Reviewed by USGSNew Zealand81y ago
M6.1 earthquake 54 km NNW of Methven, New Zealand
Friday, June 28, 1946, 07:12:43 UTC · 43.179°S, 171.408°E
A magnitude 6.1 earthquake struck 54 km NNW of Methven, New Zealand on Friday, June 28, 1946, 07:12:43 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M6.5 on June 26, 1946.
- Magnitude
- 6.1
- Strong · mw
- Depth
- 15 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 earthquake
In context
How big was it, and why here?
Energy released
23 kilotons of TNT
That is about 2 times the Hiroshima bomb. It released about 48 times the energy of a magnitude 5.0.
Tectonic setting
43 km
from the nearest mapped plate boundary, between the Australian and Pacific plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
15 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 has not published any M2.5+ earthquake within 100 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 9 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.368 km S of Wakefield, New ZealandJune 16, 1929 · 197 km NE of this epicenter
- 7.030 km NW of Amberley, New ZealandMarch 9, 1929 · 86 km E of this epicenter
- 6.535 km NNW of Methven, New ZealandJune 26, 1946 · 20 km S of this epicenter
- 6.558 km SW of Wakefield, New ZealandJune 22, 1929 · 181 km NE of this epicenter
- 6.386 km NNE of Amberley, New ZealandDecember 25, 1922 · 167 km NE of this epicenter
- 6.351 km SSW of Wakefield, New ZealandJune 22, 1929 · 188 km NE of this epicenter
- 6.352 km E of Westport, New ZealandJune 19, 1929 · 179 km N of this epicenter
- 5.975 km S of Wakefield, New ZealandJuly 15, 1929 · 175 km NE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 4 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 20 recorded deaths. The most severe:
- 1929M7.5
South Island
16 Jun 1929 · 173 km away
17 deathsModerate damage ($1–5M)tsunami
- 1848M6.0
Awatere River, Marlborough
18 Oct 1848 · 271 km away
3 deathstsunami
- 1913M6.8
Tasman Sea
22 Feb 1913 · 154 km away · intensity VIII
Limited damage (under $1M)tsunami
- 1922M6.3
Se. New Zealand
25 Dec 1922 · 131 km away · intensity VII
tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.