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Category: College Redwoods (page 11)

Earthquake between the San Andreas and Maacama!

Posted on: August 30, 2015 Last updated on: August 30, 2023 Written by: Jay Patton Comments: 6
Saturday morning (2015.08.29), residents in Fort Bragg were awakened by a M 3.6 earthquake along a fault that lies between the San Andreas fault (SAF) to the west and the Maacama fault (MF) to the east. Here is the USGS…
Continue reading “Earthquake between the San Andreas and Maacama!”…

Mendocino fault earthquake

Posted on: April 10, 2015 Last updated on: April 10, 2015 Written by: Jay Patton Comments: 5
We had a small magnitude earthquake “today” along the Mendocino fault system approximately 150 km west of Cape Mendocino. Here is the USGS web page for the Mw 4.8 earthquake. Based upon the tectonic setting, the hypocentral depth, and the…
Continue reading “Mendocino fault earthquake”…

New Britain trench seismicity: 2000 through March 2015

Posted on: March 29, 2015 Last updated on: March 29, 2015 Written by: Jay Patton Comments: 15
I have here placed the moment tensors for the large magnitude earthquakes along the New Britain trench for the time period from 2000 through March 2015. Note that the Mw 8.0 has a strike-slip moment tensor. There is a transform…
Continue reading “New Britain trench seismicity: 2000 through March 2015”…

Molucca Earthquake

Posted on: March 17, 2015 Last updated on: March 17, 2015 Written by: Jay Patton Comments: 3
This region is a seismically active region. Today we had a M 6.2 earthquake. Here is the USGS web page for this earthquake. Last November, there were a series of large magnitude compression aearthquakes. Here are some posts about these…
Continue reading “Molucca Earthquake”…

Moderately Deep Focus Earthquake in Colombia

Posted on: March 10, 2015 Last updated on: March 10, 2015 Written by: Jay Patton Comments: 4
There was a moderately deep focus extensional earthquake beneath Colombia today. Here is the USGS web page for this earthquake. Here is a map that shows the epicenter as a green dot. Historic earthquake epicenters are plotted in grey. The…
Continue reading “Moderately Deep Focus Earthquake in Colombia”…

Earthquake near Siberut, Indonesia: Sumatra Megathrust

Posted on: March 4, 2015 Last updated on: March 4, 2015 Written by: Jay Patton Comments: 0
Yesterday (I was busy getting a Mt. St. Helens field trip together, here is the link for that) we had an earthquake with a magnitude M = 6.1. While this is not a large earthquake, it is notable because this…
Continue reading “Earthquake near Siberut, Indonesia: Sumatra Megathrust”…

another earthquake in the east Java / Timor region of Indonesia

Posted on: February 28, 2015 Last updated on: February 28, 2015 Written by: Jay Patton Comments: 5
We had another earthquake in this region today. This is an interesting area of the world since this is a place where there is a transition between subduction to the west and collision to the east. The Island of Timor…
Continue reading “another earthquake in the east Java / Timor region of Indonesia”…

Indonesia Strikes Again

Posted on: February 27, 2015 Last updated on: February 27, 2015 Written by: Jay Patton Comments: 2
A deep earthquake has occurred probably within the downgoing Indo-Australia plate. The moment tensor shows oblique extension (part strike-slip, part normal). The depth aligns with the depth of the plate given the Hayes et al. (2012) slab models (which ends…
Continue reading “Indonesia Strikes Again”…

another northeast Japan earthquake in the Tohoku-Oki earthquake region

Posted on: February 25, 2015 Last updated on: February 25, 2015 Written by: Jay Patton Comments: 2
We have had another small aftershock. Here is the USGS web page for this earthquake. This time it is in a different region than the swarm of the past couple of weeks. There are several report updates, listed here: 2015.02.16…
Continue reading “another northeast Japan earthquake in the Tohoku-Oki earthquake region”…

Gorda plate earthquake 2015.02.24

Posted on: February 24, 2015 Last updated on: February 24, 2015 Written by: Jay Patton Comments: 1
Where else would we get a focal mechanism or moment tensor for an earthquake of such a small magnitude! We are so lucky. This is the USGS web page for the earthquake. We get Gorda plate earthquakes frequently and most…
Continue reading “Gorda plate earthquake 2015.02.24”…
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