M 7.5 earthquake – 110 km E of ‘Ohonua, Tonga
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Local time: Sep 9, 1948 · 03:29 (UTC+12:20)
MajorShallow · 15 km
Reviewed by a seismologist
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- Magnitude
- 7.5moment magnitude (mw)
- Depth
- 15 kmShallow earthquake
- Epicenter
- -21.222, -173.891136 km from Nuku‘alofa
- Energy released
- 2.7 megatons of TNTabout 179 × Hiroshima
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- 5.4max. instrumental (MMI)
- Aftershocks
- 0M2.5+ within 145 km
- Significance
- 865USGS score, 0–1,000+
The strongest here since 1913
The last earthquake at least as strong within 300 km struck on Jun 26, 1913.
How strong was it?
Major earthquake. It released 2.7 megatons of TNT, 5,623 times the energy of a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.
The strongest earthquakes within 300 km
Since 1900, around Tonga.
- 8.0 2006 Tonga Earthquake May 3, 2006
- 8.0 Tonga Jan 4, 1903
- 7.8 159 km W of Pangai, Tonga Dec 14, 1950
- 7.8 111 km SSE of Pangai, Tonga Jun 26, 1913
- 7.6 191 km S of ‘Ohonua, Tonga Mar 19, 2009
- 7.4 103 km ESE of Neiafu, Tonga Feb 27, 1921
- 7.3 205 km ESE of Neiafu, Tonga Nov 11, 2022
- 7.3 85 km ESE of Neiafu, Tonga Jan 2, 1907