Reviewed by USGSFiji7y ago
M4.5 earthquake 225 km ENE of Levuka, Fiji
Friday, August 23, 2019, 17:22:59 UTC · 17.461°S, 178.649°W
A magnitude 4.5 earthquake struck 225 km ENE of Levuka, Fiji on Friday, August 23, 2019, 17:22:59 UTC, at a depth of 543.8 km (deep). It is the strongest earthquake within 300 km since an M4.8 on August 22, 2019.
- Magnitude
- 4.5
- Light · mb
- Depth
- 544 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 earthquakeDashed circle: 50 km aftershock search area
In context
How big was it, and why here?
Energy released
85 tons of TNT
That is about 1/178 of the Hiroshima bomb. A magnitude 5.0 releases about 6 times more energy.
Tectonic setting
174 km
from the nearest mapped plate boundary, between the Niuafo'ou and Australian plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: deep
544 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 lists 10 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M4.6 on September 18, 2019. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
- 4.0194 km ENE of Levuka, Fiji7y ago · 33 km SW of this epicenter
- 4.6224 km ENE of Levuka, Fiji7y ago · 16 km S of this epicenter
- 4.4236 km E of Levuka, Fiji7y ago · 48 km SE of this epicenter
- 4.6216 km ENE of Levuka, Fiji7y ago · 19 km S of this epicenter
- 4.3191 km ENE of Levuka, Fiji7y ago · 35 km W of this epicenter
- 4.3227 km ENE of Levuka, Fiji7y ago · 24 km S of this epicenter
- 4.3214 km ENE of Levuka, Fiji7y ago · 16 km NW of this epicenter
- 4.1241 km ENE of Levuka, Fiji7y ago · 23 km SE of this epicenter
Regional history
Past M5+ earthquakes within 300 km
USGS lists 1,223 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 · 89 km SE of this epicenter
- 7.945 km S of Levuka, FijiSeptember 6, 2018 · 240 km SW of this epicenter
- 7.8Fiji regionJanuary 1, 1919 · 215 km S of this epicenter
- 7.6178 km E of Levuka, FijiFebruary 22, 1909 · 89 km SW of this epicenter
- 7.6144 km SSW of Leava, Wallis and FutunaMay 23, 1956 · 226 km N of this epicenter
- 7.6240 km E of Levuka, FijiMarch 9, 1994 · 69 km S of this epicenter
- 7.4227 km E of Levuka, FijiAugust 21, 1910 · 41 km S of this epicenter
- 7.2Fiji regionMarch 31, 1907 · 193 km E of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 11 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700. The most severe:
- 1919M6.9
Rabi,Tunuloa Mission,Suvasavu
3 Oct 1919 · 186 km away · intensity VIII
Moderate damage ($1–5M)
- 1979M6.9
Fiji Islands
16 Nov 1979 · 162 km away
Moderate damage ($1–5M)tsunami
- 1932M6.4
Koro,Mudu,Suvasavu
8 Mar 1932 · 188 km away · intensity VII
Moderate damage ($1–5M)
- 1884
Macuata
Jan 1884 · 298 km away · intensity VII
Limited damage (under $1M)tsunami
- 2018M8.2
Fiji Islands
19 Aug 2018 · 90 km away · intensity V
tsunami
- 2018M7.9
Fiji Islands
6 Sep 2018 · 240 km away · intensity VII
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.