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Monday’s largest quake hit at about 2:08 p.m. at the south tip of the sea, about 8 miles northwest of Calipatria and 25 miles north of El Centro, USGS said. People reported feeling strong shaking at the epicenter and weak movement as far away as San Diego, Cathedral City and El Centro. Swarms are common in the Imperial Valley, and past swarms in the area have stayed active for about a week on average. Those include a 1981 swarm around Westmorland that included a 5.8 magnitude quake, and a 2012 swarm near Brawley that included a magnitude 5.4 temblor. The...

An intense earthquake swarm is taking place near the Salton Sea in Southern California, U.S. on June 5, 2021, starting with M2.2 at 08:05 UTC (01:05 LT). The USGS has registered 285 earthquakes by 21:24 UTC. The swarm is still in progress and new earthquakes are being registered every few minutes, sometimes 2 or 3 within 1 minute. The strongest so far was M5.3 at 17:55 UTC (10:55 LT). The quake struck 11 km (7 miles) W of Calipatria and 11 km N of Westmorland at a depth of 5.8 km (4.6 miles). 3 000 people are estimated to have...

As we reach a total of about 1200 quakes in the last week, the swarm’s activity continues to wane. There has only been one quake over the last 24 hours that was felt – a M3.0 at 1:50am. 21 others were recorded but were too small to be felt. The chances of larger earthquakes in the area are almost back to background levels The USGS has issued their seventh statement and forecast for this swarm. Here’s part of today’s statement: “The following three scenarios describe possibilities of what could happen from 6 October to 13 October. Only one of these...

The desert near the Salton Sea continue to tremble as a swarm of small earthquakes that started Wednesday continued into Thursday. The swarm slowed down Thursday, but at least four earthquakes of magnitude 3 or larger were recorded in the first seven hours of the day, according to the U.S. Geological Survey. The swarm is taking place in the Brawley seismic zone, a predominantly extensional tectonic zone that connects the southern terminus of the San Andreas Fault with the Imperial Fault in Southern California. The area has seen swarms in the past in which they remain active for as many...

The swarm happening now south of the Salton Sea, near Westmoreland is over 30 km south of the end of the San Andreas. It is in the Brawley seismic zone, a common source of swarms. So far largest is M4.4. Too far from the San Andreas to change the probability of a quake on it.

A naturally occurring injection of underground fluids drove a four-year-long earthquake swarm near Cahuilla, California, according to a new seismological study that utilizes advances in earthquake monitoring with a machine-learning algorithm. In contrast to mainshock/aftershock sequences, where a large earthquake is followed by many smaller aftershocks, swarms typically do not have a single standout event. The Cahuilla swarm, as it is known, is a series of small temblors that occurred between 2016 and 2019 near Mt. San Jacinto in Southern California. To better understand what was causing the shaking, Ross and colleagues from Caltech, the United States Geological Survey (USGS),...

The ongoing swarm at Yellowstone National Park is now one of the longest and largest on record. The largest swarm ever recorded was in October 1985; it lasted for three months and included more than 3,000 earthquakes. There was another large swarm in 2010, when more than 2,000 events were recorded over a month. ... As of August 30, 2,357 earthquakes had been recorded. The most powerful in recent weeks was magnitude 3.3; it took place on August 21. The most powerful in the current swarm was a magnitude 4.4, which was recorded on June 15. Yellowstone has had dozens...

More than 800 earthquakes have now been recorded at the Yellowstone Caldera, a long-dormant supervolcano located in Yellowstone National Park, over the last two weeks - an ominous sign that a potentially catastrophic eruption could be brewing. However, despite earthquakes occurring at a frequency unseen during any period in the past five years, the US Geological Survey says the risk level remains in the “green,” unchanged from its normal levels, according to Newsweek. The biggest earthquake in this “swarm” - which registered a magnitude of 4.4 – took place on June 15, three days after the rumblings started. That quake...

A swarm of earthquakes that rattled the Salton Sea area earlier this week has increased the probability of a major quake hitting Southern California. The California Office of Emergency Services (OES) issued an earthquake advisory warning residents and officials in Ventura, San Diego, San Bernardino, Riverside, Orange, Los Angeles, Kern and Imperial counties that there was a greater possibility of a major earthquake through Oct. 4. ... The swarm occurred in a region known as the Brawley seismic zone, which is located near a fault network that connects the southernmost end of the San Andreas fault with the Imperial fault....

San Ramon, California, appears to have broken a new earthquake record over the last two weeks: A total of 408 small quakes have shaken the East Bay city, almost four times the record set in 2003 in half the amount of time. "I've not felt so many tremors in decades," Mark Stone said outside a San Ramon Starbucks on Tuesday morning. "My dog, Gimmel, she's the first one to know a couple of seconds before." The U.S. Geological Survey reports that as of Oct. 13, the Northern California Seismic Network had detected 408 earthquakes – at least a dozen since...

The biggest of the quakes registered magnitude 2.7, and the vast majority were less than magnitude 2.0, so it's unclear whether people felt them. According to a USGS map, the intensity of the 2.7 quake was limited to a fairly small area in rural Ventura County. That quake hit three miles east of Fillmore and six miles west of Santa Paula. On whether these small quakes signal a bigger quake, seismologist Lucy Jones said on Twitter all earthquakes “make another more likely, so probably have more.” But she said there is no way to know if one will be bigger

Mile for mile, there are almost as many earthquakes rattling Oklahoma as California this year. This major increase in seismic shaking led to a rare earthquake warning today (May 5) from the U.S. Geological Survey and the Oklahoma Geological Survey. In a joint statement, the agencies said the risk of a damaging earthquake — one larger than magnitude 5.0 — has significantly increased in central Oklahoma.

Nevada Seismologists are keeping a close eye on an area southwest of Hawthorne, Nevada where hundreds of earthquakes have been detected since Sunday. " It's a little bit concerning in a sense.. The largest earthquakes in these sequences are pretty large in size." Graham Kent is Director of Nevada Seismological Laboratory at the University of Nevada Reno. He says there have been hundreds of earthquakes southwest of Hawthorne over the past few days. The largest-- recorded at a 4.4 in size. "These are the biggest in a sequence we've seen at least in the last couple of years." Kent says...

Submitted at 6:00 pm PDT, September 23, 2004-- Volcanoes in the Cascade Range are all at normal levels of background seismicity. Other volcanoes include,Mount Baker, Glacier Peak, Mount Rainier, Mount Adams, and Mount St. Helens in Washington State; Mount Hood, Mount Jefferson, Three Sisters, Newberry, and Crater Lake, in Oregon; and Medicine Lake, Mount Shasta, and Lassen Peak in northern California. USGS Cascades Volcano Observatory, the Pacific Northwest Seismograph Network at the University of Washington, and the USGS Northern California Seismic Network and Volcano Hazards Team in Menlo Park, California, monitor the major volcanoes in the Cascade Range of northern...

Small earthquakes rattled Mount St. Helens at the rate of one or two a minute Monday, and seismologists were working to determine the significance of some of the most intense seismic activity in nearly 20 years. Carbon dioxide and sulfur gas samples collected above the volcano - which erupted to devastating effect in 1980 - will help scientists figure out what is going on beneath the 925-foot-high dome of hardened lava within the mountain's gaping crater. They want to know whether the quakes are the result of water seeping into the mountain or magma moving under its crater. In either...

I was just reading another thread on this subject, when I came to the line stating that the quake intensity and frequency had diminished on Monday. That it complete eyewash - for whom I don't know. Evidently they don't want to scare the masses - just in case. The thread I'm referring to is located here.Below I'm posting the last three seismographs for you to see that this claim is bogus indeed. This swarm is appearing to grow, with over 1,000 earthquakes so far since Thursday. The depth of the quakes is still near the surface, and they are saying...

The swarm continues beneath Mt. St. Helens again today - it's been a long one indeed. The quakes are growing somewhat in size, with mid to upper 2's on the Richter scale beoming more common. The depths of the quakes is remaining at or near the surface for the most part, yet not all of them in the last two hours have been in the caldera. There is some movement as you can see from the map posted. Below are the current seismograph and the current seismicity map.

I apologize for the vanity post, but there is an earthquake swarm in progress at Mt. St. Helens - several hundred shallow quakes in the last day now. None are large in magnitude, more of the type resulting from movement in the magma. Here is the current seismograph for Mt. St. Helens "Dome Station" which is monitoring the actual lava dome in the caldera: