In the early morning of Sunday March 24th, 2024, a strong Magnitude 6.9 earthquake hit under land 81 kilometer from Wewak in Papua New Guinea. The USGS has indicated there is a potential risk at tsunami's following this earthquake. Another country near the epicenter is Indonesia.
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Earthquake Summary
The earthquake struck on land in Papua New Guinea, 81 kilometer (50 mi) southwest of Wewak in East Sepik. The center of this earthquake had a quite shallow depth of 37 km. Shallow earthquakes usually have a larger impact than earthquakes deep in the earth.
Date and Time: | Mar 24, 2024 06:22 (Port Moresby Time) - Mar 23, 2024 20:22 Universal Time. |
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Location: | 81 km SW of Wewak, East Sepik, Papua New Guinea. Coordinates 4°6'56"S 143°10'12"E. |
Map: | Map of area around epicenter. Click to open in Google Maps. |
Magnitude: | MAG 6.9 Detected by 8 stations. Maximum Error Range ±0.047 . |
Depth: | 37 km (23 mi) A quite shallow depth. |
Max. Intensity: | VIII
Severe On the Modified Mercalli Scale. |
Tsunami Risk: | Potential tsunami risk The USGS has indicated there is a potential risk at tsunami's following this earthquake. Always stay cautious - More info here. |
Potential tsunami risk
There is a potential tsunami risk in the aftermath of this earthquake, immediately evacuate to higher grounds away from coastal areas and monitor advice from local authorities. The US Geographic Survey organization has indicated a potential risk for tsunami's following this earthquake.
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 | Not this earthquake. This earthquake appears to have struck on land far from any coast. |
This earthquake had a magnitude of 6.9. Earthquakes of this strength could trigger a tsunami. | This earthquake occurred at a depth of of 37 km (23 mi). Earthquakes this shallow could trigger a tsunami. |
Significant impact predicted
Based on scientific estimates by the US Geographic Survey (USGS), the risk of high fatalities for this earthquake is classified at level YELLOW (significant). They expect an 50% likelyhood of between 0 and 1 fatalities, and a 99% chance that the number of fatalities falls no higher than 100.
The USGS classifies the economic impact of this earthquake at level YELLOW (significant). They expect an 50% likelyhood of between 0 and 1 million US Dollars in economic damage and impact, and a 99% chance that the economic impact of this earthquake falls no higher than 100 million USD.
Roughly 3.3 million people exposed to shaking
An estimated 3.3 million 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.
An estimated 590 people were exposed to level VIII. At this level, severe shaking and likely moderate to heavy damage can be expected. Intensity level IV was experienced by the majority of people (around 2.6 million). In their region, light shaking and likely no damage can be expected.
People in 2 countries have been exposed to shaking. Roughly 3.3 million people were exposed to shaking in Papua New Guinea , with level VIII (severe shaking, likely moderate to heavy damage) as the highest recorded. Shaking was experienced by inhabitants of Indonesia too.
People | MMI Level | Shaking | Damage |
---|---|---|---|
0 | I |
Not noticable | None |
0 | II |
Very weak | None |
94,410 | III |
Weak | Probably none |
2,583,000 | IV |
Light | Likely none |
190,200 | V |
Moderate | Very light |
232,200 | VI |
Strong | Light |
197,800 | VII |
Very Strong | Moderate |
590 | VIII |
Severe | Moderate to heavy |
0 | IX |
Violent | Heavy |
0 | X |
Extreme | Very heavy |
Nearby towns and cities
2 countries can be found within 300km of the epicenter of this earthquake: Papua New Guinea and Indonesia .
The closest significant population center near the earthquake is Wewak in East Sepik, Papua New Guinea. Wewak is located 81 kilometer (50 mi) southwest of the epicenter. The intensity of shaking and damage in Wewak is estimated to be around level VI on the Modified Mercalli Intensity scale (strong shaking, probably light damage).
The table below provides an overview of all places in proximity of today's earthquake. Where available, the estimated intensity on the Modified Mercalli Intensity Scale in each place is included. Places where this information is omitted likely experienced little impact.
Overview of nearby places
Distance | Place | Intensity (MMI) |
---|---|---|
81 km (50 mi) NE from epicenter |
Wewak East Sepik, Papua New Guinea. |
VI
Strong |
227 km (141 mi) SSE from epicenter |
Mount Hagen Western Highlands, Papua New Guinea. |
IV
Light |
232 km (144 mi) SSE from epicenter |
Mendi Southern Highlands, Papua New Guinea. |
IV
Light |
315 km (196 mi) ESE from epicenter |
Madang Madang, Papua New Guinea. |
|
324 km (201 mi) WNW from epicenter |
Jayapura Papua, Indonesia. |
|
328 km (204 mi) WNW from epicenter |
Abepura Papua, Indonesia. |
|
329 km (204 mi) SE from epicenter |
Goroka Eastern Highlands, Papua New Guinea. |
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 VIII.
Shaking reported by 23 people
People that feel an earthquake may report their experience to the US Geographic Survey. Currently, 23 people have reported shaking in 10 places, all within Papua New Guinea.We keep updating this article as more ground reports become available. You may report that you felt this earthquake here.
Places with most reports:
- Mount Hagen, Western Highlands, Papua New Guinea: 6 people.
- Tari, Southern Highlands, Papua New Guinea: 4 people.
- Goroka, Eastern Highlands, Papua New Guinea: 3 people.
- Ambunti, East Sepik, Papua New Guinea: 2 people.
- Wewak, East Sepik, Papua New Guinea: 2 people.
- Kundiawa, Simbu, Papua New Guinea: 2 people.
- Kainantu, Eastern Highlands, Papua New Guinea: 1 person.
- Kiunga, Fly River, Papua New Guinea: 1 person.
- Madang, Madang, Papua New Guinea: 1 person.
- Mendi, Southern Highlands, Papua New Guinea: 1 person.
18 Aftershocks detected
After this earthquake struck, 18 smaller aftershocks occurred. Just 7 hrs after this main shock, an earthquake measuring MAG-5.2 was detected 9 km (5 mi) north-northwest of this earthquake.
Overview of foreshocks and aftershocks
Classification | Magnitude | When | Where |
---|---|---|---|
Main Shock This Earthquake |
M 6.9 |
Mar 24, 2024 06:22 (Port Moresby Time) | - |
Aftershock | M 5.1 |
10 mins later Mar 24, 2024 06:32 (Port Moresby Time) | 22 km (14 mi) NNE from Main Shock. |
Aftershock | M 4.8 |
11 mins later Mar 24, 2024 06:33 (Port Moresby Time) | 4 km (2.3 mi) NE from Main Shock. |
Aftershock | M 5.0 |
18 mins later Mar 24, 2024 06:40 (Port Moresby Time) | 21 km (13 mi) E from Main Shock. |
Aftershock | M 4.4 |
29 mins later Mar 24, 2024 06:51 (Port Moresby Time) | 12 km (7 mi) WSW from Main Shock. |
Aftershock | M 4.3 |
34 mins later Mar 24, 2024 06:56 (Port Moresby Time) | 21 km (13 mi) N from Main Shock. |
Aftershock | M 4.2 |
55 mins later Mar 24, 2024 07:16 (Port Moresby Time) | 21 km (13 mi) WNW from Main Shock. |
Aftershock | M 4.1 |
1 hr later Mar 24, 2024 07:46 (Port Moresby Time) | 10 km (6 mi) SSW from Main Shock. |
Aftershock | M 4.2 |
2 hrs later Mar 24, 2024 07:52 (Port Moresby Time) | 21 km (13 mi) NW from Main Shock. |
Aftershock | M 4.2 |
2 hrs later Mar 24, 2024 08:27 (Port Moresby Time) | 2.4 km (1.5 mi) ENE from Main Shock. |
Aftershock | M 4.2 |
2 hrs later Mar 24, 2024 08:31 (Port Moresby Time) | 7 km (4 mi) WSW from Main Shock. |
Aftershock | M 5.2 |
2 hrs later Mar 24, 2024 08:49 (Port Moresby Time) | 7 km (4 mi) NW from Main Shock. |
Aftershock | M 5.2 |
2 hrs later Mar 24, 2024 08:50 (Port Moresby Time) | 12 km (8 mi) WSW from Main Shock. |
Aftershock | M 4.6 |
4 hrs later Mar 24, 2024 10:17 (Port Moresby Time) | 33 km (20 mi) NW from Main Shock. |
Aftershock | M 5.2 |
7 hrs later Mar 24, 2024 13:26 (Port Moresby Time) | 9 km (5 mi) NNW from Main Shock. |
Aftershock | M 4.3 |
11 hrs later Mar 24, 2024 17:28 (Port Moresby Time) | 8 km (5 mi) N from Main Shock. |
Aftershock | M 4.1 |
1 day later Mar 25, 2024 08:16 (Port Moresby Time) | 6 km (4 mi) SE from Main Shock. |
Aftershock | M 4.4 |
2 days later Mar 26, 2024 16:35 (Port Moresby Time) | 28 km (17 mi) NW from Main Shock. |
Aftershock | M 4.5 |
3 days later Mar 26, 2024 20:15 (Port Moresby Time) | 26 km (16 mi) WSW 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).This is an unusually powerful earthquake
Earthquakes of this strength are not so common in the region, but it's not the first time. This is the strongest earthquake to hit since April 2nd, 2023, when a 7 magnitude earthquake hit 23 km (14 mi) further south. An even stronger magnitude 7.5 earthquake struck on February 25th, 2018.
In total, 2 earthquakes with a magnitude of 6.9 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 5 years.
Sources
Last updated 29/04/24 05:58 (). 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.