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Date: June 17, 2023 at 07:30:12
From: Eve, [DNS_Address]
Subject: M 2.6 - 2 km N of Pembroke, Virginia |
URL: https://earthquake.usgs.gov/earthquakes/eventpage/se60500853/executive |
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M 2.6 - 2 km N of Pembroke, Virginia
2023-06-17 01:31:38 (UTC)
37.341°N 80.644°W
9.5 km depth
https://earthquake.usgs.gov/earthquakes/eventpage/se60500853/executive
https://earthquaketrack.com/p/united-states/virginia/recent
https://www.volcanodiscovery.com/earthquakes/quake-info/7685368/quake-felt-Jun-17-2023-Near-Blacksburg-Virginia-USA.html
https://www.youtube.com/watch?v=zKvKxtMF-Kk
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(history, eq in W.VA. 2.6 Feb. 2023):
When was West Virginia’s biggest earthquake?
by: Sam Kirk
Posted: Feb 20, 2023 / 04:53 PM EST
Updated: Feb 20, 2023 / 04:53 PM EST
CLARKSBURG, W.Va. (WBOY) — You don’t normally hear much about earthquakes in West Virginia, since most of the state is nowhere near a fault line. However, a 2.6-magnitude earthquake was recorded near Point Pleasant over
the weekend, and as another massive 6.4 magnitude quake hit Turkey on Monday, you might be wondering what the odds are that you could feel one from your West Virginia home.
According to the United States Geological Survey (USGS) Quaternary Faults map, the only area of a fault line in West Virginia is a small section of Class B fault area in the counties of Mercer, Summers and Monroe.
New quake hits battered Turkey, Syria; 3 dead, hundreds hurt
According to the USGS’s West Virginia earthquakes map, most of the reported quakes in West Virginia were actually ground-shaking explosions. While West Virginia has had earthquakes as large as a 4.7 magnitude near Welch
in 1976, according to Earthquake Track, most quakes in the state are small and cause little or no damage, like the one near Point Pleasant on Friday.
In roughly the past year, there have been three earthquakes in West Virginia:
- 2.6 magnitude near Point Pleasant (Mason County) last week
- 2.0 magnitude near Marlinton (Pocahontas County) in August 2022
- 1.9 magnitude near Union (Monroe County) in December 2021
In a 2019 interview after a quake near Beckley, then West Virginia University professor of Geology Jaime Toro said that many of West Virginia’s earthquakes, including a series of quakes in Braxton County in the 2010s, are
not naturally occurring.
NWS map: Parts of West Virginia seeing 4 feet less snow than normal
In the 2019 WVU interview, he said, “West Virginia is tectonically very stable because it is located far from the plate boundaries and far from major active faults, so earthquakes are rare in the state. Small natural
earthquakes do occur once in a while because all of the Earth’s surface is under some degree of stress and the rocks have ancient planes of weakness which will slip eventually. In the past 40 years there have only been
about 25 quakes that were larger than magnitude 2.5 in West Virginia.”
For reference, earthquakes below a 2.5 magnitude are usually not even felt and those below 4 or 5 five usually cause zero damage, according to USGS.
https://www.wboy.com/weather/how-rare-are-earthquakes-in-west-virginia/
https://patch.com/virginia/across-va/2-6-earthquake-md-va-coast-confirmed-usgs
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misc.
https://pembrokeva.org/
Earthquake history W.VA. Nov. 20, 1969 misc:
https://pubs.geoscienceworld.org/ssa/srl/article-abstract/41/1/19/141600/The-Elgood-West-Virginia-Earthquake-of-November-20
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Date: June 17, 2023 at 07:36:10
From: Eve, [DNS_Address]
Subject: Re: M 2.6 - 2 km N of Pembroke, Virginia (+ misc. pertaining vicinity) |
URL: https://news.yahoo.com/eight-earthquakes-4-weeks-proves-183740852.html |
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pertaining miscellaneous...
EXCERPT:
Eight earthquakes in 4 weeks proves old fault exists near NC mountain town, USGS says
Mark Price
Fri, June 16, 2023, 2:37 PM EDT·3 min read
A North Carolina town was hit June 16 by its eight earthquake in just over three weeks, which means there’s an old fault line that’s now active, the U.S. Geological Survey says.
The quake was a 2.1, centered in a sparsely populated area about 2.4 miles north of West Canton.
That’s the same general area where seven previous earthquakes have been recorded since May 23, ranging from a 1.8 to a 3.2, records show.
Hundreds of witnesses have reported feeling some of the stronger quakes, but the latest had only one witness report as of midday Friday. That was filed by someone who felt weak shaking 8 miles away in the town of
Clyde, the USGS says.
All the quakes originated near Chambers Mountain, north of Interstate 40.
That means there is definitely an old fault in the area, the USGS says, but experts are at a loss as to why it has suddenly become active.
They also don’t know if the “cluster” will continue or come to a sudden halt.
“Earthquakes are caused when rocks under ground move. Sometimes, we have other earthquakes when those rocks come back to some kind of equilibrium,” USGS officials told McClatchy News.
Faults are cracks between two blocks of underlying rock that allow those “blocks to move relative to each other,” the USGS says. In some cases, the cracks can be several hundred miles deep.
“During an earthquake, the rock on one side of the fault suddenly slips with respect to the other. The fault surface can be horizontal or vertical or some arbitrary angle in between,” the USGS says.
All eight earthquakes were shallow and minor in magnitude, but that’s not to say stronger quakes aren’t possible, the USGS says.
The Appalachian Mountains are not on an active tectonic plate boundary — where earthquakes are common — but the region has sporadic minor quakes linked to old fault lines, geologists say.
Those faults date back hundreds of million years — to when the Appalachians were formed — and they can occasionally become active when stress builds in spots where the rock is weak, experts say.
West Canton is about 150 miles northwest of Charlotte.
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