Monthly Archives: September 2015

2015/09/19
12:24 PM
by: Jay Patton

2015.09.16 Chile Update #3

The aftershocks continue and will do so for weeks. Aftershocks from the 2011.03.27 Tohoku-Oki M 9.0 earthquake continue today. The decay rate for seismicity relates to characteristics of the fault called the b-value. The b-value can be determined/modeled in several … Continue reading →

Posted in College Redwoods, earthquake, education, geology, HSU, pacific, plate tectonics, subduction, tsunami

2015/09/18
2:45 PM
by: Jay Patton

Chile Historic Tsunami Comparisons

Here are three tsunami wave amplitude models from NOAA for three Great (magnitude > 8.0) earthquakes in Chile. Here are the USGS websites for the three earthquakes that generated these earthquakes, plus the one from 2015.09.16 not shown on the … Continue reading →

Posted in College Redwoods, earthquake, education, geology, HSU, pacific, plate tectonics, subduction, tsunami

2015/09/17
8:19 PM
by: Jay Patton

2015.09.16 Chile Update #2

Here I post some updates about the M 8.3 Great Earthquake in Chile and the associated tsunami observations and models. I have three earlier posts about this earthquake and tsunami event. First Post Update #1 Tsunami Observations Here is an … Continue reading →

Posted in Uncategorized

2015/09/17
10:29 AM
by: Jay Patton

Chile M 8.3 Earthquake: Tsunami Observations!

Here are a couple of videos that document the arrival of tsunami waves in the “mouth of Genio river at Wafer Bay, Cocos Island, Costa Rica. Cocos Island is a National Park located between Galapagos Islands and the continental coast … Continue reading →

Posted in College Redwoods, earthquake, education, geology, HSU, pacific, plate tectonics, subduction, tsunami

2015/09/16
8:18 PM
by: Jay Patton

2015.09.16 Chile Update #1

Here are some updates to this earthquake and tsunami. First, here is an updated map. I have included an illustration from Atwater et al. (2005) that shows the earthquake cycle at a subduction zone. A subduction zone is a convergent … Continue reading →

Posted in College Redwoods, earthquake, education, geology, HSU, pacific, plate tectonics, subduction, tsunami

2015/09/16
6:14 PM
by: Jay Patton

Great Tsunamigenic Earthquake offshore Chile!

[Additional information is posted in a supplementary post here.] Well, I was in the middle of a Quaternary Stratigraphy lab when this hit, so it took a while to get home. My delay pales in comparison to the probably large … Continue reading →

Posted in College Redwoods, earthquake, education, geology, HSU, pacific, plate tectonics, subduction, tsunami

2015/09/13
11:25 AM
by: Jay Patton

Gulf of California Earthquakes! (first update)

Here is an update to the early morning post… I have prepared an updated map that shows the fracture zones, spreading ridges, transform faults, and basins in the region of seismicity from the past 24 hours. Here is the map. … Continue reading →

Posted in College Redwoods, earthquake, education, Extension, geology, HSU, pacific, plate tectonics, San Andreas, strike-slip, Transform

2015/09/13
1:13 AM
by: Jay Patton

Gulf of California Earthquakes! (first post)

We just had a few earthquakes in the Gulf of California (GOC). The results are early, so there is not a moment tensor plotted yet (updated map shows it now). The epicenters plot in the Farallon Baisn. The Gulf of … Continue reading →

Posted in College Redwoods, earthquake, education, geology, HSU, pacific, plate tectonics, San Andreas, strike-slip, Transform

2015/09/12
12:04 PM
by: Jay Patton

Earthquake in Papua New Guinea!

In the last ~24 hours, we have had a few earthquakes in northeastern Papua New Guinea, all in the M 5 range. Here are the USGS web sites for these earthquakes: 2015.09.11 M 5.5 2015.09.11 M 5.3 2015.09.12 M 5.0 … Continue reading →

Posted in asia, College Redwoods, collision, earthquake, education, geology, HSU, Indonesia, pacific, plate tectonics, subduction, Transform

2015/09/07
12:03 PM
by: Jay Patton

Kermadec trench earthquake!

Last night there were a few earthquakes along the Kermadec trench, which is a convergent plate boundary (subduction zone) where the Pacific plate subducts westward beneath the Australia plate. Here is the USGS website for this M 6.4 earthquake. Recent … Continue reading →

Posted in College Redwoods, earthquake, education, geology, HSU, pacific, plate tectonics, subduction