In the morning of Monday June 30th, 2025, a shallow Magnitude 4.9 earthquake hit in the Andaman Or Burma Sea 281 kilometer from Port Blair, India.
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Earthquake Summary
This earthquake hit under water in the Andaman Or Burma Sea, 135 kilometers (84 mi) off the coast of India, 281 kilometer south-southeast of Port Blair in Andaman and Nicobar. The center of this earthquake had a very shallow depth of 12 km. Shallow earthquakes usually have a larger impact than earthquakes deep in the earth.
| Date and Time: | Jun 30, 2025 10:09 (Kolkata Time) - Jun 30, 2025 04:39 Universal Time. |
|---|---|
| Location: | 281 km SSE of Port Blair, Andaman and Nicobar, India. Coordinates 9°27'0"N 93°59'27"E. |
| Map: |  Map of area around epicenter. Click to open in Google Maps. |
| Magnitude: | MAG 4.9 Detected by 14 stations. Maximum Error Range ±0.083 . |
| Depth: | 12 km (8 mi) A very shallow 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 India . Located 281 kilometer (175 mi) south-southeast of the epicenter of this earthquake, Port Blair (Andaman and Nicobar, India) is the nearest significant population center.
Overview of nearby places
| Distance | Place |
|---|---|
| 281 km (175 mi) NNW from epicenter |
Port Blair Andaman and Nicobar, India. |
9 Aftershocks detected
This main shock was followed by 9 smaller aftershocks. At a distance of 11 km (7 mi) south-southeast of this earthquake, an aftershock struck 3 days later. It measured a magnitude of 5
This main shock was prefaced by 16 smaller foreshocks. A 5.4 magnitude earthquake hit 3 days earlier nearby.
Overview of foreshocks and aftershocks
| Classification | Magnitude | When | Where |
|---|---|---|---|
| Foreshock | M 4.1 |
3 days earlier Jun 24, 2025 20:59 (Kolkata Time) | 25 km (15 mi) SSE from Main Shock. |
| Foreshock | M 4.5 |
3 days earlier Jun 24, 2025 21:01 (Kolkata Time) | 22 km (14 mi) SE from Main Shock. |
| Foreshock | M 4.3 |
3 days earlier Jun 24, 2025 21:39 (Kolkata Time) | 19 km (12 mi) SE from Main Shock. |
| Foreshock | M 4.6 |
3 days earlier Jun 25, 2025 01:43 (Kolkata Time) | 23 km (14 mi) SSE from Main Shock. |
| Foreshock | M 4.8 |
3 days earlier Jun 25, 2025 05:21 (Kolkata Time) | 16 km (10 mi) ENE from Main Shock. |
| Foreshock | M 4.5 |
3 days earlier Jun 25, 2025 05:23 (Kolkata Time) | 16 km (10 mi) SSW from Main Shock. |
| Foreshock | M 5.4 |
3 days earlier Jun 25, 2025 07:03 (Kolkata Time) | 6 km (3 mi) SE from Main Shock. |
| Foreshock | M 4.7 |
3 days earlier Jun 25, 2025 07:09 (Kolkata Time) | 17 km (11 mi) SE from Main Shock. |
| Foreshock | M 4.5 |
2 days earlier Jun 25, 2025 09:38 (Kolkata Time) | 13 km (8 mi) E from Main Shock. |
| Foreshock | M 4.9 |
2 days earlier Jun 25, 2025 15:29 (Kolkata Time) | 17 km (11 mi) SSE from Main Shock. |
| Foreshock | M 4.6 |
2 days earlier Jun 25, 2025 23:07 (Kolkata Time) | 33 km (20 mi) SSW from Main Shock. |
| Foreshock | M 4.3 |
2 days earlier Jun 26, 2025 01:30 (Kolkata Time) | 29 km (18 mi) SSW from Main Shock. |
| Foreshock | M 4.5 |
1 day earlier Jun 26, 2025 17:22 (Kolkata Time) | 21 km (13 mi) SE from Main Shock. |
| Foreshock | M 4.3 |
20 hrs earlier Jun 27, 2025 00:41 (Kolkata Time) | 16 km (10 mi) E from Main Shock. |
| Foreshock | M 4.3 |
7 hrs earlier Jun 27, 2025 13:25 (Kolkata Time) | 20 km (13 mi) SSE from Main Shock. |
| Foreshock | M 4.7 |
11 mins earlier Jun 27, 2025 20:17 (Kolkata Time) | 38 km (23 mi) S from Main Shock. |
| Main Shock | M 5.0 |
Jun 27, 2025 20:28 (Kolkata Time) | - |
| Aftershock | M 4.5 |
1 day later Jun 29, 2025 05:04 (Kolkata Time) | 53 km (33 mi) S from Main Shock. |
| Aftershock | M 4.5 |
1 day later Jun 29, 2025 05:04 (Kolkata Time) | 14 km (9 mi) SSW from Main Shock. |
| Aftershock | M 4.4 |
1 day later Jun 29, 2025 06:58 (Kolkata Time) | 30 km (19 mi) S from Main Shock. |
| Aftershock | M 4.6 |
1 day later Jun 29, 2025 07:07 (Kolkata Time) | 23 km (14 mi) SE from Main Shock. |
| Aftershock | M 4.3 |
2 days later Jun 29, 2025 12:46 (Kolkata Time) | 29 km (18 mi) SE from Main Shock. |
| Aftershock | M 5.0 |
3 days later Jun 30, 2025 11:22 (Kolkata Time) | 11 km (7 mi) SSE from Main Shock. |
| Aftershock | M 4.9 |
3 days later Jun 30, 2025 12:06 (Kolkata Time) | 18 km (11 mi) SSE from Main Shock. |
| Aftershock | M 4.5 |
3 days later Jul 1, 2025 04:52 (Kolkata Time) | 18 km (11 mi) ENE from Main Shock. |
| Aftershock | M 4.6 |
4 days later Jul 2, 2025 07:22 (Kolkata Time) | 15 km (9 mi) SE from Main Shock. |
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
Read: How to Stay Safe during an Earthquake (cdc.gov).Earthquakes like this happen often in the region
Earthquakes of this strength are very common in the region. This is the strongest earthquake to hit since June 27th, 2025, when a 5 magnitude earthquake hit 14 km (9 mi) further west. An even stronger magnitude 6.6 earthquake struck on November 8th, 2015.
In total, 148 earthquakes with a magnitude of 4.9 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 25 days.
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
| Factor | Under Sea? | MAG-6.5 or stronger? | Shallow depth? |
|---|---|---|---|
| Explanation | Almost all tsunami's are caused by earthquakes with their epicenter under sea or very near the sea. However stay cautious in coastal areas as earthquakes on land may cause landslides into sea, potentially still causing a local tsunami. | Under MAG 6.5: Very unlikely to cause a tsunami. MAG 6.5 to 7.5: Destructive tsunami's do occur, but are uncommon. Likely to observe small sea level changes. MAG 7.6+: Earthquakes with these magnitudes might produce destructive tsunami's. |
Most destructive tsunami's are caused by shallow earthquakes with a depth between 0 and 100km under the surface of the earth. Deeper tsunami's are unlikely to displace to ocean floor. |
| This Earthquake | This earthquake appears to have struck under the sea. | Not this earthquake. This earthquake had a magnitude of 4.9. Earthquakes of this strength are unlikely to trigger a tsunami. |
This earthquake occurred at a depth of of 12 km (8 mi). Earthquakes this shallow could trigger a tsunami. |
Sources
Last updated 19/07/25 00:38 (). 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.
- US Geographic Society (USGS): Earthquake us7000q9nl
- European-Mediterranean Seismological Centre (EMSC): Earthquake 20250630_0000054
- Geonames.org: World Cities Database
- Google Maps: Static API
- Earthquakelist.org: Historic Earthquakes Database
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