In the late afternoon of Monday September 28th, 2026, a shallow and significant M5.1 aftershock hit in the Coral Sea 247 kilometer from Nouméa, New Caledonia.
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Earthquake Summary
This earthquake hit under water in the Coral Sea, 57 kilometers (36 mi) off the coast of New Caledonia, 247 kilometer north-east of Nouméa in South Province. The center of this earthquake had a very shallow depth of 10 km. Shallow earthquakes usually have a larger impact than earthquakes deep in the earth.
| Date and Time: | Sep 28, 2026 16:28 (Noumea Time) - Sep 28, 2026 05:28 Universal Time. |
|---|---|
| Location: | 247 km NE of Nouméa, South Province, New Caledonia. Coordinates 21°12'23"S 168°32'45"E. |
| Map: |  Map of area around epicenter. Click to open in Google Maps. |
| Magnitude: | MAG 5.1 Detected by 33 stations. Maximum Error Range ±0.099 . |
| Depth: | 10 km (6 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 New Caledonia . Mont-Dore in South Province, New Caledonia is the nearest significant place from the epicenter. The earthquake occurred 236 kilometer (147 mi) north-east of Mont-Dore.
Overview of nearby places
| Distance | Place |
|---|---|
| 236 km (147 mi) SW from epicenter |
Mont-Dore South Province, New Caledonia. |
| 240 km (149 mi) SW from epicenter |
Dumbéa South Province, New Caledonia. |
| 247 km (153 mi) SW from epicenter |
Nouméa South Province, New Caledonia. |
This is likely an aftershock
This earthquake is likely an aftershock of the MAG-6.6 earthquake that struck 2 days earlier. That main earthquake hit 12 km (8 mi) south-east of the epicenter of this MAG-5.1 aftershock.
Overview of foreshocks and aftershocks
| Classification | Magnitude | When | Where |
|---|---|---|---|
| Main Shock | M 6.6 |
Sep 26, 2026 08:23 (Noumea Time) | - |
| Aftershock | M 5.1 |
45 mins later Sep 26, 2026 09:07 (Noumea Time) | 5 km (2.9 mi) NW from Main Shock. |
| Aftershock | M 4.9 |
2 hrs later Sep 26, 2026 10:32 (Noumea Time) | 19 km (12 mi) NW from Main Shock. |
| Aftershock | M 5.5 |
2 hrs later Sep 26, 2026 10:39 (Noumea Time) | 19 km (12 mi) SW from Main Shock. |
| Aftershock | M 5.4 |
2 hrs later Sep 26, 2026 10:52 (Noumea Time) | 21 km (13 mi) NW from Main Shock. |
| Aftershock | M 5.3 |
4 hrs later Sep 26, 2026 12:10 (Noumea Time) | 25 km (15 mi) W from Main Shock. |
| Aftershock | M 4.7 |
4 hrs later Sep 26, 2026 12:17 (Noumea Time) | 0.5 km (0.3 mi) NE from Main Shock. |
| Aftershock | M 5.1 |
8 hrs later Sep 26, 2026 16:50 (Noumea Time) | 23 km (14 mi) W from Main Shock. |
| Aftershock | M 5.1 |
10 hrs later Sep 26, 2026 18:08 (Noumea Time) | 23 km (14 mi) NW from Main Shock. |
| Aftershock | M 5.0 |
10 hrs later Sep 26, 2026 18:22 (Noumea Time) | 8 km (5 mi) N from Main Shock. |
| Aftershock | M 5.0 |
11 hrs later Sep 26, 2026 19:24 (Noumea Time) | 12 km (7 mi) NW from Main Shock. |
| Aftershock | M 4.7 |
12 hrs later Sep 26, 2026 19:54 (Noumea Time) | 31 km (19 mi) N from Main Shock. |
| Aftershock | M 4.7 |
12 hrs later Sep 26, 2026 20:07 (Noumea Time) | 15 km (9 mi) NW from Main Shock. |
| Aftershock | M 4.8 |
12 hrs later Sep 26, 2026 20:08 (Noumea Time) | 33 km (20 mi) N from Main Shock. |
| Aftershock | M 4.8 |
12 hrs later Sep 26, 2026 20:10 (Noumea Time) | 15 km (10 mi) NW from Main Shock. |
| Aftershock | M 4.9 |
13 hrs later Sep 26, 2026 21:21 (Noumea Time) | 15 km (10 mi) NW from Main Shock. |
| Aftershock | M 4.7 |
15 hrs later Sep 26, 2026 23:11 (Noumea Time) | 10 km (6 mi) W from Main Shock. |
| Aftershock | M 5.0 |
15 hrs later Sep 26, 2026 23:14 (Noumea Time) | 24 km (15 mi) NW from Main Shock. |
| Aftershock | M 5.2 |
15 hrs later Sep 26, 2026 23:14 (Noumea Time) | 31 km (19 mi) W from Main Shock. |
| Aftershock | M 4.8 |
16 hrs later Sep 27, 2026 00:48 (Noumea Time) | 27 km (17 mi) N from Main Shock. |
| Aftershock | M 5.1 |
18 hrs later Sep 27, 2026 02:01 (Noumea Time) | 11 km (7 mi) S from Main Shock. |
| Aftershock | M 4.8 |
19 hrs later Sep 27, 2026 03:06 (Noumea Time) | 19 km (12 mi) S from Main Shock. |
| Aftershock | M 4.8 |
21 hrs later Sep 27, 2026 05:25 (Noumea Time) | 8 km (5 mi) SW from Main Shock. |
| Aftershock | M 5.0 |
1 day later Sep 27, 2026 12:18 (Noumea Time) | 22 km (13 mi) SW from Main Shock. |
| Aftershock | M 5.1 |
1 day later Sep 27, 2026 13:22 (Noumea Time) | 10 km (6 mi) E from Main Shock. |
| Aftershock | M 5.0 |
2 days later Sep 27, 2026 21:06 (Noumea Time) | 18 km (11 mi) N from Main Shock. |
| Aftershock | M 4.8 |
2 days later Sep 28, 2026 11:47 (Noumea Time) | 17 km (10 mi) S from Main Shock. |
| Aftershock | M 5.1 |
2 days later Sep 28, 2026 14:15 (Noumea Time) | 34 km (21 mi) N from Main Shock. |
| Aftershock | M 5.3 |
2 days later Sep 28, 2026 14:25 (Noumea Time) | 28 km (17 mi) W from Main Shock. |
| Aftershock This Earthquake |
M 5.1 |
2 days later Sep 28, 2026 16:28 (Noumea Time) | 12 km (8 mi) NW from Main Shock. |
| Aftershock | M 4.6 |
2 days later Sep 28, 2026 16:42 (Noumea Time) | 23 km (14 mi) W from Main Shock. |
| Aftershock | M 4.9 |
2 days later Sep 28, 2026 16:42 (Noumea Time) | 41 km (25 mi) W from Main Shock. |
| Aftershock | M 5.2 |
2 days later Sep 28, 2026 16:45 (Noumea Time) | 21 km (13 mi) NW 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.
It's always adviced to be cautious of the risk of a larger shock following any significant earthquake, however this risk is fairly small. There is a roughly 94 percent change that no larger main shock will follow in the days following this earthquake.
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. In total, 237 earthquakes with a magnitude of 5.1 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 15 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 5.1. Earthquakes of this strength are unlikely to trigger a tsunami. |
This earthquake occurred at a depth of of 10 km (6 mi). Earthquakes this shallow could trigger a tsunami. |
Sources
Last updated 28/09/26 22:28 (). As more information on this earthquake becomes available this article will be updated. This article is automatically composed based on data originating from multiple sources.
- US Geographic Society (USGS): Earthquake us6000ty33
- European-Mediterranean Seismological Centre (EMSC): Earthquake 20260928_0000080
- Geonames.org: World Cities Database
- Google Maps: Static API
- Earthquakelist.org: Historic Earthquakes Database
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