M4.9 Earthquake 82 km SW of Kirakira, Solomon Islands — September 28, 2024
2024-09-28 15:40:48 UTC (2024-09-28) · approx. 2:40 AM UTC+11 local
Aftershock of the M5.0 mainshock.
On September 28, 2024 at 15:40 UTC, a magnitude 4.9 shallow crustal earthquake struck 82 km SW of Kirakira, Solomon Islands, at a depth of 19.1 km and coordinates -10.9898°, 161.3915°. This earthquake was detected by 97 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.0 mainshock that occurred 10 days ago 82 km SW of Kirakira, Solomon Islands. Since the mainshock, the USGS has recorded 0 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
161.3915°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.9 earthquake near Kirakira, Solomon Islands?
The magnitude 4.9 earthquake that struck 82 km SW of Kirakira, Solomon Islands on September 28, 2024 at 15:40 UTC had a depth of 19.1 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -10.9898°, 161.3915°, which is 82 km SW of Kirakira, Solomon Islands.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.0 one earlier?
No. This magnitude 4.9 earthquake is an aftershock of the larger magnitude 5.0 mainshock that occurred earlier 82 km SW of Kirakira, Solomon Islands. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
Authoritative source: USGS event page (event ID: us7000ngzw). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, September 28, 2024). M4.9 Earthquake 82 km SW of Kirakira, Solomon Islands — September 28, 2024. Retrieved December 6, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000ngzw/