Significant Earthquakes
5
5.9
5
5.9
Earthquake Hazards
The USGS monitors and reports on earthquakes, assesses earthquake impacts and hazards, and conducts targeted research on the causes and effects of earthquakes. We undertake these activities as part of the larger National Earthquake Hazards Reduction Program (NEHRP), a four-agency partnership established by Congress.
Using Distant Seismometers to Monitor and Analyze Volcanic Eruptions

A new Science for Everyone web article: Before a volcano erupts, there are typically precursory activities that can be detected on seismometers. Thus, monitoring volcanoes with nearby seismometers is a good way to know when a volcanic eruption may be imminent. However...