***Please note venue & price changes***
(we have had to raise our prices due to current food costs)
$35.00 Pre-Registration
$45.00 Late Registration
LUNCHEON WILL BE HELD ON THE MAIN FLOOR - EXHIBIT HALL E
A NOVEL LOW-COST, AUTONOMOUS, AND LOCAL DENSE ARRAY TO INCREASE THE ACCURACY OF EVENT LOCATIONS FOR REAL-TIME INDUCED SEISMICITY MONITORING.
We have developed a real-time, autonomous, and low-cost sensor network system for induced seismicity monitoring. A field experiment was conducted in Texas to investigate using a low-cost local dense array for real-time and continuous induced seismicity monitoring. We installed a dense local network that consisted of 16 seismic sensors in a 15 km2 area and continuously monitored a hydraulic fracking operation to provide real-time fault reactivation alerts. Several induced seismic events with local magnitude (ML) less than 3 were detected around the monitoring site. We found that the local-array-derived event locations differed from the regional-array-derived (USGS) results by several kilometers in both lateral position and depth. We believe that the results derived from our local dense arrays are more accurate. This is because event hypocenters and magnitudes are less influenced by the complexities of earth’s velocities. Unlike traditional seismometers, we can precisely measure the sensor orientation using the built-in 3-component magnetometer. Furthermore, we found that events determined using distant regional stations (~tens of kilometers away) tend to be deeper, leading to overestimation of the local magnitude values. This could potentially increase the risk of triggering a false alarm for induced seismicity hazards. In conclusion, this field experiment demonstrated that we significantly increased the accuracy of both event location and magnitude using our low-cost sensors in a local dense array for real-time induced seismic monitoring.
