Detecting Earthquakes around Salton Sea Following the 2010 Mw7.2 El Mayor-Cucapah Earthquake Using GPU Parallel Computing
نویسندگان
چکیده
The recently developed matched filter technique is effective in detecting earthquakes during intensive aftershock or swarm sequences. However, currently our detection code can only process on single-CPU computers, which takes a long time to perform the cross-correlation between continuous seismic data and template events. In this paper, we present a GPU-based computation method to significantly accelerate the detection algorithm. By dividing the procedure into several routines and processing them in parallel, we achieve ~40 times speedup for one Nvidia GPU card compared to sequential CPU code. We apply the paralleled code to search around the Salton Sea geothermal field for missing earthquakes in a 90-day time window around the occurrence time of the 2010 Mw7.2 El Mayor-Cucapah earthquake. We obtain ~70 times more earthquakes than listed in the official Southern California Seismic Network catalog. These newly detected events could be used to help to better understand how earthquakes are triggered in the immediate vicinity of a mainshock rupture.
منابع مشابه
Mud volcano response to the 4 April 2010 El Mayor‐Cucapah earthquake
[1] Mud volcanoes sometimes respond to earthquakes, but the mechanisms by which earthquakes trigger changes in ongoing eruptions or initiate new eruptions are not completely understood. We measured gas discharge at a field of mud volcanoes near the Salton Sea, southern California, before and after the 4 April 2010 El Mayor‐Cucapah earthquake and observed an increase in gas flux immediately foll...
متن کاملLocally and remotely triggered aseismic slip on the central San Jacinto Fault near Anza, CA, from joint inversion of seismicity and strainmeter data
We study deep aseismic slip along the central section of the San Jacinto Fault, near the Anza Seismic Gap, in southern California. Elevated strain-rates following the remote Mw7.2 April 4, 2010 El Mayor-Cucapah and the local Mw5.4, July 7, 2010 Collins Valley earthquakes were recorded by Plate Boundary Observatory borehole strain-meters near Anza, and were accompanied by vigorous aftershock seq...
متن کاملApplication of Collocated GPS and Seismic Sensors to Earthquake Monitoring and Early Warning
We explore the use of collocated GPS and seismic sensors for earthquake monitoring and early warning. The GPS and seismic data collected during the 2011 Tohoku-Oki (Japan) and the 2010 El Mayor-Cucapah (Mexico) earthquakes are analyzed by using a tightly-coupled integration. The performance of the integrated results is validated by both time and frequency domain analysis. We detect the P-wave a...
متن کاملSuperficial simplicity of the 2010 El Mayor–Cucapah earthquake of Baja California inMexico
The geometry of faults is usually thought to be more complicated at the surface than at depth and to control the initiation, propagation and arrest of seismic ruptures1–6. The fault system that runs from southern California into Mexico is a simple strike-slip boundary: the west side of California and Mexico moves northwards with respect to the east. However, the Mw 7.2 2010 El Mayor–Cucapah ear...
متن کاملResults of the Regional Earthquake Likelihood Models (RELM) test of earthquake forecasts in California.
The Regional Earthquake Likelihood Models (RELM) test of earthquake forecasts in California was the first competitive evaluation of forecasts of future earthquake occurrence. Participants submitted expected probabilities of occurrence of M ≥ 4.95 earthquakes in 0.1° × 0.1° cells for the period 1 January 1, 2006, to December 31, 2010. Probabilities were submitted for 7,682 cells in California an...
متن کامل