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Month: May 2015

Historic Seismicity Animations: Izu-Bonin, Mariana: 1940 – 2015

Posted on: May 31, 2015 Last updated on: May 31, 2015 Written by: Jay Patton Comments: 0
Following up on the seismicity in the western Pacific, I put together a couple animations. My post about the deep mainshock (magnitude M = 7.8 ) is here. My second post has some aftershocks plotted (and some foreshocks), as well…
Continue reading “Historic Seismicity Animations: Izu-Bonin, Mariana: 1940 – 2015”…

Triggered Earthquakes: Izu-Bonin

Posted on: May 31, 2015 Last updated on: May 31, 2015 Written by: Jay Patton Comments: 2
Well, we had a large magnitude earthquake (M = 6.2) triggered by the M 7.8 deep earthquake along the Izu-Bonin Trench. Here is my post from yesterday. Note the triggered earthquake is in a region where there were earthquakes about…
Continue reading “Triggered Earthquakes: Izu-Bonin”…

Earthquake in Izu-Bonin!

Posted on: May 30, 2015 Last updated on: May 30, 2015 Written by: Jay Patton Comments: 6
Early this morning (luckily I was not awake at the time) we had a really deep (~677km) M = 7.8 extensional earthquake along the Bonin Trench in the western Pacific. Here is the USGS page for this earthquake. Here is…
Continue reading “Earthquake in Izu-Bonin!”…

Animation of Seismicity along the Alaska/Aleutian Arc

Posted on: May 29, 2015 Last updated on: May 29, 2015 Written by: Jay Patton Comments: 4
This took me just a few minutes to put together. I searched the USGS earthquakes website with a rectangular search area for earthquakes greater than M = 6.0, downloaded the google Earth kml file with epicenters colored by depth (and…
Continue reading “Animation of Seismicity along the Alaska/Aleutian Arc”…

Earthquake along the Alaska Penninsula!

Posted on: May 29, 2015 Last updated on: May 29, 2015 Written by: Jay Patton Comments: 5
We just had an earthquake along the Alaska Peninsula. The magnitude is currently set at 6.7 on the USGS website. The Peninsula is a volcanic arc that forms as a result of the subduction of the Pacific plate beneath the…
Continue reading “Earthquake along the Alaska Penninsula!”…

Gorda earthquake triggered a Gorda earthquake?

Posted on: May 26, 2015 Last updated on: May 26, 2015 Written by: Jay Patton Comments: 0
We just had an earthquake along the nodal plane of the Gorda plate earthquake earlier today. Here is the USGS web page for the Gorda M = 4.3 earthquake and here is the USGS web page for the Gorda plate…
Continue reading “Gorda earthquake triggered a Gorda earthquake?”…

Gorda plate earthquake: 2010 zone strikes again

Posted on: May 26, 2015 Last updated on: May 26, 2015 Written by: Jay Patton Comments: 7
Early this morning we had a small rumbler offshore of northern California, generally in the same location as the 2010.01.10 earthquake. I remember the 2010 earthquake very well as the ground shaking lasted over 20 seconds in Manila. Here is…
Continue reading “Gorda plate earthquake: 2010 zone strikes again”…

Mid Atlantic Ridge Plate Boundary

Posted on: May 25, 2015 Last updated on: May 25, 2015 Written by: Jay Patton Comments: 2
In the past week, there have been a few earthquakes along the Mid Atlantic Ridge (MAR) and some associated fracture zones. The Mid Atlantic Ridge is a divergent plate boundary. As the plates move apart, the asthenosphere is decompressed and…
Continue reading “Mid Atlantic Ridge Plate Boundary”…

Sandwich Islands Earthquake… mmmm

Posted on: May 24, 2015 Last updated on: May 24, 2015 Written by: Jay Patton Comments: 1
We just had a M 5.8 earthquake in the volcanic arc region of the Scotia subduction zone. The moment tensor (currently) shows an extensional mechanism. I will post more on this as I am about to hit the road. Here…
Continue reading “Sandwich Islands Earthquake… mmmm”…

Santa Cruz (western Pacific) Earthquake Swarm!

Posted on: May 24, 2015 Last updated on: May 24, 2015 Written by: Jay Patton Comments: 4
The past couple of days have brought us a series of large magnitude strike-slip earthquakes along a plate boundary between the Solomon Trench and the New Hebrides Trench. I posted about the first earthquake here and here. This swarm of…
Continue reading “Santa Cruz (western Pacific) Earthquake Swarm!”…
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