Earthquakes in Mercer County, New Jersey
Too few earthquakes here to say what is "normal"
Only 118 earthquakes of M1.5 or largerhave been recorded within 100 km 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 So we do not publish one.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 Mercer County, New Jersey, 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 within 100 km
None within 100 km 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 40.282, -74.704 — the Census internal point, from the US Census Bureau Gazetteer (2024). Activity is measured within 100 km of it.
Largest on record nearby
| Magnitude | When | Where |
|---|---|---|
| M 4.8 | 2024 Tewksbury, New Jersey Earthquake | |
| M 3.7 | 7 km WSW of Gladstone, New Jersey | |
| M 3.1 | 3 km WSW of Marlboro, New Jersey | |
| M 3.0 | 0 km W of Little Ferry, New Jersey | |
| M 2.9 | 7 km WSW of Gladstone, New Jersey | |
| M 2.9 | 6 km E of Califon, New Jersey | |
| M 2.8 | 1 km N of Hillsdale, New Jersey | |
| M 2.6 | 6 km ESE of Califon, New Jersey |
From the QuakeIndex catalogue, built from the USGS FDSN event service · within 100 km of the centre above.
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