QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

Earthquake near Volcano, HI

No earthquake was likely felt in Volcano in the 24 hours to 12:46 pm HST (22:46 UTC). The last one was M 1.9, 6 km (4 mi) W, at 11:09 am HST on 11 November 2026, estimated intensity II (weak) in town. Every earthquake near Volcano

This page: a magnitude 2.9 earthquake was recorded 9 km (5 mi) southwest of Volcano, HI, at 3:25 pm HST on 4 May 2018 (01:25 UTC), 1.5 km deep.

USGS: 8 km SW of Volcano, Hawaii

40 km (25 mi) SSW of Hilo, HI

3:25 pm HST, May 4, 2018 · · 1.5 km deep · released about 780 lb of TNT

Every earthquake near Volcano Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hawaii County 33 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
3:25 pm HST on 4 May 2018 ()
Where
9 km (5 mi) southwest of Volcano, HI · earthquakes near Volcano
Hawaii today
every earthquake in Hawaii in the last 24 hours
Magnitude
M 2.9 (ml)
Depth
1.5 km below the surface
Felt
no reports yet
Nearest
Hawaii County, 33 km NW
Nearest mapped fault
Koa'e fault system, 2 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1052 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 34 km (21 mi) from the epicentre. In Volcano, 9 km away, the estimate is intensity III (weak). 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: Volcano 9 km, intensity III · Mountain View 27 km, intensity II · Pāhala 28 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 780 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 19,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 14,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.2× the energy of this one
  4. This earthquake M 2.9 about 780 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

The largest earthquake within 50 km since 2016 was M 6.9 on 2018-05-04 — about 870,000 times the energy of this one.

Before 2016, the USGS record lists 45 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.7 17 km SSW of Leilani Estates, Hawaii · 30 km E of this epicentre
  2. 6.7 Island of Hawai`i, Hawaii · 28 km E of this epicentre
  3. 6.7 22 km W of Volcano, Hawaii · 18 km WNW of this epicentre
  4. 6.4 Kaoiki area, Hawaii · 13 km WNW of this epicentre
  5. 6.2 Kilauea South Flank, Hawaii · 28 km E of this epicentre

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 19.3797, -155.2837. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Hawaii County, HI 33 km (21 mi) NW earthquakes near Hawaii 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. 2.0 10 km SW of Volcano, Hawaii
  2. 2.0 8 km WSW of Volcano, Hawaii
  3. 1.8 8 km S of Volcano, Hawaii
  4. 1.7 18 km SSE of Volcano, Hawaii
  5. 2.2 14 km WNW of Volcano, Hawaii
  6. 2.3 9 km WSW of Volcano, Hawaii
  7. 3.3 21 km S of Leilani Estates, Hawaii
  8. 3.0 13 km S of Fern Forest, Hawaii
  9. 2.6 9 km WSW of Volcano, Hawaii
  10. 2.6 15 km SSE of Fern Forest, Hawaii
  11. 2.3 18 km E of Pāhala, Hawaii
  12. 2.3 15 km E of Pāhala, Hawaii
  13. 2.8 9 km WSW of Volcano, Hawaii
  14. 2.7 16 km E of Pāhala, Hawaii
  15. 2.1 9 km WSW of Volcano, Hawaii

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.