On Friday Afternoon a Significant M5.2 AFTERSHOCK struck in the Indian Ocean near Purwokerto (Indonesia).

Written by Earthquakelist.org on September 4th, 2026. Last updated September 30th, 2026.

A significant M5.2 aftershock struck in the Indian Ocean 71 kilometer from Purwokerto, Indonesia around noon of Friday September 4th, 2026.

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Earthquake Summary

This earthquake hit under water in the Indian Ocean, 36 kilometers (22 mi) off the coast of Indonesia, 71 kilometer south of Purwokerto in Central Java. The center of this earthquake had an intermediate depth of 79 km.

Date and Time:	Sep 4, 2026 12:05 (Jakarta Time) - Sep 4, 2026 05:05 Universal Time.
Location:	71 km south of Purwokerto, Central Java, Indonesia. Coordinates 8°1'59"S 109°2'54"E.
Map:	Map of area around epicenter. Click to open in Google Maps.
Magnitude:	MAG 5.2 Detected by 95 stations. Maximum Error Range ±0.059 .
Depth:	79 km (49 mi) An intermediate depth.
Tsunami Risk:	Low tsunami risk Earthquakes under MAG-6.5 do not usually cause tsunami's. Always stay cautious - More info here.

Nearby towns and cities

This earthquake may have been felt in Indonesia . The closest significant population center near the earthquake is Kroya in Central Java, Indonesia. Kroya is located 50 kilometer (31 mi) southwest of the epicenter.

Major cities near this earthquake: Bandung is located 201 km to the northwest. Semarang is located 190 km to the north-east. Yogyakarta is located 147 km to the east.

An overview of nearby towns and cities is available in the overview below.

Overview of nearby places

Shaking reported by 5 people

People that feel an earthquake may report their experience to the US Geographic Survey. Currently, 5 people have reported shaking in 5 places, all within Indonesia.We keep updating this article as more ground reports become available. You may report that you felt this earthquake here.

Places with most reports:

• Kadungora, Jawa Barat, Indonesia: 1 person.
• Banyumas, Jawa Tengah, Indonesia: 1 person.
• Purwokerto, Jawa Tengah, Indonesia: 1 person.
• Karawang, Jawa Barat, Indonesia: 1 person.
• Kebumen, Jawa Tengah, Indonesia: 1 person.

This is likely an aftershock

Approximately 9 sec before this earthquake hit, a larger 5.2 magnitude earthquake struck 17 km (11 mi) east of this one. For that reason, we classify the Mag. 5.2 earthquake as an aftershock.

Overview of foreshocks and aftershocks

More earthquakes coming?

Aftershocks are usually at least 1 order of magnitude less strong than main shocks. The more time passes, the smaller the chance and likely strength of any potential aftershocks.

The chance that a significant earthquake like this one is followed by an even larger earthquake is not so large. On average, scientists estimate a 94% chance that a major earthquake will not be followed by an even larger one. It is still adviced to be aware of this risk

Earthquakes like this happen often in the region

Earthquakes of this strength are very common in the region. In total, 19 earthquakes with a magnitude of 5.2 or higher have been registered within 300km (186 mi) of this epicenter in the past 10 years. This comes down to an average of once every 6 months.

Low tsunami risk

Based on early data it appears this earthquake was not strong enough (lower than MAG-6.5) to be likely to cause destructive tsunami's. However this earthquake appeared to have hit at a shallow depth under sea, so stay cautious and monitor advice from local authorities.

Tsunami Risk Factors

Sources

Last updated 30/09/26 08:48 (). This article contains currently available information about the earthquake and is automatically composed. We continue to update this article up to a few days after the earthquake occurred.

1. European-Mediterranean Seismological Centre (EMSC): Earthquake 20260904_0000056
2. Geonames.org: World Cities Database
3. Google Maps: Static API
4. Earthquakelist.org: Historic Earthquakes Database

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