QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4mb_lg

8 km NE of Bel Air North, Maryland

· 5.0 km deep · released about 120 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Harford County 9 kmCecil County 32 kmBaltimore County 33 kmBaltimore city 44 kmKent County 45 kmLancaster County 47 kmYork County 49 kmNew Castle County 57 kmCarroll County 61 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.4 (mb_lg)
Depth
5.0 km below the surface
Felt
398 reports · strongest reported intensity IV
Nearest
Harford County, 9 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 26 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 398 people have reported feeling it to USGS.

How big was it?

This earthquake released about 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 89,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.9× the energy of this one
  4. This earthquake M 2.4 about 120 lb of TNT

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 39.6177, -76.3094. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Harford County, MD 9 km (6 mi) N of here earthquakes near Harford County
Cecil County, MD 32 km (20 mi) W of here earthquakes near Cecil County
Baltimore County, MD 33 km (20 mi) NE of here earthquakes near Baltimore County
Baltimore city, MD 44 km (27 mi) NE of here earthquakes near Baltimore city
Kent County, MD 45 km (28 mi) NNW of here earthquakes near Kent County
Lancaster County, PA 47 km (29 mi) S of here earthquakes near Lancaster County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

2 earthquakes have been recorded within 50 km since this one.

  1. 1.7 3 km S of Rising Sun, Maryland
  2. 2.1 2 km W of Rising Sun, Maryland

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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.