M6.3 earthquake 252 km E of Tadine, New Caledonia

Friday, May 7, 2004, 01:26:42 UTC · 21.988°S, 170.276°E

A magnitude 6.3 earthquake struck 252 km E of Tadine, New Caledonia on Friday, May 7, 2004, 01:26:42 UTC, at a depth of 14.0 km (shallow). It is the strongest earthquake within 300 km since an M6.3 on April 15, 2004.

Magnitude: 6.3; Strong · mwc
Depth: 14 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: 100 km aftershock search area

In context

How big was it, and why here?

Energy released

43 kilotons of TNT

That is about 3 times the Hiroshima bomb. It released about 89 times the energy of a magnitude 5.0.

Tectonic setting

60 km

from the nearest mapped plate boundary, between the New Hebrides and Australian plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.

Depth: shallow

14 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 100 km

USGS lists 10 M2.5+ earthquakes within 100 km in the following 30 days; the largest was M5.0 on May 25, 2004. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.

Time after the mainshock on a logarithmic scale (first hours stretched), magnitude on the vertical axis. M2.5+ events from USGS.

Regional history

Past M5+ earthquakes within 300 km

USGS lists 885 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

History · NOAA

Deadliest earthquakes in this area

NOAA’s significant-earthquake database lists 12 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 · 288 km away
26 deathsSevere damage ($5–24M)tsunami
1901M7.9
Loyalty Islands
9 Aug 1901 · 28 km away
Moderate damage ($1–5M)tsunami
1920M8.1
Loyalty Islands
20 Sep 1920 · 291 km away
Limited damage (under $1M)tsunami
1995M7.7
Noumea; Vanuatu: Port-Vila
16 May 1995 · 120 km away · intensity III
tsunami
1910M7.5
Vanuatu Islands
1 Jun 1910 · 258 km away
1928M7.5
Loyalty Islands
16 Mar 1928 · 23 km away

NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.

Nearby trackers