Written by on . Last updated June 25th, 2024.

In the night of Saturday April 27th, 2024, a significant Magnitude 5.7 earthquake hit in the Philippine Sea 21 kilometer from Hualien City, Taiwan. The earthquake struck near a very densely populated region. Roughly 24 million people may have felt this earthquake. Other nearby countries are Japan and China.

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Earthquake Summary

This earthquake hit under water in the Philippine Sea, right off the coast of Taiwan (2 mi offshore), 21 kilometer north-northeast of Hualien City in Hualien County. The center of this earthquake had a quite shallow depth of 38 km. Shallow earthquakes usually have a larger impact than earthquakes deep in the earth.

Date and Time: Apr 27, 2024 02:21 (Taipei Time)
- Apr 26, 2024 18:21 Universal Time.
Location: 21 km NNE of Hualien City, Hualien County, Taiwan.
Coordinates 24°9'11"N 121°40'21"E.
Map: Map of area around epicenter.
Map of area around epicenter. Click to open in Google Maps.
Magnitude: MAG 5.7
Detected by 38 stations. Maximum Error Range ±0.05 .
Depth: 38 km (23 mi)
A quite shallow depth.
Max. Intensity:
VI
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 24 million people exposed to shaking

The USGS has published a report estimating the number of people exposed to this earthquake. Acoording to their analysis, roughly 24 million have been exposed to shaking at an MMI level of II or higher.

Moderate shaking and very light damage may have been experienced by an estimated 481,700 people. At V, it is the highest MMI level this earthquake has caused. Intensity level IV was experienced by the majority of people (around 22 million). In their region, light shaking and likely no damage can be expected.

People in 3 countries have been exposed to shaking. In Taiwan , around 23 million people, with impact levels up to V (moderate shaking, very light damage). A smaller number of people were exposed in the following countries: China and Japan.

People MMI Level Shaking Damage
0
I
Not noticable None
0
II
Very weak None
1,012,000
III
Weak Probably none
22,280,000
IV
Light Likely none
481,700
V
Moderate Very light
0
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 struck within proximity of multiple countries. Taiwan , Japan and China are all within 300km distance of its epicenter.

The closest significant population center near the earthquake is Hualien City in Hualien County, Taiwan. Hualien City is located 21 kilometer (13 mi) north-northeast of the epicenter. The intensity of shaking and damage in Hualien City is estimated to be around level V on the Modified Mercalli Intensity scale (moderate shaking, very light damage).

Multiple large cities are in proximity of today's earthquake. Taipei is located 100 km to the north and experienced an intensity of V (moderate shaking, very light damage). Hualien City is located 21 km to the south-southwest and experienced an intensity of V (moderate shaking, very light damage). Taichung is located 100 km to the west and experienced an intensity of IV (light shaking, likely no 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)
21 km (13 mi)
SSW from epicenter
Hualien City

Hualien County, Taiwan.
V
Moderate
68 km (42 mi)
N from epicenter
Yilan

Yilan County, Taiwan.
V
Moderate
74 km (46 mi)
WSW from epicenter
Puli

Nantou County, Taiwan.
IV
Light
90 km (56 mi)
NNW from epicenter
Daxi

Taoyuan City , Taiwan.
IV
Light
98 km (61 mi)
NNW from epicenter
Banqiao

New Taipei City, Taiwan.
IV
Light
100 km (62 mi)
W from epicenter
Taichung

Taichung City, Taiwan.
IV
Light
100 km (62 mi)
N from epicenter
Taipei

Taipei City, Taiwan.
V
Moderate
101 km (63 mi)
NNW from epicenter
Taoyuan City

Taoyuan City , Taiwan.
IV
Light
102 km (63 mi)
NW from epicenter
Hsinchu

Hsinchu County, Taiwan.
IV
Light
103 km (64 mi)
WSW from epicenter
Zhongxing New Village

Nantou County, Taiwan.
IV
Light
104 km (65 mi)
WSW from epicenter
Lugu

Nantou County, Taiwan.
IV
Light
106 km (66 mi)
WSW from epicenter
Nantou

Nantou County, Taiwan.
IV
Light
109 km (68 mi)
N from epicenter
Keelung

Keelung, Taiwan.
IV
Light
113 km (70 mi)
WSW from epicenter
Yuanlin

Changhua County, Taiwan.
IV
Light
125 km (78 mi)
WSW from epicenter
Douliu

Yunlin County, Taiwan.
IV
Light
168 km (104 mi)
SW from epicenter
Yujing

Tainan City, Taiwan.
IV
Light
197 km (122 mi)
SW from epicenter
Tainan

Tainan City, Taiwan.
IV
Light
220 km (137 mi)
SW from epicenter
Kaohsiung

Kaohsiung, Taiwan.
IV
Light
222 km (138 mi)
WSW from epicenter
Magong

Penghu County , Taiwan.
225 km (140 mi)
SSW from epicenter
Donggang

Pingtung County, Taiwan.
IV
Light
253 km (157 mi)
E from epicenter
Ishigaki

Okinawa, Japan.
257 km (160 mi)
SSW from epicenter
Hengchun

Pingtung County, Taiwan.
290 km (180 mi)
NW from epicenter
Fuqing

Fujian, China.
290 km (180 mi)
WNW from epicenter
Jiangkou

Fujian, China.
295 km (183 mi)
NW from epicenter
Tantou

Fujian, China.
Cities and Towns around the epicenter of this earthquake.

Earthquake Intensity Map

The maximum intensity (MMI Scale) caused by this earthquake is V. The map below shows in which areas this earthquake was the most and least impactful. It is based on data from the US Geographic Survey.

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.

Shaking reported by 149 people in 3 countries

People that feel an earthquake may report their experience to the US Geographic Survey. Currently, 149 people have reported shaking in 44 places in 3 countries (Taiwan, China, Japan).We keep updating this article as more ground reports become available. You may report that you felt this earthquake here.

Places with most reports:

  • Yungho, Taipei Hsien, Taiwan: 37 people.
  • Taichung, Taichung Shih, Taiwan: 15 people.
  • Hsichih, Taipei Hsien, Taiwan: 10 people.
  • Taoyuan, Taoyuan, Taiwan: 8 people.
  • Chungho, Taipei Hsien, Taiwan: 8 people.
  • Sanchung, Taipei Hsien, Taiwan: 7 people.
  • Shulin, Taipei Hsien, Taiwan: 5 people.
  • Tucheng, Taipei Hsien, Taiwan: 4 people.
  • Tanshui, Taipei Hsien, Taiwan: 4 people.
  • Taipei, Taipei Hsien, Taiwan: 4 people.

11 Aftershocks detected

After this earthquake struck, 11 smaller aftershocks occurred. A 5.2 magnitude earthquake hit 28 mins later 10 km (6 mi) north of this earthquake.

This main shock was prefaced by 25 smaller foreshocks. Roughly 2 days before this earthquake, a foreshock measuring MAG-5.1 was detected nearby this earthquake.

Overview of foreshocks and aftershocks

Classification Magnitude When Where
Foreshock M 4.1 3 days earlier
Apr 24, 2024 09:46 (Taipei Time)
26 km (16 mi)
SSE from Main Shock.
Foreshock M 4.3 3 days earlier
Apr 24, 2024 09:53 (Taipei Time)
23 km (14 mi)
S from Main Shock.
Foreshock M 4.3 3 days earlier
Apr 24, 2024 11:28 (Taipei Time)
51 km (32 mi)
S from Main Shock.
Foreshock M 4.6 3 days earlier
Apr 24, 2024 13:01 (Taipei Time)
28 km (17 mi)
ENE from Main Shock.
Foreshock M 4.9 2 days earlier
Apr 24, 2024 15:30 (Taipei Time)
46 km (28 mi)
S from Main Shock.
Foreshock M 4.3 2 days earlier
Apr 24, 2024 15:51 (Taipei Time)
39 km (24 mi)
SSW from Main Shock.
Foreshock M 4.0 2 days earlier
Apr 24, 2024 16:31 (Taipei Time)
22 km (14 mi)
ENE from Main Shock.
Foreshock M 4.3 2 days earlier
Apr 24, 2024 17:23 (Taipei Time)
27 km (17 mi)
SSW from Main Shock.
Foreshock M 4.0 2 days earlier
Apr 24, 2024 21:37 (Taipei Time)
42 km (26 mi)
SSW from Main Shock.
Foreshock M 4.6 2 days earlier
Apr 25, 2024 00:59 (Taipei Time)
74 km (46 mi)
ESE from Main Shock.
Foreshock M 4.3 2 days earlier
Apr 25, 2024 01:06 (Taipei Time)
71 km (44 mi)
ESE from Main Shock.
Foreshock M 5.1 2 days earlier
Apr 25, 2024 02:11 (Taipei Time)
66 km (41 mi)
ESE from Main Shock.
Foreshock M 5.1 2 days earlier
Apr 25, 2024 02:12 (Taipei Time)
63 km (39 mi)
ESE from Main Shock.
Foreshock M 4.2 2 days earlier
Apr 25, 2024 03:19 (Taipei Time)
67 km (42 mi)
ESE from Main Shock.
Foreshock M 4.0 2 days earlier
Apr 25, 2024 07:53 (Taipei Time)
29 km (18 mi)
S from Main Shock.
Foreshock M 4.0 2 days earlier
Apr 25, 2024 08:11 (Taipei Time)
51 km (32 mi)
S from Main Shock.
Foreshock M 4.6 2 days earlier
Apr 25, 2024 08:19 (Taipei Time)
56 km (35 mi)
S from Main Shock.
Foreshock M 4.2 2 days earlier
Apr 25, 2024 08:48 (Taipei Time)
56 km (35 mi)
S from Main Shock.
Foreshock M 4.2 2 days earlier
Apr 25, 2024 09:23 (Taipei Time)
38 km (24 mi)
S from Main Shock.
Foreshock M 4.0 2 days earlier
Apr 25, 2024 09:43 (Taipei Time)
52 km (32 mi)
S from Main Shock.
Foreshock M 4.3 1 day earlier
Apr 25, 2024 17:03 (Taipei Time)
31 km (19 mi)
SSE from Main Shock.
Foreshock M 4.2 1 day earlier
Apr 25, 2024 22:17 (Taipei Time)
7 km (5 mi)
NNE from Main Shock.
Foreshock M 4.2 1 day earlier
Apr 26, 2024 00:20 (Taipei Time)
5 km (3 mi)
NW from Main Shock.
Foreshock M 4.0 14 hrs earlier
Apr 26, 2024 12:43 (Taipei Time)
28 km (17 mi)
S from Main Shock.
Foreshock M 4.6 6 hrs earlier
Apr 26, 2024 20:28 (Taipei Time)
43 km (27 mi)
SSW from Main Shock.
Main Shock
This Earthquake
M 5.7 Apr 27, 2024 02:21
(Taipei Time)
-
Aftershock M 4.3 24 mins later
Apr 27, 2024 02:45 (Taipei Time)
4 km (2.2 mi)
WNW from Main Shock.
Aftershock M 5.2 28 mins later
Apr 27, 2024 02:49 (Taipei Time)
10 km (6 mi)
N from Main Shock.
Aftershock M 4.4 52 mins later
Apr 27, 2024 03:13 (Taipei Time)
1.6 km (1 mi)
WNW from Main Shock.
Aftershock M 4.5 2 hrs later
Apr 27, 2024 04:08 (Taipei Time)
35 km (22 mi)
ESE from Main Shock.
Aftershock M 4.3 7 hrs later
Apr 27, 2024 09:06 (Taipei Time)
2.1 km (1.3 mi)
NNE from Main Shock.
Aftershock M 4.0 1 day later
Apr 28, 2024 03:24 (Taipei Time)
26 km (16 mi)
SSW from Main Shock.
Aftershock M 3.9 1 day later
Apr 28, 2024 04:30 (Taipei Time)
34 km (21 mi)
SSW from Main Shock.
Aftershock M 4.1 2 days later
Apr 28, 2024 16:13 (Taipei Time)
6 km (4 mi)
N from Main Shock.
Aftershock M 4.2 2 days later
Apr 28, 2024 20:05 (Taipei Time)
38 km (23 mi)
S from Main Shock.
Aftershock M 4.4 2 days later
Apr 29, 2024 01:40 (Taipei Time)
5 km (2.9 mi)
SSE from Main Shock.
Aftershock M 4.2 3 days later
Apr 30, 2024 00:21 (Taipei Time)
10 km (6 mi)
S 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.

In only six percent of cases, significant earthquakes are followed by a larger main shock, making the current earthquake a foreshock. While the chance of this happening is not so large, it is adviced to maintain cautiousness in the hours and days following a major 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 April 23rd, 2024, when a 5.8 magnitude earthquake hit 42 km (26 mi) further south. An even stronger magnitude 7.4 earthquake struck on April 2nd, 2024.

In total, 38 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 3 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 38 km (23 mi). Earthquakes this shallow could trigger a tsunami.

Sources

Last updated 25/06/24 02:38 (). 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.

  1. US Geographic Society (USGS): Earthquake us6000mu3y
  2. European-Mediterranean Seismological Centre (EMSC): Earthquake 20240426_0000222
  3. Geonames.org: World Cities Database
  4. Google Maps: Static API
  5. Earthquakelist.org: Historic Earthquakes Database

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