Reviewed by USGSTonga7y ago
M4.1 earthquake 264 km NW of Haveluloto, Tonga
Sunday, June 23, 2019, 07:45:40 UTC · 19.609°S, 177.153°W
A magnitude 4.1 earthquake struck 264 km NW of Haveluloto, Tonga on Sunday, June 23, 2019, 07:45:40 UTC, at a depth of 527.1 km (deep).
- Magnitude
- 4.1
- Light · mb
- Depth
- 527 km
- Deep
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- —
- No ShakeMap
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquake
In context
How big was it, and why here?
Energy released
21 tons of TNT
That is about 1/707 of the Hiroshima bomb. A magnitude 5.0 releases about 22 times more energy.
Tectonic setting
76 km
from the nearest mapped plate boundary, between the Niuafo'ou and Australian plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: deep
527 km
Deep earthquakes (over 300 km) happen deep inside subducting plates. They rarely cause damage, but can be felt faintly over very large distances.
Did You Feel It?
Where it was felt
No “Did You Feel It?” reports have been published for this event yet. If you felt it, you can add your report on the USGS website.
I felt it — report to USGS ↗USGS PAGER estimate
Who was exposed to shaking
USGS publishes PAGER impact estimates for significant earthquakes, usually within an hour. No PAGER estimate is available for this event.
After the main event
Aftershocks within 50 km
USGS has not published any M2.5+ earthquake within 50 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 1,961 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.22018 Fiji EarthquakeAugust 19, 2018 · 197 km NW of this epicenter
- 8.0TongaJanuary 4, 1903 · 229 km E of this epicenter
- 7.8159 km W of Pangai, TongaDecember 14, 1950 · 134 km E of this epicenter
- 7.8Fiji regionJanuary 1, 1919 · 102 km W of this epicenter
- 7.8192 km WSW of Haveluloto, TongaOctober 14, 1997 · 280 km S of this epicenter
- 7.6178 km E of Levuka, FijiFebruary 22, 1909 · 250 km NW of this epicenter
- 7.6240 km E of Levuka, FijiMarch 9, 1994 · 219 km NW of this epicenter
- 7.5262 km WNW of Haveluloto, TongaMay 21, 1962 · 62 km SW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 13 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700. The most severe:
- 2018M8.2
Fiji Islands
19 Aug 2018 · 197 km away · intensity V
tsunami
- 1937M8.1
Fiji Islands
16 Apr 1937 · 211 km away
- 1903M8.0
Tonga Islands
4 Jan 1903 · 229 km away
- 1909M7.8
Fiji Islands
22 Feb 1909 · 264 km away
- 1919M7.8
Fiji Islands
1 Jan 1919 · 102 km away
tsunami
- 1950M7.7
Tonga Islands
14 Dec 1950 · 121 km away · intensity VI
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.