Earthquake · reviewed by a seismologist
M 2.0md
Earthquake near Hilo, HI
No earthquake was likely felt in Hilo in the 24 hours to 12:29 am HST (10:29 UTC). The last one was M 3.1, 41 km (25 mi) S, at 3:09 pm HST on 12 October 2026, estimated intensity II (weak) in town; 6 felt reports to USGS. Every earthquake near Hilo
This page: a magnitude 2.0 earthquake was recorded 19 km (11 mi) northwest of Hilo, HI, at 4:36 am HST on 28 July 2021 (14:36 UTC), 39 km deep.
USGS: 7 km W of Honomu, Hawaii
23 km (14 mi) NNW of Hilo, HI
- When
- 4:36 am HST on 28 July 2021 ()
- Where
- 19 km (11 mi) northwest of Hilo, HI · earthquakes near Hilo
- Hawaii today
- every earthquake in Hawaii in the last 24 hours
- Magnitude
- M 2.0 (md)
- Depth
- 39 km below the surface
- Felt
- no reports yet
- Nearest
- Hawaii County, 44 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1935 days ago
Earthquake alerts for Hilo, HI
Get a notification in this browser when USGS records an earthquake near Hilo, HI. 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 minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth it was probably too small to be felt, even directly above it. In Hilo, 19 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: Pepeekeo, Pāpa‘ikou, Laupāhoehoe, Wainaku.
How big was it?
This earthquake released about 33 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 450,000× the energy of this one
- Magna, Utah 2020 M 5.7 320,000× the energy of this one
- Around the size people start to feel M 3.0 29× the energy of this one
- This earthquake M 2.0 about 33 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 4.9 on 2019-11-11 — about 22,000 times the energy of this one.
Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:
- 6.2 3 km WSW of Honomu, Hawaii · 4 km E of this epicentre
- 5.6 6 km NNW of Volcano, Hawaii · 41 km S 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 19.8660, -155.1925. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Hawaii County, HI | 44 km (27 mi) | SW | earthquakes near Hawaii County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
28 earthquakes have been recorded within 50 km since this one.
- 1.8 24 km WNW of Volcano, Hawaii
- 2.2 5 km W of Paukaa, Hawaii
- 2.4 7 km W of Mountain View, Hawaii
- 1.7 6 km S of Honoka‘a, Hawaii
- 2.1 9 km SW of Pa‘auilo, Hawaii
- 2.8 21 km WNW of Mountain View, Hawaii
- 2.2 9 km N of Volcano, Hawaii
- 1.8 6 km N of Volcano, Hawaii
- 1.8 22 km WNW of Volcano, Hawaii
- 2.5 15 km SE of Waimea, Hawaii
- 2.1 24 km SSW of Pa‘auilo, Hawaii
- 2.0 9 km NNW of Volcano, Hawaii
- 2.3 11 km W of Honomu, Hawaii
- 1.9 6 km W of Volcano, Hawaii
- 2.4 4 km NNW of Mountain View, 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
- 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.