All articles tagged with #earthquake swarm
A weekend seismic swarm near Brawley in Imperial County produced more than 350 quakes, including a 4.7-magnitude event, but activity is slowing with no major damage or injuries reported; authorities are monitoring the situation.
A series of at least six earthquakes, including a magnitude 4.0 quake, struck the San Ramon area on Friday night, causing local alarm but no damage. The seismic activity is part of a larger swarm that has been ongoing for days, with experts noting that such swarms are usually not indicative of an imminent larger quake and are often caused by fluid interactions or slow fault slipping.
A volcanic eruption occurred on July 16 in Iceland's Sundhnúkur crater row following an earthquake swarm, with lava erupting from a large fissure and spreading to a second, while authorities monitor gas pollution and environmental impact; the eruption is ongoing but poses no immediate threat to infrastructure.
Iceland has declared a state of emergency and evacuated the coastal town of Grindavik due to intense earthquake activity, raising concerns about a potential volcanic eruption. The Icelandic Meteorological Office recorded nearly 800 quakes in 14 hours, with authorities warning that the earthquakes could lead to an eruption. The village of Grindavik, located near the epicenter, has evacuation plans in place. The US Embassy issued a volcano alert, urging people to follow instructions from Icelandic authorities. Iceland, home to 33 active volcanoes, has experienced thousands of tremors in recent weeks.
An earthquake swarm with a 3.5 temblor followed by aftershocks rattled under Pacifica, California, early Tuesday. The quake was felt strongly in San Francisco and on the Peninsula all the way to Santa Cruz. There were no immediate reports of damage or injuries. The USGS researcher Keith Knudsen said the quake had some unique characteristics and they will be investigating.
A series of small earthquakes, including an initial 3.5 magnitude quake and two aftershocks, jolted residents in northern California's Bay Area on Tuesday morning. The earthquakes were felt from Santa Cruz to San Francisco, but there were no reports of damage or injuries. The quakes occurred as strong winds and heavy showers impact the region, which has also seen heavy snow and strong rain in recent weeks.