Information on the earthquake: moderate mag. Earthquake 4.8 – Indian Ocean, 151 km south of Lumajang, East Java, Indonesia, on Saturday, September 4, 2021 at 3:29 p.m. (GMT +8)
Moderate magnitude earthquake 4.8 to 10 km deep
4 Sep 07:35 UTC: First to report: BMKG after 6 minutes.
Sep 4, 7:45 AM: Magnitude recalculated from 4.7 to 4.8. Epicenter location corrected 4.4 km (2.7 mi) towards E.
Sep 4, 7:50 AM: Epicenter location corrected 5 km (3.1 mi) towards NNE.
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Date and Time: Sep 4, 2021 07:29:00 UTC –
Local time at epicenter: Saturday Sep 4, 2021 3:29 PM (GMT +8)
Magnitude: 4.8
Depth: 10.0 km
Latitude / longitude of epicenter: 9.48 ° S / 113.04 ° E↗ 
(Indian Ocean, Indonesia)
Antipode: 9.48 ° N / 66.96 ° W↗
Nearest volcano: Semeru (157 km / 98 mi)
Nearby towns and villages:
138 km (86 mi) SSO of Kencong (pop: 43,000) -> Observe the earthquakes nearby!
151 km (94 mi) south of Lumajang (pop: 123,600) -> See nearby earthquakes!
163 km (101 mi) SSO of Jember (pop: 298,600) -> Observe the earthquakes nearby!
173 km (107 mi) to SSE of Malang (pop: 746,700) -> See nearby earthquakes!
174 km (108 mi) southwest of Genteng (pop: 79,700) -> See nearby earthquakes!
181 km (113 mi) to SSE of Blitar (pop: 132,400) -> See nearby earthquakes!
187 km (116 mi) to SSE of Lawang (pop: 159,400) -> Observe the earthquakes nearby!
193 km (120 mi) south of Probolinggo (pop: 181,700) -> Observe the earthquakes nearby!
250 km (155 mi) south of Surabaya (pop: 2,374,700) -> See nearby earthquakes!
773 km (480 mi) ESE of Jakarta (pop: 8,540,100) -> Watch the earthquakes nearby!
250 km (156 mi) WW of Bali island (pop: 4,225,400) -> See nearby earthquakes!
Clouds covered
25.5 ° C (78 F), humidity: 73%, wind: 7 m / s (13 kts) from ESSMain data source: BMKG (Meteorological, Climatological and Geophysical Agency of Indonesia)
Estimated energy released: 1×1012 joules (278 megawatt hours, equivalent to 239 tonnes of TNT) Find out more
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Data for the same earthquake reported by different agencies
Info: The more agencies report the same earthquake and publish similar data, the more confidence you can have in the data. It normally takes up to a few hours for the seismic parameters to be calculated with near optimum accuracy.
| Mag. | Depth | Site | Source |
| 4.8 | 10 km | South Java, Indonesia | BMKG |
| 4.9 | 60 km | SOUTH OF JAVA, INDONESIA | EMSC |
| 4.9 | 48km | 127 km SSO of Kencong, Indonesia | USGS |
| 4.8 | 63 km | South Java, Indonesia | GFZ |
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