QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

Earthquake near Dillingham, AK

USGS: 9 km NE of Portage Creek, Alaska

5:51 pm AKDT, May 30, 2019 · · 3.6 km deep · released about 15 lb of TNT

Every earthquake near Dillingham Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Bristol Bay Borough 44 kmDillingham Census Area 74 kmLake and Peninsula Borough 118 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
5:51 pm AKDT on 30 May 2019 ()
Where
49 km (31 mi) E of Dillingham, AK · earthquakes near Dillingham
Magnitude
M 1.8 (ml)
Depth
3.6 km below the surface
Felt
no reports yet
Nearest
Bristol Bay Borough, 44 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1926 days ago

A magnitude 1.8 earthquake was recorded 49 km (31 mi) E of Dillingham, AK, at 5:51 pm AKDT on 30 May 2019 (01:51 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 58.9665, -157.6081. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Bristol Bay Borough, AK 44 km (27 mi) SE earthquakes near Bristol Bay Borough
Dillingham Census Area, AK 74 km (46 mi) NNW earthquakes near Dillingham Census Area
Lake and Peninsula Borough, AK 118 km (73 mi) SE earthquakes near Lake and Peninsula Borough

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

Aftershocks so far

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

  1. 2.1 13 km SSE of Portage Creek, Alaska
  2. 1.9 27 km SSE of Portage Creek, Alaska
  3. 2.0 7 km SE of Portage Creek, Alaska
  4. 1.6 20 km W of Naknek, Alaska
  5. 1.9 20 km SW of Ekwok, Alaska
  6. 1.5 12 km E of Portage Creek, Alaska
  7. 2.0 27 km ESE of Clarks Point, Alaska
  8. 1.8 22 km SW of Levelock, Alaska
  9. 1.9 3 km W of Portage Creek, Alaska
  10. 2.5 12 km SE of Portage Creek, Alaska
  11. 1.7 15 km WNW of Naknek, Alaska
  12. 1.5 40 km S of Portage Creek, Alaska
  13. 2.2 19 km NW of Levelock, Alaska
  14. 1.8 23 km NNW of Portage Creek, Alaska
  15. 1.6 29 km WSW of South Naknek, Alaska

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.