Category Archives: Indian Ocean

Earthquake Report: Mentawai, Sumatra

We just had an earthquake in the Mentawai region of the Sunda subduction zone offshore of Sumatra. Here is the USGS website for this M 6.3 earthquake. Based upon the hypocentral depth and the current estimate of the location of … Continue reading

Posted in earthquake, education, geology, Indian Ocean, plate tectonics, subduction, sumatra

Earthquake Report: Bengkulu (Sumatra)!

Last night (my time) while I was tending to other business, there was an earthquake along the Sunda Megathrust. Here is the USGS website for this M 6.4 earthquake. This M 6.4 earthquake happened down-dip (“deeper than”) along the megathrust … Continue reading

Posted in asia, earthquake, education, geology, Indian Ocean, Indonesia, plate tectonics, subduction, sumatra

Earthquake Report: Makran subduction zone (Pakistan)!

There was a good sized earthquake along the Makran subduction zone. This subduction zone is a convergent plate boundary where the Arabia plate subducts (goes beneath) northwards under the Eurasia plate. There has been one aftershock reported by the USGS. … Continue reading

Posted in asia, geology, Indian Ocean, plate tectonics, subduction, tsunami

Earthquake Anniversary: Sumatra-Andaman 2004 M 9.2 & 2005 M 8.6

On 26 December 2004 there was an earthquake with a magnitude of M 9.2 along the Sumatra-Andaman subduction zone (SASZ). This earthquake is the third largest earthquake ever recorded by modern seismometers and ruptured nearly 2,000 km of the megathrust … Continue reading

Posted in asia, earthquake, education, geology, HSU, Indian Ocean, plate tectonics, subduction, sumatra, tsunami

Earthquake Report: Java Sea!

Last night as I was finishing work for the day, I noticed an earthquake in the Java Sea, just north of western Java. Here is the USGS website for this M 6.6 earthquake. This earthquake is extensional and plots very … Continue reading

Posted in collision, earthquake, education, geology, HSU, Indian Ocean, Indonesia, plate tectonics, subduction, sumatra

Earthquake Report: Burma!

Well, there was an earthquake about 6 hours ago in Burma. This M 6.8 earthquake was rather deep, which is good for the residents of that area (the ground motions diminish with distance from the earthquake hypocenter). Here is the … Continue reading

Posted in asia, collision, education, geology, HSU, Indian Ocean, plate tectonics, sumatra

Earthquake Report: Sumatra!

We just had a M = 7.8 earthquake southwest of the Island of Sumatra, a volcanic arc formed from the subduction of the India-Australia plate beneath the Sunda plate (part of Eurasia). Here is the USGS website for this earthquake. … Continue reading

Posted in asia, College Redwoods, earthquake, education, geology, HSU, Indian Ocean, Indonesia, plate tectonics, strike-slip, subduction, sumatra, Transform

Earthquake Report: Antarctic plate!

We just had an interesting mid-plate earthquake (not along a plate boundary). Hat Tip to Jascha Polet, who pointed out this is in the region of the 1998 M 8.1 earthquake, one of the largest strike-slip and mid-plate earthquakes ever … Continue reading

Posted in College Redwoods, earthquake, education, geology, HSU, Indian Ocean, New Zealand, pacific, plate tectonics, strike-slip, Transform

Earthquake Report: India!

Today we had a good sized earthquake in eastern India, within the India-Burmese wedge (IBW). The IBW is a part of the convergent plate boundary between the India plate to the west and the Burma (part of Eurasia) plate to … Continue reading

Posted in asia, College Redwoods, collision, earthquake, education, geology, HSU, Indian Ocean, Indonesia, plate tectonics, strike-slip

Earthquake Report: 2015 Summary M GT 7

Here I summarize the global seismicity for 2015. I limit this summary to earthquakes with magnitude greater than or equal to M 7.0. I reported on all but one of these earthquakes. I include summaries of my earthquake reports in … Continue reading

Posted in asia, Chemeketa Community College, College Redwoods, earthquake, education, geology, HSU, Indian Ocean, Indonesia, pacific, plate tectonics, strike-slip, subduction, Transform, tsunami