Every Three Minutes, An Earthquake Strikes In California
Since large earthquakes are rare, cataloging the tiniest of quakes provides the researchers with a vast untapped dataset that will now allow them to dig deeper and better study the patterns and relationships between events. For areas like the U.S. Midwest, van der Lee says, template matching is also a challenge since earthquake monitoring is scarce and quakes are relatively infrequent. Without past quake templates, many true earthquake signals are left out of the data.
Source: www.nationalgeographic.com