EARTHQUAKES RECORDED BY GURLAP SYSTEMS SEISMOMETER

The Gurlap Systems CMG-EDU-T is a three-component seismometer with direct RS232 digital output that connects to a PC serial port. The instrument is ideal for continuously monitoring earthquakes and is used in that mode at SUNY Potsdam. The seismometer frequency range is 30 sec to 100 Hz so the instrument can be switched to short-period mode for local earthquake recording.

It is also a portable lightweight digital seismometer designed for easy and rapid deployment in the field. It may be deployed to study aftershocks of earthquakes, quarry blasts, and induced seismicity. The software SCREAM receives data from the serial port and displays waveforms in real time. The software is simple and easy to use.

Several major earthquakes have been recorded with the Gurlap Systems including the Chile and Haiti earthquakes. Local earthquakes and quarry blasts are also detected and studied. Printouts of the earthquake in color waveforms are obtained and locations of epicenters are determined by the back azimuth method. The seismograms of events may be used with information from www.IRIS.edu/hq/retm or teachable moments web site to acquire information about the recorded event. Information obtained from IRIS includes type of plate boundary at quake, epicenter, damage done by the quake, location of epicenter, intensity of quake, and historical earthquake data.