Earthquakes in Delaware
Too few earthquakes here to say what is "normal"
Only 4 earthquakes of M1.5 or largerhave been recorded in Delaware in the 10 years of record we hold, and most weeks have none. A QuakeIndex score is a percentile against this place's own weeks — and when almost every week is empty, that number would just be reporting whether anything happened at all, dressed up as a percentile. So we do not publish one.
This is a statement about Delaware, not about our data: it is a quiet place. There have been none of M1.5 or larger in the last 7 days.
USGS catalogue · updated
The last 30 days
Live · last 7 days
Latest earthquakes in Delaware
None in Delaware in the latest snapshot we hold; the full 7 days load from USGS as this page opens.
Source USGS · snapshot of
Where this is
Centre 39.138, -75.488 — the mean of this state’s place centroids, from the US Census Bureau Gazetteer (2024). Activity is measured across a rectangle drawn around the state, so a few earthquakes just over its border are counted too.
Largest on record in and around Delaware
| Magnitude | When | Where |
|---|---|---|
| M 4.1 | 3 km NNE of Little Creek, Delaware | |
| M 2.3 | 3 km SW of Port Norris, New Jersey | |
| M 2.1 | 2 km W of Rising Sun, Maryland | |
| M 1.7 | 3 km S of Rising Sun, Maryland |
From the QuakeIndex catalogue, built from the USGS FDSN event service · inside a rectangle drawn around Delaware, which takes in some ground over its borders.
Counties in Delaware
After an earthquake here
- Report what you felt to USGS — reports go to USGS, not to us, and they are what produces the intensity maps
- What to do during and after an earthquake
- QuakeIndex does not issue warnings. For early warning, ShakeAlert reaches phones through Wireless Emergency Alerts and the MyShake app