[unav_all] IRIS WEBINAR - Yes, Humans Really Are Causing Earthquakes - 2/3 3 PM Eastern

Danielle Sumy danielle.sumy at iris.edu
Wed Jan 27 07:37:56 MST 2016

Please register for Yes, Humans Really Are Causing Earthquakes - February 3, 2016 on Feb 3, 2016 3:00 PM EST at: 

https://attendee.gotowebinar.com/register/474442938119897601 <https://attendee.gotowebinar.com/register/474442938119897601>

Presenter: Justin Rubinstein, USGS-Menlo Park 

Abstract: The central United States is experiencing an unprecedented surge in earthquakes that began in 2009, rising from an average of 21 magnitude 3 and larger quakes to over 650 in 2014 alone. This increased earthquake activity is found in just a few concentrated regions around the country, with the lion’s share in Oklahoma. In 2014 there were more magnitude 3, and larger, earthquakes in Oklahoma than there were in California. The increased earthquake activity is limited to areas of new and emerging oil and gas production and is undoubtedly caused by some of the techniques they use. 

With a focus on oil and gas production and related techniques, I will discuss the many ways that humans can cause earthquakes. In the case of fluid injection, the primary source of the recent increase in earthquake rate, the fluid pressure increase from injection can be transferred many miles from the injection point. This fluid-pressure increase, in effect, lubricates the faults, making them more prone to slipping in earthquakes. 

Recent research shows that the rate at which injection occurs strongly influences whether earthquakes will be induced; areas with higher injection rates are more likely to have induced earthquakes. Other parameters, like the total volume injected and the depth of injection are also believed to affect the likelihood of induced earthquakes. Additionally, local geological conditions are important; despite similar injection practices, there is very little injection-induced seismicity in North Dakota in stark contrast to Oklahoma. 

After registering, you will receive a confirmation email containing information about joining the webinar. NOTE: Registration does not confirm or guarantee you will have a spot during the webinar, as we are limited to 100 participants. Webinars are archived for later viewing at https://www.youtube.com/playlist?list=PLD4D607C2FA317E6D <https://www.youtube.com/playlist?list=PLD4D607C2FA317E6D> 
Danielle Sumy, PhD
Project Associate
Instrumentation Services
Education and Public Outreach
Phone: 202-682-2220 x168
Email: danielle.sumy at iris.edu

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