On Saturday Night an Unusually powerful M6.6 Earthquake struck in the Java Sea 124km from Tangerang (Indonesia).

Written by Earthquakelist.org on September 11th, 2026. Last updated September 12th, 2026.

In the night of Saturday September 12th, 2026, an unusually powerful Magnitude 6.6 earthquake hit in the Java Sea 124 kilometer from Tangerang, Indonesia. Around 450 thousand people have been exposed to shaking.

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Earthquake Summary

This earthquake hit under water in the Java Sea, 92 kilometers (57 mi) off the coast of Indonesia, 124 kilometer north of Tangerang in Banten. The center of this earthquake had a deep depth of 359 km.

Date and Time:	Sep 12, 2026 04:23 (Jakarta Time) - Sep 11, 2026 21:23 Universal Time.
Location:	124 km north of Tangerang, Banten, Indonesia. Coordinates 5°5'36"S 106°54'11"E.
Map:	Map of area around epicenter. Click to open in Google Maps.
Magnitude:	MAG 6.6 Detected by 10 stations. Maximum Error Range ±0.098 .
Depth:	359 km (223 mi) A deep depth.
Max. Intensity:	IV Light On the Modified Mercalli Scale.
Tsunami Risk:	Small (but not impossible) Tsunami Risk Mag 6.5+ earthquakes under sea may cause tsunami's, but the risk is lower as this earthquake appears not to be very shallow. Always stay cautious - More info here.

Minimal impact predicted

Based on scientific estimates by the US Geographic Survey (USGS), the risk of high fatalities for this earthquake is classified at level GREEN (low). They expect an 90% likelyhood of between 0 and 1 fatalities.

The USGS classifies the economic impact of this earthquake at level GREEN (low). They expect an 90% likelyhood of between 0 and 1 million US Dollars in economic damage and impact.

Roughly 450 thousand people exposed to shaking

An estimated 450 thousand have been exposed to shaking (An MMI or Modified Mercalli Intensity level II or higher) as a result of this earthquake according scientific estimates published by the USGS.

The highest earthquake impact level for this earthquake is IV, which corresponds with light shaking and likely no damage. Roughly 90,830 people are expected to be exposed to this level. Intensity level III was experienced by the majority of people (around 360 thousand). In their region, weak shaking and probably no damage can be expected. All exposure to shaking was within the borders of Indonesia .

Nearby towns and cities

This earthquake may have been felt in Indonesia . Located 116 kilometer (72 mi) north of the epicenter of this earthquake, Teluknaga (West Java, Indonesia) is the nearest significant population center.

Multiple large cities are in proximity of today's earthquake. Jakarta is located 125 km to the south. Bekasi is located 127 km to the south. Tangerang is located 124 km to the south.

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

Overview of nearby places

Earthquake Intensity Map

The intensity in shaking and damage by this earthquake is illustrated through the map below. The highest intensity measured for this earthquake is IV.

I Not felt

II Weak

III Weak

IV Light

V Moderate

VI Strong

VII Very Strong

VIII Severe

IX Violent

X Extreme

Shaking reported by 19 people

People that feel an earthquake may report their experience to the US Geographic Survey. Currently, 19 people have reported shaking in 16 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:

• Jakarta, Jakarta, Indonesia: 3 people.
• Bogor, Jawa Barat, Indonesia: 2 people.
• Cibadak, Jawa Barat, Indonesia: 1 person.
• Cikeruh, Jawa Barat, Indonesia: 1 person.
• Sukabumi, Jawa Barat, Indonesia: 1 person.
• Malang, Jawa Timur, Indonesia: 1 person.
• Lembang, Jawa Barat, Indonesia: 1 person.
• Bantul, Yogyakarta, Indonesia: 1 person.
• Palembang, Sumatera Selatan, Indonesia: 1 person.
• Yogyakarta, Yogyakarta, Indonesia: 1 person.

Risk of aftershocks?

This earthquake did not have any significant foreshocks nor aftershocks occurring within 100km (62 mi) of its epicenter.

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

This is an unusually powerful earthquake

No earthquake of this strength has struck this region for a long time. Our data goes back 10 years, and no earthquakes measuring a magnitude of 6.6 or higher have been detected within 300 km (186 mi) of this epicenter.

Small (but not impossible) Tsunami Risk

Tsunami's are usually triggered by shallow earthquakes occurring at a maximum depth of a 100km. Based on early data it appears this earthquake was not shallow. However this was a very strong earthquake with it's epicenter under sea. Stay very cautious and monitor advice from local authorities.

Tsunami Risk Factors

Sources

Last updated 12/09/26 03:48 (). This article is automatically generated based on available data. We keep checking multiple sources for additional information. This article gets updated as new details on this earthquake become available.

1. US Geographic Society (USGS): Earthquake us7000tgrk
2. European-Mediterranean Seismological Centre (EMSC): Earthquake 20260911_0000279
3. Geonames.org: World Cities Database
4. Google Maps: Static API
5. Earthquakelist.org: Historic Earthquakes Database

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