Reviewed by USGS20y ago
M4.6 earthquake south of the Kermadec Islands
Thursday, November 9, 2006, 11:18:27 UTC · 33.268°S, 179.260°W
A magnitude 4.6 earthquake struck south of the Kermadec Islands on Thursday, November 9, 2006, 11:18:27 UTC, at a depth of 10.0 km (shallow). It is the strongest earthquake within 300 km since an M4.9 on November 8, 2006.
- Magnitude
- 4.6
- Light · mb
- Depth
- 10 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
120 tons of TNT
That is about 1/126 of the Hiroshima bomb. A magnitude 5.0 releases about 4 times more energy.
Tectonic setting
103 km
from the nearest mapped plate boundary, between the Kermadec and Australian plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: shallow
10 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 2 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M4.5 on November 13, 2006. 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 934 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.4Kermadec Islands regionMay 16, 2006 · 162 km N of this epicenter
- 7.3Kermadec Islands, New ZealandJuly 25, 1968 · 294 km N of this epicenter
- 7.1south of the Kermadec IslandsMay 25, 1997 · 156 km NW of this epicenter
- 7.0Kermadec Islands, New ZealandMay 20, 1968 · 292 km N of this epicenter
- 6.9Kermadec Islands, New ZealandMay 20, 1968 · 299 km N of this epicenter
- 6.9Kermadec Islands regionMay 3, 1997 · 165 km N of this epicenter
- 6.9south of the Kermadec IslandsSeptember 26, 1985 · 168 km S of this epicenter
- 6.9south of the Kermadec IslandsJuly 11, 1943 · 131 km NE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 1 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 · 286 km away
Limited damage (under $1M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.