M4.5 Earthquake 216 km SSW of Pelabuhanratu, Indonesia — September 18, 2026
2026-09-18 17:42:37 UTC (2026-09-18) · approx. 12:42 AM UTC+7 local
Felt by 1 person across nearby locations. Aftershock of the M5.2 mainshock.
On September 18, 2026 at 17:42 UTC, a magnitude 4.5 shallow crustal earthquake struck 216 km SSW of Pelabuhanratu, Indonesia, at a depth of 10.0 km and coordinates -8.7071°, 105.6209°. This earthquake was detected by 34 seismic stations with good location accuracy and was assigned a USGS significance rating of 312, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — 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 5.2 mainshock that occurred 23 days ago 182 km SSW of Pelabuhanratu, Indonesia. 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.
The epicenter is located in Indonesia, a region characterized by the convergence of the Indo-Australian, Eurasian, and Philippine Sea plates, forming the Sunda-Banda arc system. The nearest mapped fault system is the Sunda megathrust. View all earthquakes in Indonesia.
Learn more: Magnitude scale · Aftershock sequences
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 1 citizen response to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
105.6209°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.5 earthquake near Pelabuhanratu, Indonesia?
The magnitude 4.5 earthquake that struck 216 km SSW of Pelabuhanratu, Indonesia on September 18, 2026 at 17:42 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -8.7071°, 105.6209°, which is 216 km SSW of Pelabuhanratu, Indonesia. View all earthquakes in Indonesia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.2 one earlier?
No. This magnitude 4.5 earthquake is an aftershock of the larger magnitude 5.2 mainshock that occurred earlier 182 km SSW of Pelabuhanratu, Indonesia. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
Has Indonesia had earthquakes this big before?
The largest recorded earthquake in Indonesia was the M9.1 Indian Ocean earthquake of December 26, 2004. Today's magnitude 4.5 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us7000tidr). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 18, 2026). M4.5 Earthquake 216 km SSW of Pelabuhanratu, Indonesia — September 18, 2026. Retrieved September 26, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000tidr/