-
Archives
- October 2019
- August 2019
- July 2019
- June 2019
- May 2019
- April 2019
- March 2019
- February 2019
- January 2019
- December 2018
- November 2018
- October 2018
- September 2018
- August 2018
- July 2018
- May 2018
- April 2018
- March 2018
- February 2018
- January 2018
- December 2017
- November 2017
- September 2017
- August 2017
- July 2017
- June 2017
- May 2017
- April 2017
- March 2017
- February 2017
- January 2017
- December 2016
- November 2016
- October 2016
- September 2016
- August 2016
- July 2016
- June 2016
- April 2016
- March 2016
- February 2016
- January 2016
- December 2015
- November 2015
- October 2015
- September 2015
- August 2015
- July 2015
- June 2015
- May 2015
- April 2015
- March 2015
- February 2015
- January 2015
- December 2014
- November 2014
- October 2014
- September 2014
- August 2014
- June 2014
- May 2014
- April 2014
- March 2014
- February 2014
- December 2013
- November 2013
- October 2013
- September 2013
- August 2013
- July 2013
- May 2013
- April 2013
- February 2013
- January 2013
- December 2012
- October 2012
- September 2012
- August 2012
- May 2012
- April 2012
- March 2012
- April 1970
-
Meta
Monthly Archives: September 2015
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
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
2015.09.16 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
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 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
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
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
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
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
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