Technical Information

REV gets all of its data from the IRIS DMC through the Fissures/DHI service. It uses SOD to gather and choose the data for viewing. REV only allows earthquakes greater than 5.5 magnitude for worldwide earthquakes and greater than 3 magnitude in the United States. Its stations are any in the IRIS DMC with data in the last week. Seismograms are only presented if they pass a signal to noise calculation and various filtering is done before presenting them in REV. If you have any questions about this process, feel free to email us at