Reviewed by USGS20y ago
M4.1 earthquake in Kermadec Islands region
Monday, July 10, 2006, 05:06:21 UTC · 31.845°S, 179.920°W
A magnitude 4.1 earthquake struck in Kermadec Islands region on Monday, July 10, 2006, 05:06:21 UTC, at a depth of 270.1 km (intermediate).
- Magnitude
- 4.1
- Light · mb
- Depth
- 270 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
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
12 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
270 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 1,211 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.5Kermadec Islands, New ZealandNovember 16, 1917 · 298 km NE of this epicenter
- 7.4Kermadec Islands regionMay 16, 2006 · 58 km E of this epicenter
- 7.3Kermadec Islands, New ZealandMarch 26, 1963 · 297 km NE of this epicenter
- 7.3Kermadec Islands, New ZealandJuly 25, 1968 · 205 km NE of this epicenter
- 7.2Kermadec Islands, New ZealandFebruary 9, 1978 · 276 km NE of this epicenter
- 7.2Kermadec Islands, New ZealandJune 3, 2001 · 272 km NE of this epicenter
- 7.2Kermadec Islands, New ZealandApril 17, 1919 · 231 km NE of this epicenter
- 7.1Kermadec Islands, New ZealandJune 29, 1910 · 287 km E of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 2 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700. The most severe:
- 1968M7.3
S Of, Raoul
25 Jul 1968 · 185 km away
Limited damage (under $1M)tsunami
- 1978M7.7
S Of
9 Feb 1978 · 276 km away
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.