Reviewed by USGSSolomon Islands99y ago
M6.9 earthquake 212 km S of Lata, Solomon Islands
Saturday, September 22, 1928, 07:31:29 UTC · 12.643°S, 165.870°E
A magnitude 6.9 earthquake struck 212 km S of Lata, Solomon Islands on Saturday, September 22, 1928, 07:31:29 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M7.0 on October 15, 1921.
- Magnitude
- 6.9
- 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
388 kilotons of TNT
That is about 26 times the Hiroshima bomb. It released about 813 times the energy of a magnitude 5.0.
Tectonic setting
0 km
from the nearest mapped plate boundary, between the Pacific and Australian 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 24 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.344 km SSW of Sola, VanuatuJanuary 5, 1915 · 239 km SE of this epicenter
- 7.379 km WSW of Sola, VanuatuAugust 6, 1912 · 189 km SE of this epicenter
- 7.256 km N of Port-Olry, VanuatuNovember 26, 1910 · 246 km SE of this epicenter
- 7.0143 km NNW of Sola, VanuatuOctober 15, 1921 · 117 km E of this epicenter
- 7.046 km WNW of Port-Olry, VanuatuApril 10, 1909 · 259 km S of this epicenter
- 7.045 km E of Lata, Solomon IslandsJune 20, 1914 · 213 km N of this epicenter
- 6.955 km SSW of Sola, VanuatuJuly 11, 1911 · 238 km SE of this epicenter
- 6.896 km W of Lata, Solomon IslandsAugust 23, 1918 · 231 km NW 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:
- 1910M7.2
Espiritu Santo
10 Nov 1910 · 166 km away
Moderate damage ($1–5M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.