulation along existing faults and matches usual background activity at the active volcano.
- The earthquakes, with a largest magnitude of 2.3 and depths between 1.2 and 3.7 miles, were too small to be felt at the surface and occurred rapidly at times.
- Officials reported that the current earthquake activity does not raise any worries, emphasizing that the volcano alert status remains unchanged and there are no signs suggesting an eruption is imminent.
- Authorities will continue daily monitoring as the swarm likely persists for several days, emphasizing that current activity does not suggest an impending eruption.
47 Articles
47 Articles
‘Larger swarm than anything we’ve seen’: Rainier quakes reach historic levels
“It’s now a larger swarm than anything we’ve seen since we’ve been (seismic) monitoring anything at Mount Rainier,” Alex Iezzi, a research geophysicist, said in an interview Thursday.Researchers started seismic monitoring at Mount Rainier in the 1970s, according to Iezzi, who works for the U.S. Geological Survey’s Cascades Volcano Observatory and said she conferred with other seismologists to identify the origin of observations at the mountain. …
Earthquake swarm continues at Mount Rainier, surpassing 2009 records
PORTLAND, Ore. (KOIN) -- Geologists are continuing to monitor Mount Rainier in Washington state days after the first earthquake swarm in more than 15 years, with this year's earthquake swarm event more powerful than the last one recorded. However, the swarm is starting to decrease in the number of detected earthquakes as of Thursday morning, according to the U.S. Geological Survey's Cascades Volcano Observatory, with 334 earthquakes recorded so …
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