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97320 |
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Date: September 18, 2023 at 21:41:12
From: Daisy/CA, [DNS_Address]
Subject: Could tonight’s Paterson Ca quakes be precursors?(NT) |
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Responses:
[97321] [97338] [97325] [97323] [97327] [97330] [97337] |
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97321 |
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Date: September 18, 2023 at 21:45:24
From: EMY1, [DNS_Address]
Subject: High Chance! |
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Responses:
[97338] [97325] [97323] [97327] [97330] [97337] |
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97338 |
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Date: September 23, 2023 at 11:17:42
From: EMY1, [DNS_Address]
Subject: Loud Rumble Noise - 3.3 today |
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Responses:
None |
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97325 |
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Date: September 18, 2023 at 23:14:56
From: Daisy/Ca, [DNS_Address]
Subject: Re: High Chance! |
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Thank you. Will be on watch. Which way do you think it’s going? Up
north , Bay Area or south? Curious
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Responses:
None |
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97323 |
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Date: September 18, 2023 at 22:09:33
From: jordan, [DNS_Address]
Subject: Re: High Chance! |
URL: https://www.abc10.com/article/weather/severe-weather/san-joaquin-river-rising-patterson/103-8e0c0413-4735-4294-827f-cc6ca46818e6 |
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The San Joaquin Fault?
flooding in the area early this year
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Responses:
[97327] [97330] [97337] |
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97327 |
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Date: September 19, 2023 at 00:43:36
From: Redhart, [DNS_Address]
Subject: Re: High Chance! |
URL: https://earthquake.usgs.gov/earthquakes/eventpage/nc73938736/focal-mechanism |
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yeah, lots of snow and rain this year all over
California.
The quake itself was in the mountains to the west of
Patterson and was a mostly thrust quake.
The San Joaquin fault runs North/South.
The quake today was in between the San Joaquin fault
and the No/South Greenville fault...but was on an East-
West fault plane. Probably a minor unnamed fault. You
can tell the direction the small fault runs on the map
from the aftershock pattern that's filling in nicely.
The moment tensor and focal mechanism readings also
echo that this was a thrust fault on an east-west
direction.
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Responses:
[97330] [97337] |
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97330 |
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Date: September 20, 2023 at 12:23:45
From: Redhart, [DNS_Address]
Subject: article...SF chron, about the patterson quakes |
URL: https://www.sfchronicle.com/california/article/earthquakes-central-valley-18375909.php |
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This California county had its biggest earthquake in
100 years. Here’s what that means
By Clare Fonstein | San Francisco Chronicle
Sep. 19, 2023Updated: Sep. 19, 2023 3:06 p.m.
A California county experienced its largest earthquake
on record Monday night, amid a swarm of more than 10
earthquakes.
The 4.5 earthquake that occurred near Westley shortly
after 9 p.m. on Monday was bigger than any in
Stanislaus County going back a century in U.S.
Geological Survey records, said USGS research geologist
Austin Elliott.
While earthquakes like this don’t necessarily signal
anything big is imminent, they are a reminder that the
ground can shake at any moment, Elliott noted.
“No individual small earthquake inherently indicates
anything larger is coming, and most earthquakes of this
magnitude pass without further events and without
further larger events,” Elliott said.
Aftershock sequences can last weeks and months, but for
an earthquake of 4.5 magnitude, the aftershocks will
likely be small and people will stop being able to feel
them after a few days, he said.
Stanislaus County is seismically active, but 14
earthquakes in 24 hours is not typical.
image.png
“A lot of the people who felt these ones are living in
the Central Valley, Turlock, Modesto, Patterson … (and
are) probably not so used to having an earthquake occur
so close to them,” Elliott said.
The earthquakes Monday were caused by a mix of
compressional convergent faulting (thrust), where there
are two sides of a tectonic plate coming together, and
strike slip faulting, where there are two sides sliding
past each other, Elliott said.
Elliott said there are known faults in the region, but
the earthquakes were too small to pin on a specific
fault.
The faults in the region are known to produce
earthquakes, but they don’t lead to earthquakes as
often as the San Andreas and the Calaveras faults,
Elliott said.
He said the earthquakes could have been caused by fault
structures that are not mapped.
“Earthquakes of this magnitude — twos and threes and
fours — that may be happening, there are all kinds of
little fractures and faults that are possible to
produce small earthquakes,” Elliott said.
To the west of Stanislaus County are strike-slip faults
including the San Andreas and Calaveras, and to the
east of the county are convergent faults (thrust) on
the margin of the Central Valley.
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Responses:
[97337] |
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97337 |
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Date: September 23, 2023 at 09:56:34
From: ryan, [DNS_Address]
Subject: Re: article...SF chron, about the patterson quakes |
URL: https://www.sfgate.com/news/article/magnitude-3-3-earthquake-strikes-near-patterson-18384462.php |
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California Central Valley town hit with 7th earthquake of the week
Updated Sep 23, 2023 9:54 a.m.
The United States Geological Survey reports a preliminary magnitude 3.3 earthquake struck near Patterson, CA on Saturday.
The quake hit at 8:57 AM local time at a depth of 1 kilometers.
According to the Southern California Earthquake Data Center, it was the seventh earthquake to strike near Patterson in the past week. All of the earthquakes ranged between 3.0 and 4.5 in magnitude.
There was no initial word on damage or injury resulting from the quake. More information on this earthquake is available on the USGS event page.
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Responses:
None |
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