Earthquake · reviewed by a seismologist
M 4.8mwr
2024 Tewksbury, New Jersey Earthquake
Yes. A magnitude 4.8 earthquake was recorded 2024 Tewksbury, New Jersey Earthquake, 69 km (43 mi) W of New York, NY, at 10:23 am EDT on 5 April 2024 (14:23 UTC), 2.6 km deep. 184,673 people have reported feeling it to USGS.
69 km (43 mi) W of New York, NY · 30 km (19 mi) WNW of Plainfield, NJ
- When
- Magnitude
- M 4.8 (mwr)
- Depth
- 2.6 km below the surface
- Felt
- 184,673 reports · strongest reported intensity V
- Measured shaking
- intensity VI (ShakeMap)
- USGS impact alert
- green
- Tsunami
- USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
- Nearest
- Somerset County, 19 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 81 days ago
Earthquake alerts for Califon, NJ
Get a notification in this browser when USGS records an earthquake near Califon, NJ. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.
At this magnitude and depth, people at rest would likely notice it out to about 702 km (436 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Likely felt in: Gladstone 8 km, intensity VI. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 240 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.8 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 710× the energy of this one
- Mineral, Virginia 2011 M 5.8 32× the energy of this one
- Magna, Utah 2020 M 5.7 22× the energy of this one
- This earthquake M 4.8 about 240 tons of TNT
- Around the size people start to feel M 3.0 this one released 500× more
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
Where
Epicentre 40.6963, -74.7596. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Somerset County, NJ | 19 km (12 mi) | SE | earthquakes near Somerset County |
| Hunterdon County, NJ | 19 km (12 mi) | SW | earthquakes near Hunterdon County |
| Morris County, NJ | 25 km (16 mi) | NE | earthquakes near Morris County |
| Warren County, NJ | 27 km (17 mi) | NW | earthquakes near Warren County |
| Union County, NJ | 38 km (24 mi) | E | earthquakes near Union County |
| Middlesex County, NJ | 41 km (26 mi) | SE | earthquakes near Middlesex County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
60 earthquakes have been recorded within 50 km since this one.
- 1.7 6 km ESE of Califon, New Jersey
- 1.7 1 km SW of Gladstone, New Jersey
- 2.6 1 km NW of Gladstone, New Jersey
- 1.8 6 km ESE of Califon, New Jersey
- 1.5 6 km SSE of Long Valley, New Jersey
- 1.6 6 km ESE of Califon, New Jersey
- 2.9 7 km WSW of Gladstone, New Jersey
- 1.6 7 km E of Califon, New Jersey
- 1.5 5 km SW of Gladstone, New Jersey
- 2.1 6 km W of Gladstone, New Jersey
- 1.5 5 km E of Califon, New Jersey
- 1.5 5 km NNE of Whitehouse Station, New Jersey
- 1.5 5 km N of Whitehouse Station, New Jersey
- 1.5 3 km NNE of Whitehouse Station, New Jersey
- 1.8 4 km SW of Gladstone, New Jersey
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.