Reviewed by USGSNew Caledonia32y ago
M4.7 earthquake 125 km NNE of Wé, New Caledonia
Tuesday, March 22, 1994, 11:51:46 UTC · 19.947°S, 167.886°E
A magnitude 4.7 earthquake struck 125 km NNE of Wé, New Caledonia on Tuesday, March 22, 1994, 11:51:46 UTC, at a depth of 35.7 km (shallow). It is the strongest earthquake within 300 km since an M4.8 on February 28, 1994.
- Magnitude
- 4.7
- Light · mb
- Depth
- 36 km
- Shallow
- 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
169 tons of TNT
That is about 1/89 of the Hiroshima bomb. A magnitude 5.0 releases about 3 times more energy.
Tectonic setting
7 km
from the nearest mapped plate boundary, between the African and South American plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
36 km
Shallow earthquakes (under 70 km) produce the strongest surface shaking for their size, so they are the ones most likely to cause damage near the epicenter.
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 1 M2.5+ earthquake within 50 km in the following 30 days; the largest was M4.2 on March 30, 1994. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 718 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.11920 Vanuatu EarthquakeSeptember 20, 1920 · 62 km E of this epicenter
- 7.999 km SW of Port-Vila, VanuatuDecember 2, 1950 · 177 km N of this epicenter
- 7.828 km ESE of Isangel, VanuatuJune 16, 1910 · 178 km E of this epicenter
- 7.663 km NW of Isangel, VanuatuOctober 14, 1913 · 145 km NE of this epicenter
- 7.447 km NW of Isangel, VanuatuOctober 11, 1992 · 136 km NE of this epicenter
- 7.363 km S of Port-Vila, VanuatuJuly 23, 1961 · 187 km N of this epicenter
- 7.247 km NNW of Isangel, VanuatuNovember 24, 1944 · 164 km NE of this epicenter
- 7.262 km NE of Isangel, VanuatuJuly 2, 1953 · 206 km NE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 23 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 26 recorded deaths. The most severe:
- 1875M8.1
Loyalty Islands: Lifou Island
28 Mar 1875 · 64 km away
26 deathsSevere damage ($5–24M)tsunami
- 1920M8.1
Loyalty Islands
20 Sep 1920 · 62 km away
Limited damage (under $1M)tsunami
- 1878M7.5
Tanna Island
10 Jan 1878 · 123 km away
Limited damage (under $1M)tsunami
- 1961M7.3
Vanuatu Islands
23 Jul 1961 · 178 km away · intensity VI
Limited damage (under $1M)tsunami
- 1913M8.1
Vanuatu Islands
14 Oct 1913 · 127 km away
- 1878M8.0
Vanuatu Islands
11 Feb 1878 · 123 km away
tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.