M4.2 (12 July) and M3.9 (14 July), Oklahoma: the Earthquake Series Continues

Oklahoma fracking quake swarm

Two notable earthquakes in Oklahoma on 12 and 14 July 2014 represent the continuation of an earthquake series associated with human activity.

Southern Mexico, the Himalyas and the Rockies: Earthquakes 3-9 July 2014

The week's earthquakes in the Indo-Eurasian collision zone. Image credit: USGS

This week an earthquake in southern Mexico killed three people, while other earthquakes occurred in the western Himalayan margin and in California and Arizona.

Whodunnit? What Caused the M5.2 Arizona Earthquake of 29 June 2014

Location of the 29 June Arizona/New Mexico earthquake, northwest of Lordsburg, New Mexico. Image credit: USGS

June 29 saw an M5.2 earthquake in a seismically-quiet area on the Arizona-New Mexico border. What caused the quake: fracking, volcano, or an existing fault?

New Zealand’s Kermadec Islands Struck by M6.9 Earthquake

The tectonic setting of the M6.9 New Zealand quake is complex. Image courtesy USGS

New Zealand just had a M6.9 earthquake, and a few significant aftershocks. What’s causing all that seismic activity in the Kermadec Islands?

Mid-Ocean Ridges and Alaska: Earthquakes 5-11 June 2014

Earthquakes in Alaska in the week 5-11 June 2014. Image credit: USGS

Though there were no large earthquakes at subduction zones this week, there were noteworthy earthquakes at constructive and conservative margins.