USGS

Dover, DE earthquake, November 30, 2017

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At shortly before 5 pm on Thursday, November 30, 2017, there was a magnitude 4.1 earthquake east of Dover, DE. This event has caused little damage and no casualties.

Celebrate Geologic Map Day on October 13, 2017!

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Geologic Map Day
Celebrate Geologic Map Day on October 13, 2017!

Welcome to Geologic Map Day, a special event designed to promote awareness of geologic mapping and its vital importance to society.

Geologic Map Day - October 16, 2015

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Geologic Map Day 2015, a special event designed to promote awareness of geologic mapping and its vital importance to society.