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Earthquake Swarm Yellowstone

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Earthquake Swarm Yellowstone

Postby Mollypup » Fri Jun 16, 2017 9:39 pm

MAMMOTH HOT SPRINGS, Wyo. (AP) — A swarm of earthquakes in the northwestern part of Yellowstone National Park this week continued into Friday and was punctuated with a magnitude 4.4 quake Thursday evening.

The U.S. Geological Survey says the quake occurred at 6:48 p.m., in a backcountry area of Yellowstone National Park, about 8 miles (12.8 kilometers) northeast of West Yellowstone, Montana. The swarm of about 30 earthquakes of magnitude 2 and larger began Monday.

The West Yellowstone Police Department says the earthquake was felt in the town that borders the park, but there were no reports of damage.

http://www.seattletimes.com/nation-worl ... ake-swarm/

The small earthquake that struck Yellowstone National Park on Thursday night was part of a swarm that has been hitting the area since Monday, scientists say.

The quake was centered near West Yellowstone, but was also felt by people in Gardiner and Bozeman.

“As of 10 a.m. this morning we had located a total of 235 earthquakes in the area,” said Jamie Farrell, University of Utah research professor of seismology.

Yellowstone gets about 1,500 to 2,000 earthquakes every year. About half of those come in earthquake swarms — lots of earthquakes in a small area in a short amount of time.

So this activity is fairly normal, Farrell said.

Most of the earthquakes in this swarm have been small — only four above magnitude 3. Thursday’s 4.5 magnitude earthquake was the only one reported to the U.S. Geological Survey website, meaning people actually felt it.

Not only was Thursday’s quake the largest in the current swarm, it was the largest in the area since March 30, 2014, when a 4.8 magnitude earthquake hit near Norris Geyser Basin, according to a news release from the University of Utah Seismograph Station.

Farrell said the swarm is the effect of normal tectonic stress in the Earth’s crust. As of Friday morning, his the University of Utah seismologists weren’t seeing anything volcanic in nature. Yellowstone National Park is home to a large volcano and the site of the largest and most diverse collection of natural thermal features in the world.

It’s impossible to predict when this current earthquake storm will end.

“These things could turn off in a heartbeat, or could last for months. Most go for a week or two,” Farrell said.

Farrell urges people to report any activity they feel to the USGS’s “Did you feel it” website, which help scientists record and understand shaking. People can also watch earthquake activity live at www.quake.utah.edu.

http://www.bozemandailychronicle.com/ne ... e3f5f.html

I know that earthquakes are common around Yellowstone. However, this caught my eye & I thought I'd post. It's a bit unusual for swarms to be news worthy since they are a common thing in the area.
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Re: Earthquake Swarm Yellowstone

Postby DR1VENbyKNOWLEDGE » Mon Jun 19, 2017 4:16 pm

USGS just sent me this alert...We've seen this before but a change in monitor status is something to just watch...no worries yet. ;)

U.S. Geological Survey
Monday, June 19, 2017, 3:09 PM MDT (Monday, June 19, 2017, 21:09 UTC)

44°25'48" N 110°40'12" W, Summit Elevation 9203 ft (2805 m)
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN

The University of Utah, a YVO member agency, sent out the following update about the ongoing earthquake swarm north of West Yellowstone.

The University of Utah Seismograph Stations (UUSS) is monitoring an earthquake swarm which is currently active on the western edge of Yellowstone National Park. The swarm began on June 12th, 2017 and, as of 13:30 MDT on June 19th, 2017, is composed of 464 events with the largest magnitude of ML 4.4 (MW 4.4) (Figure 1). The swarm consists of one earthquake in the magnitude 4 range, 5 earthquakes in the magnitude 3 range, 57 earthquakes in the magnitude 2 range, 238 earthquakes in the magnitude 1 range, 157 earthquakes in the magnitude 0 range, and 6 earthquakes with magnitudes of less than zero. These events have depths from ~0.0 km to ~14.5 km, relative to sea level. At the time of this report, there were 115 felt reports for the M4.4 event that occurred on June 16, 2017 at 00:48:46.94 UTC (June 15, 2017 at 18:48:46.94 MDT). The M4.4 event has an oblique strike-slip moment tensor solution (Figures 1 & 2).

Earthquake swarms are common in Yellowstone and, on average, comprise about 50% of the total seismicity in the Yellowstone region.

Related figures can be viewed on the original post: http://quake.utah.edu/research/special- ... owstone-mt

This is the highest number of earthquakes at Yellowstone within a single week in the past five years, but is fewer than weekly counts during similar earthquakes swarms in 2002, 2004, 2008 and 2010.

The Yellowstone Volcano Observatory (YVO) provides long-term monitoring of volcanic and earthquake activity in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.

YVO Member agencies: USGS, Yellowstone National Park, University of Utah, University of Wyoming, UNAVCO, Inc., Wyoming State Geological Survey, Montana Bureau of Mines and Geology, Idaho Geological Survey


Jacob Lowenstern, Scientist-in-Charge
In honor of RebNavy...RIP buddy. You made me smile. :)

Postby rebnavy1862 » Fri Apr 07, 2017 4:00 pm
Driven, are you sure you are from Kalifornia? You make a lot of sense.
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