On Monday Afternoon a Shallow M5.7 Earthquake struck in the Maluku Sea 210km from Ternate (Indonesia).

Written by Earthquakelist.org on October 21st, 2024. Last updated October 22nd, 2024.

In the Maluku Sea 210 kilometer from Ternate, Indonesia, a shallow and significant MAG-5.7 earthquake occurred in the afternoon of Monday October 21st, 2024. Shaking may have been felt by a total of 240 thousand people.

Earthquake Summary

This earthquake hit under water in the Maluku Sea, right off the coast of Indonesia (9 mi offshore), 210 kilometer south of Ternate in North Maluku. 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:	Oct 21, 2024 15:32 (Jayapura Time) - Oct 21, 2024 06:32 Universal Time.
Location:	210 km south of Ternate, North Maluku, Indonesia. Coordinates 1°5'57"S 127°25'5"E.
Map:	Map of area around epicenter. Click to open in Google Maps.
Magnitude:	MAG 5.7 Detected by 150 stations. Maximum Error Range ±0.049 .
Depth:	10 km (6 mi) A very shallow depth.
Max. Intensity:	VII Very Strong On the Modified Mercalli Scale.
Tsunami Risk:	Low tsunami risk Earthquakes under MAG-6.5 do not usually cause tsunami's. 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 65% likelyhood of between 0 and 1 fatalities, and a 96% chance that the number of fatalities falls no higher than 10.

The USGS classifies the economic impact of this earthquake at level GREEN (low). They expect an 65% likelyhood of between 0 and 1 million US Dollars in economic damage and impact, and a 96% chance that the economic impact of this earthquake falls no higher than 10 million USD.

Roughly 240 thousand people exposed to shaking

The USGS has published a report estimating the number of people exposed to this earthquake. Acoording to their analysis, roughly 240 thousand have been exposed to shaking at an MMI level of II or higher.

Strong shaking and probably light damage may have been experienced by an estimated 730 people. At VI, it is the highest MMI level this earthquake has caused. The majority of people (roughly 150 thousand) live in an area exposed to level III, where weak shaking and probably no damage is expected. All exposure to shaking was within the borders of Indonesia .

People	MMI Level	Shaking	Damage
0	I	Not noticable	None
0	II	Very weak	None
148,700	III	Weak	Probably none
84,020	IV	Light	Likely none
10,990	V	Moderate	Very light
730	VI	Strong	Light
0	VII	Very Strong	Moderate
0	VIII	Severe	Moderate to heavy
0	IX	Violent	Heavy
0	X	Extreme	Very heavy

Nearby towns and cities

This earthquake may have been felt in Indonesia . Located 205 kilometer (127 mi) south of the epicenter of this earthquake, Sofifi (North Maluku, Indonesia) is the nearest significant population center.

Overview of nearby places

Cities and Towns around the epicenter of this earthquake.
Distance	Place
205 km (127 mi) N from epicenter	Sofifi North Maluku, Indonesia.
210 km (130 mi) N from epicenter	Ternate North Maluku, Indonesia.
300 km (186 mi) SE from epicenter	Amahai Maluku, Indonesia.

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 VI.

I Not felt

II Weak

III Weak

IV Light

V Moderate

VI Strong

VII Very Strong

VIII Severe

IX Violent

X Extreme

Earthquake Intensity Map based on Shakemap Data provided by USGS.

26 Aftershocks detected

Since this main shock, 26 smaller aftershocks were detected. At a distance of 2.9 km (1.8 mi) west-northwest of this earthquake, an aftershock struck 5 hrs later. It measured a magnitude of 5.2

Overview of foreshocks and aftershocks

Detected MAG2.5+ earthquakes within within 100km (62 mi), that occurred in the three days before and after the main shock.
Classification	Magnitude	When	Where
Main Shock	M 5.8	Oct 21, 2024 12:24 (Jayapura Time)	-
Aftershock	M 3.9	13 mins later Oct 21, 2024 12:37 (Jayapura Time)	5 km (3 mi) NNW from Main Shock.
Aftershock	M 3.6	19 mins later Oct 21, 2024 12:42 (Jayapura Time)	75 km (46 mi) NNE from Main Shock.
Aftershock	M 4.9	29 mins later Oct 21, 2024 12:53 (Jayapura Time)	32 km (20 mi) W from Main Shock.
Aftershock	M 4.8	46 mins later Oct 21, 2024 13:10 (Jayapura Time)	11 km (7 mi) NE from Main Shock.
Aftershock	M 5.2	48 mins later Oct 21, 2024 13:12 (Jayapura Time)	8 km (5 mi) NNE from Main Shock.
Aftershock	M 3.7	1 hr later Oct 21, 2024 13:42 (Jayapura Time)	16 km (10 mi) NNW from Main Shock.
Aftershock	M 4.2	4 hrs later Oct 21, 2024 16:06 (Jayapura Time)	4 km (2.4 mi) E from Main Shock.
Aftershock	M 3.4	4 hrs later Oct 21, 2024 16:19 (Jayapura Time)	76 km (47 mi) N from Main Shock.
Aftershock	M 3.7	4 hrs later Oct 21, 2024 16:30 (Jayapura Time)	8 km (5 mi) E from Main Shock.
Aftershock	M 3.7	4 hrs later Oct 21, 2024 16:48 (Jayapura Time)	19 km (12 mi) WNW from Main Shock.
Aftershock	M 3.2	5 hrs later Oct 21, 2024 17:02 (Jayapura Time)	42 km (26 mi) NE from Main Shock.
Aftershock	M 4.9	5 hrs later Oct 21, 2024 17:08 (Jayapura Time)	14 km (9 mi) W from Main Shock.
Aftershock	M 4.0	5 hrs later Oct 21, 2024 17:15 (Jayapura Time)	12 km (7 mi) WNW from Main Shock.
Aftershock	M 5.2	5 hrs later Oct 21, 2024 17:24 (Jayapura Time)	2.9 km (1.8 mi) WNW from Main Shock.
Aftershock	M 5.0	5 hrs later Oct 21, 2024 17:35 (Jayapura Time)	11 km (7 mi) NE from Main Shock.
Aftershock	M 4.0	5 hrs later Oct 21, 2024 17:46 (Jayapura Time)	19 km (11 mi) WNW from Main Shock.
Aftershock	M 3.5	7 hrs later Oct 21, 2024 19:41 (Jayapura Time)	19 km (12 mi) WNW from Main Shock.
Aftershock	M 4.0	8 hrs later Oct 21, 2024 20:18 (Jayapura Time)	13 km (8 mi) NNW from Main Shock.
Aftershock	M 4.6	12 hrs later Oct 22, 2024 00:15 (Jayapura Time)	3 km (1.9 mi) S from Main Shock.
Aftershock	M 3.0	13 hrs later Oct 22, 2024 01:47 (Jayapura Time)	47 km (29 mi) NE from Main Shock.
Aftershock	M 4.5	16 hrs later Oct 22, 2024 04:22 (Jayapura Time)	3 km (2.1 mi) SSE from Main Shock.
Aftershock	M 3.5	19 hrs later Oct 22, 2024 07:33 (Jayapura Time)	17 km (10 mi) N from Main Shock.
Aftershock	M 3.8	1 day later Oct 22, 2024 14:12 (Jayapura Time)	19 km (12 mi) WNW from Main Shock.
Aftershock	M 4.3	1 day later Oct 22, 2024 18:30 (Jayapura Time)	33 km (20 mi) N from Main Shock.
Aftershock	M 3.6	1 day later Oct 22, 2024 18:44 (Jayapura Time)	19 km (12 mi) N from Main Shock.
Aftershock	M 4.9	1 day later Oct 22, 2024 21:48 (Jayapura Time)	13 km (8 mi) NNW 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. This is the strongest earthquake to hit since October 21st, 2024, when a 5.8 magnitude earthquake hit 8 km (5 mi) further south. An even stronger magnitude 7.2 earthquake struck on July 14th, 2019.

In total, 18 earthquakes with a magnitude of 5.7 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 7 months.

Low tsunami risk

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.

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 5.7. 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 22/10/24 18:18 (). 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.