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

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Month: December 2017

Earthquake Report: 2017 Cascadia Summary

Posted on: December 31, 2017 Last updated on: December 31, 2017 Written by: Jay Patton Comments: 0
Here I summarize the seismicity for Cascadia in 2017. I limit this summary to earthquakes with magnitude greater than or equal to M 2.5. I prepared reports for 6 of the 7 earthquakes presented (using moment tensors) on the main…
Continue reading “Earthquake Report: 2017 Cascadia Summary”…

Earthquake Report: 2017 Summary

Posted on: December 30, 2017 Last updated on: December 30, 2017 Written by: Jay Patton Comments: 0
Here I summarize Earth’s significant seismicity for 2017. I limit this summary to earthquakes with magnitude greater than or equal to M 6.5. There were only 6 earthquakes greater than or equal to M 7.0 in 2017 (compared to 17…
Continue reading “Earthquake Report: 2017 Summary”…

Earthquake Report: Iran

Posted on: December 30, 2017 Last updated on: December 1, 2023 Written by: Jay Patton Comments: 0
A couple weeks following the earthquake in eastern Iraq, there was a sequence of earthquakes in central eastern Iran. These earthquakes are too distant to be related. The Iranian sequence includes a M 6.1 foreshock on 2017.12.01 and two M…
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Earthquake Report: Iraq

Posted on: December 30, 2017 Last updated on: November 12, 2023 Written by: Jay Patton Comments: 0
A month and a half ago, I was attending the PATA conference and an earthquake hit Iran and Iraq the night before our first field trip. Thus, I did not have the time to address this earthquake at the time.…
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Earthquake Report: Java!

Posted on: December 15, 2017 Last updated on: August 30, 2023 Written by: Jay Patton Comments: 0
This morning (my time) there was a deep earthquake along the subduction zone beneath Java. The M 6.5 earthquake hypocentral depth is deeper than the subduction zone megathrust fault, so it is the downgoing Australia plate (AP). My initial interpretation…
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Earthquake Report: Laytonville (northern CA)!

Posted on: December 14, 2017 Last updated on: December 13, 2023 Written by: Jay Patton Comments: 0
This morning there was a small earthquake in a region of northern California between two major faults that are part of the Pacific-North America plate boundary. The M 4.3 earthquake occurred between the San Andreas fault (SAF) to the west…
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Earthquake Report: Caroline Ridge Update #1

Posted on: December 9, 2017 Last updated on: December 9, 2017 Written by: Jay Patton Comments: 0
Well, there was an earthquake this morning (my time) that may help us select a fault plane solution. Recall that these fault plane solutions (moment tensors and focal mechanisms) have two possible fault planes. We need additional information (like fault…
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Earthquake Report: Caroline Ridge

Posted on: December 8, 2017 Last updated on: December 10, 2023 Written by: Jay Patton Comments: 0
There was an earthquake sequence beginning 2017.12.08 along the northern flank of Caroline Ridge in the western Pacific Ocean, near the intersection of the Mariana and Yap trenches. The two largest earthquakes, M 6.5 and M 6.4, are both strike-slip…
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