Written by on . Last updated April 17th, 2024.

In the early afternoon of Monday April 1st, 2024, a significant MAG-5.1 aftershock hit under land 52 kilometer from Arawa in Papua New Guinea.

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Earthquake Summary

The earthquake struck on land in Papua New Guinea, 52 kilometer (32 mi) west of Arawa in Bougainville. The center of this earthquake had an intermediate depth of 164 km.

Date and Time: Apr 1, 2024 12:39 (Bougainville Time)
- Apr 1, 2024 01:39 Universal Time.
Location: 52 km west of Arawa, Bougainville, Papua New Guinea.
Coordinates 6°15'14"S 155°5'52"E.
Map: Map of area around epicenter.
Map of area around epicenter. Click to open in Google Maps.
Magnitude: MAG 5.1
Detected by 8 stations. Maximum Error Range ±0.11 .
Depth: 164 km (102 mi)
An intermediate depth.
Tsunami Risk: Tsunami very unlikely
Tsunami's are usually caused by MAG-6.5+ earthquakes, less than 100km shallow, and with an epicenter under sea. Neither of this seems to be the case.
Always stay cautious - More info here.

Nearby towns and cities

This earthquake may have been felt in Papua New Guinea . The closest significant population center near the earthquake is Arawa in Bougainville, Papua New Guinea. Arawa is located 52 kilometer (32 mi) west of the epicenter.

Overview of nearby places

Distance Place
52 km (32 mi)
E from epicenter

Bougainville, Papua New Guinea.
Cities and Towns around the epicenter of this earthquake.

This is likely an aftershock

This earthquake was an aftershock. A larger mag. 5.1 earthquake struck 36 km (23 mi) west-southwest in advance of this 5.1 earthquake around 1 day earlier.

Overview of foreshocks and aftershocks

Classification Magnitude When Where
Main Shock M 5.1 Mar 31, 2024 09:55
(Bougainville Time)
This Earthquake
M 5.1 1 day later
Apr 1, 2024 12:39 (Bougainville Time)
36 km (23 mi)
ENE from Main Shock.
Detected MAG2.5+ earthquakes within within 100km (62 mi), that occurred in the three days before and after the main shock.

More earthquakes coming?

The risk of aftershocks decreases rapidly over time. Usually, aftershocks are at least one order of magnitude lower than a main shock.

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, 195 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 19 days.

Tsunami very unlikely

DISCLAIMER: We strongly suggest to closely monitor advice from local authorities with regards to tsunami risks. Our analysis is based on automatically collected data from external sources, and these might contain mistakes. In addition, earthquakes can cause landslides that may lead to a tsunami, or be a followed by another, potentially stonger, earthquake.

It is very unlikely that this eartquake will cause any tsunami's. The reported magnitude is lower than the MAG-6.5 strength required to cause any earthquakes. In addition, this earthquake was not very shallow and appears to have occurred under land. However always 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 on land near a coastal area (2 km from the sea). Not this earthquake.
This earthquake had a magnitude of 5.1. Earthquakes of this strength are unlikely to trigger a tsunami.
Not this earthquake.
This earthquake occurred at a depth of 164 km (102 mi). Earthquakes this deep in the earth are unlikely to trigger a tsunami.


Last updated 17/04/24 01:28 (). 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.

  1. US Geographic Society (USGS): Earthquake us7000m94s
  2. European-Mediterranean Seismological Centre (EMSC): Earthquake 20240401_0000020
  3. Geonames.org: World Cities Database
  4. Google Maps: Static API
  5. Earthquakelist.org: Historic Earthquakes Database

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