Guam sits beside the Marianas Trench, one of the most active seismic zones on Earth, and felt earthquakes happen several times a year. This page lists every earthquake of magnitude 2.5 or more that USGS has recorded within 1,000 km of Guam in the last 30 days — time in ChST, magnitude, location, depth, distance from Guam and USGS Did You Feel It? reports — and the latest Pacific Tsunami Warning Center statement for Guam/CNMI. What to do, per GHS/OCD and NOAA: during shaking, drop, cover and hold on; at the coast, strong or long shaking or the sea pulling back are natural tsunami warnings — move to high ground or inland right away without waiting for an official warning; afterward, expect aftershocks, check for injuries, gas leaks and damage, and follow GHS/OCD and NWS. A Tsunami Watch, Advisory or Warning for Guam appears at the top of this site as soon as NWS issues it.