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The Center, Body, and Range of Technically Defensible Interpretations. The CBD of TDI.

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Month: April 2015

Earthquake in New Britain

Posted on: April 30, 2015 Last updated on: April 30, 2015 Written by: Jay Patton Comments: 1
Well, we just had a Mw 6.7 earthquake along the coast of New Britain. This region has been active lately… Here is the USGS web page for this earthquake. Here is a map showing the epicenter with Modified Mercalli Intensity…
Continue reading “Earthquake in New Britain”…

Updated Historic Seismicity: Nepal, Himalayas (3 data sets)

Posted on: April 27, 2015 Last updated on: April 27, 2015 Written by: Jay Patton Comments: 9
I have added one more polygon data set to the three main data sets that include records of historic earthquake slip patches. The three data sets now include Bilham (2004), Bettinelli et al (2006), and Berryman et al. (2009). I…
Continue reading “Updated Historic Seismicity: Nepal, Himalayas (3 data sets)”…

Surface Displacement and Ground Motion Maps: Nepal

Posted on: April 27, 2015 Last updated on: April 27, 2015 Written by: Jay Patton Comments: 2
I have taken a couple products and combined them in google earth to help us learn about the impact of the Nepal 2015.04.25 Mw 7.8 earthquake. Here is the link to the USGS web page for this earthquake. I provide…
Continue reading “Surface Displacement and Ground Motion Maps: Nepal”…

Nepal: PGA, DYFI, and the latest attenuation plot.

Posted on: April 26, 2015 Last updated on: April 26, 2015 Written by: Jay Patton Comments: 4
Well, data continue to come in. Below I plot the USGS Peak Ground Acceleration model results overlain upon the local map that I have been using to compare the current swarm of seismic activity with historic and prehistoric earthquake slip…
Continue reading “Nepal: PGA, DYFI, and the latest attenuation plot.”…

Updated Historic and Prehistoric Maps

Posted on: April 26, 2015 Last updated on: April 26, 2015 Written by: Jay Patton Comments: 3
I have updated a couple of these maps and include a figure from a recent presentation given by Roger Bilham at AGU (2011). Here was my original and first updated posts about this earthquake and here is my first compilation…
Continue reading “Updated Historic and Prehistoric Maps”…

Historic Earthquakes in the Himalayas

Posted on: April 25, 2015 Last updated on: April 25, 2015 Written by: Jay Patton Comments: 1
I have digitized some compilations of earthquake slip regions from a few papers and summarize these on the map below. The two main references are Bilham (blue; 2004) and Bettinelli et al. (orange; 2006). There are a couple of earthquakes…
Continue reading “Historic Earthquakes in the Himalayas”…

Nepal Aftershock Region and Historic Earthquakes

Posted on: April 25, 2015 Last updated on: April 25, 2015 Written by: Jay Patton Comments: 13
Here is an updated map that shows the aftershocks following the devastating earthquake in Nepal. I have tentatively plotted the locations (epicenters) of some historic earthquakes in this region. Today’s earthquake ranks among the largest and approaches the size and…
Continue reading “Nepal Aftershock Region and Historic Earthquakes”…

Earthquake in Nepal!

Posted on: April 24, 2015 Last updated on: April 24, 2015 Written by: Jay Patton Comments: 23
We just had a large earthquake in Nepal! The moment tensor shows that this is a thrust/reverse (originally it was solved as a strike slip) earthquake. I will need to do a little more investigating about this tomorrow. (I am…
Continue reading “Earthquake in Nepal!”…

Mendocino fault Earthquake

Posted on: April 23, 2015 Last updated on: April 23, 2015 Written by: Jay Patton Comments: 3
This sure looks like an earthquake on the Transform Plate Boundary fault system known as the Mendocino fault. I have plotted the moment tensor for this earthquake. The shaking intensity contours are plotted. Here is the USGS web page for…
Continue reading “Mendocino fault Earthquake”…

Earthquake near Taiwan

Posted on: April 20, 2015 Last updated on: April 20, 2015 Written by: Jay Patton Comments: 2
Well, we just had a swarm of earthquakes with magnitudes near Taiwan. The USGS web pages for these earthquakes are here: M = 6.0, 6.1, and 6.4. This is a complicated tectonic region and there are many different and differing…
Continue reading “Earthquake near Taiwan”…
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