Reviewed by USGSNew Zealand20y ago
M4.3 earthquake in Kermadec Islands, New Zealand
Wednesday, July 26, 2006, 21:59:34 UTC · 30.661°S, 178.909°W
A magnitude 4.3 earthquake struck in Kermadec Islands, New Zealand on Wednesday, July 26, 2006, 21:59:34 UTC, at a depth of 223.1 km (intermediate).
- Magnitude
- 4.3
- Light · mb
- Depth
- 223 km
- Intermediate
- 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
43 tons of TNT
That is about 1/354 of the Hiroshima bomb. A magnitude 5.0 releases about 11 times more energy.
Tectonic setting
37 km
from the nearest mapped plate boundary, between the Kermadec and Australian plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: intermediate
223 km
Intermediate-depth earthquakes usually break inside a plate that is sinking into the mantle. Shaking spreads over a wide area but is gentler at the epicenter than a shallow quake of the same size.
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 1,524 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.21917 Kermadec Islands, New Zealand EarthquakeMay 1, 1917 · 223 km E of this epicenter
- 8.01976 Kermadec Islands, New Zealand EarthquakeJanuary 14, 1976 · 276 km NE of this epicenter
- 7.5Kermadec Islands, New ZealandNovember 16, 1917 · 137 km NE of this epicenter
- 7.4Kermadec Islands regionMay 16, 2006 · 133 km S of this epicenter
- 7.3Kermadec Islands regionSeptember 14, 1959 · 261 km NE of this epicenter
- 7.3Kermadec Islands, New ZealandMarch 26, 1963 · 140 km NE of this epicenter
- 7.3Kermadec Islands, New ZealandJuly 25, 1968 · 75 km E of this epicenter
- 7.2Kermadec Islands, New ZealandFebruary 9, 1978 · 148 km E of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 8 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700. The most severe:
- 1976M7.9
Kermadec Islands
14 Jan 1976 · 216 km away
Limited damage (under $1M)tsunami
- 1968M7.3
S Of, Raoul
25 Jul 1968 · 51 km away
Limited damage (under $1M)tsunami
- 1917M8.0
Kermadec Islands
1 May 1917 · 245 km away
tsunami
- 1976M7.8
Kermadec Islands
14 Jan 1976 · 182 km away · intensity VIII
- 1978M7.7
S Of
9 Feb 1978 · 148 km away
- 1943M7.6
S Of
14 Sep 1943 · 197 km away
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.