M4.2 Earthquake 117 km NNW of Hicks Bay, New Zealand — July 9, 2025
2025-07-09 23:37:36 UTC (2025-07-09) · approx. 11:37 AM UTC+12 local
On July 9, 2025 at 23:37 UTC, a magnitude 4.2 intermediate depth earthquake struck 117 km NNW of Hicks Bay, New Zealand, at a depth of 170.9 km and coordinates -36.6810°, 177.6464°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
177.6464°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.2 earthquake near Hicks Bay, New Zealand?
The magnitude 4.2 earthquake that struck 117 km NNW of Hicks Bay, New Zealand on July 9, 2025 at 23:37 UTC had a depth of 170.9 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000qbpn). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, July 9, 2025). M4.2 Earthquake 117 km NNW of Hicks Bay, New Zealand — July 9, 2025. Retrieved September 20, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000qbpn/