QuakeIndex

Earthquake · automatic estimate, may change

M 1.8ml

Earthquake near Fern Forest, HI

No earthquake was likely felt in Fern Forest in the 24 hours to 10:32 am HST (20:32 UTC). The last one was M 1.8, 6 km (4 mi) SSW, at 7:22 pm HST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Fern Forest

This page: a magnitude 1.8 earthquake was recorded 14 km (8 mi) south of Fern Forest, HI, at 11:07 pm HST on 28 April 2019 (09:07 UTC), 3.6 km deep. The magnitude and location are an automatic first estimate and may change.

USGS: 13 km S of Fern Forest, Hawaii

39 km (24 mi) S of Hilo, HI

11:07 pm HST, Apr 28, 2019 · · 3.6 km deep · released about 17 lb of TNT

Every earthquake near Fern Forest Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hawaii County 46 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
11:07 pm HST on 28 April 2019 ()
Where
14 km (8 mi) south of Fern Forest, HI · earthquakes near Fern Forest
Hawaii today
every earthquake in Hawaii in the last 24 hours
Magnitude
M 1.8 (ml)
Depth
3.6 km below the surface
Felt
no reports yet
Nearest
Hawaii County, 46 km NW
Nearest mapped fault
Hilina fault system, 3 km from its surface trace — near is not the same as on
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 2755 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 14 km (9 mi) from the epicentre. In Fern Forest, 14 km away, the estimate is intensity II (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.

Earthquakes near other towns within 30 km: Volcano, Eden Roc, Fern Acres, Hawaiian Acres, Mountain View, Ainaloa.

How big was it?

This earthquake released about 17 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 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 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 39,000,000 times the energy of this one.

Before 2016, the USGS record lists 44 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.7 17 km SSW of Leilani Estates, Hawaii · 16 km E of this epicentre
  2. 6.7 Island of Hawai`i, Hawaii · 14 km E of this epicentre
  3. 6.7 22 km W of Volcano, Hawaii · 33 km WNW of this epicentre
  4. 6.4 Kaoiki area, Hawaii · 28 km WNW of this epicentre
  5. 6.2 Kilauea South Flank, Hawaii · 14 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 19.3438, -155.1517. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Hawaii County, HI 46 km (29 mi) NW earthquakes near Hawaii County

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

Aftershocks so far

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

  1. 1.9 5 km WSW of Volcano, Hawaii
  2. 1.7 5 km SW of Volcano, Hawaii
  3. 1.9 5 km SW of Volcano, Hawaii
  4. 1.9 6 km SW of Volcano, Hawaii
  5. 1.7 27 km E of Honaunau-Napoopoo, Hawaii
  6. 1.9 4 km S of Volcano, Hawaii
  7. 1.8 27 km E of Honaunau-Napoopoo, Hawaii
  8. 2.6 9 km ENE of P?hala, Hawaii
  9. 1.7 2 km SE of P?hala, Hawaii
  10. 2.2 12 km S of Fern Forest, Hawaii
  11. 1.7 1 km NE of P?hala, Hawaii
  12. 1.8 14 km S of Volcano, Hawaii
  13. 1.9 6 km SW of Volcano, Hawaii
  14. 1.8 2 km SE of Pāhala, HI
  15. 1.9 25 km E of P?hala, 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.