Reviewed by USGSNew Zealand15y ago
M5.1 earthquake in Kermadec Islands, New Zealand
Sunday, November 13, 2011, 15:40:51 UTC · 29.714°S, 177.682°W
A magnitude 5.1 earthquake struck in Kermadec Islands, New Zealand on Sunday, November 13, 2011, 15:40:51 UTC, at a depth of 73.9 km (intermediate). It is the strongest earthquake within 300 km since an M5.1 on November 5, 2011.
- Magnitude
- 5.1
- Moderate · mb
- Depth
- 74 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
674 tons of TNT
That is about 1/22 of the Hiroshima bomb. It released about 1 times the energy of a magnitude 5.0.
Tectonic setting
126 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: intermediate
74 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 75 km
USGS has not published any M2.5+ earthquake within 75 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 1,785 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 · 192 km SE of this epicenter
- 8.01976 Kermadec Islands, New Zealand EarthquakeJanuary 14, 1976 · 143 km N of this epicenter
- 7.7Kermadec Islands regionOctober 20, 1986 · 219 km NE of this epicenter
- 7.6Kermadec Islands regionJuly 6, 2011 · 131 km E of this epicenter
- 7.5Kermadec Islands regionFebruary 27, 1955 · 254 km NE of this epicenter
- 7.5Kermadec Islands, New ZealandNovember 16, 1917 · 21 km SW of this epicenter
- 7.4Kermadec Islands regionOctober 21, 2011 · 161 km NE of this epicenter
- 7.4Kermadec Islands regionMay 16, 2006 · 280 km SW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 14 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700. The most severe:
- 1986M8.1
Raoul
20 Oct 1986 · 219 km away
Limited damage (under $1M)tsunami
- 1976M7.9
Kermadec Islands
14 Jan 1976 · 63 km away
Limited damage (under $1M)tsunami
- 1968M7.3
S Of, Raoul
25 Jul 1968 · 139 km away
Limited damage (under $1M)tsunami
- 1917M8.0
Kermadec Islands
1 May 1917 · 87 km away
tsunami
- 1955M7.8
Kermadec Islands
27 Feb 1955 · 285 km away
- 1976M7.8
Kermadec Islands
14 Jan 1976 · 50 km away · intensity VIII
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.