Information on the earthquake: moderate mag. Earthquake 4.4 – 45 km northeast of Tainan city, Taiwan, on Sunday, August 22, 2021 at 7:52 p.m. (GMT +8)


Updated: Aug 22, 2021 13:29 GMT – Refresh

Moderate magnitude earthquake 4.4 to 15 km deep

22 Aug 12:00 UTC: First to report: EMSC after 8 minutes.
22 Aug 12:11: Magnitude recalculated from 4.7 to 4.4. Depth of hypocenter recalculated from 14.0 to 10.0 km (8.7 to 6.2 mi). Epicenter location corrected 3.8 km (2.4 mi) to the NE.
22 Aug 12:49: Depth of the hypocenter recalculated from 10.0 to 15.0 km (6.2 to 9.3 mi). Epicenter location corrected 2.2 km (1.4 mi) towards S.

Updated Sun Aug 22, 2021, 12:06 PM

Magnitude 4.7 earthquake strikes near Tainan city, Tainan, Taiwan

4.7 earthquake 22 August 19:52 (GMT +8)

4.7 earthquake 22 August 19:52 (GMT +8)

A low-magnitude 4.7 earthquake was reported in the early evening near Tainan City, Tainan, Taiwan.
According to the Euro-Mediterranean Seismological Center (EMSC), the earthquake struck on Sunday August 22, 2021 at 7:52 p.m. local time at a shallow depth of 14 km. Shallow earthquakes are felt more strongly than deep ones because they are closer to the surface. The exact magnitude, epicenter and depth of the quake could be revised in the coming hours or minutes, as seismologists review the data and refine their calculations, or when other agencies release their report.
Based on preliminary seismic data, the quake was likely felt by many people in the epicenter area. It should not have caused any significant damage, other than objects falling from shelves, broken glass, etc.
In Yujing (16,600 inhabitants) located 13 km from the epicenter, the earthquake should have been felt as a slight tremor.
Weak tremors could be felt in the city of Tainan (771,200 inhabitants) located 42 km from the epicenter, Douliu (104,700 inhabitants) at 60 km, the town of Kaohsiung (1,519,700 inhabitants) at 67 km and the town of Taitung (109,600 inhabitants) 74 km.
Other cities close to the epicenter where the earthquake could have been felt as very weak tremors include the city of Nantou (population 105,700) located 83 km from the epicenter, Yuanlin (population 124,700) at 88 km, the new village of Zhongxing (25,500 inhabitants). ) 88 km and Puli (86,400 inhabitants) 97 km.
VolcanoDiscovery will automatically update the magnitude and depth if these change and follow up if other significant earthquake news becomes available. If you are in the region, please share your experience with us through our reporting mechanism, online or through our mobile app. This will help us provide more first-hand updates to anyone in the world who is interested in learning more about this earthquake.

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Earthquake data:

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Date and Time: Aug 22, 2021 11:52:02 UTC –
Local time at epicenter: Sunday 22 August 2021 19:52 (GMT +8)
Size: 4.4

Depth: 15.0 km
Latitude / longitude of epicenter: 23.17 ° N / 120.61 ° E↗ (Tainan, Taiwan, Taiwan)
Antipode: 23.17 ° S / 59.39 ° W↗
Nearest volcano: Unnamed 24.00 ° N / 121.83 ° E (157 km / 98 mi)

Nearby towns and villages:
16 km (10 mi) ENE of Yujing (pop: 16,600) -> See nearby earthquakes!
45 km (28 mi) ENE of City of Tainan (pop: 771,200) -> Observe the earthquakes nearby!
60 km (38 mi) south of Douliu (pop: 104,700) -> Observe the earthquakes nearby!
66 km (41 mi) SSO of Lugu (pop: 19,600) -> Observe the earthquakes nearby!
69 km (43 mi) NNE of Kaohsiung City (pop: 1,519,700) -> See nearby earthquakes!
71 km (44 mi) northwest of City of Taitung (pop: 109,600) -> See nearby earthquakes!
83 km (52 ​​mi) south of City of Nantou (pop: 105,700) -> See earthquakes nearby!
88 km (54 mi) south of Yuanlin (pop: 124,700) -> See nearby earthquakes!
88 km (55 mi) south of Zhongxing New Village (Nantou City) (pop: 25,500) -> Observe the earthquakes nearby!
229 km (142 mi) SSO of Taipei (pop: 7 871 900) -> Watch the earthquakes nearby!

Weather at the epicenter at the time of the earthquake:
Clouds covered 22.9 ° C (73 F), humidity: 82%, wind: 1 m / s (2 kts) from ESS

Main data source: EMSC (European-Mediterranean Seismological Center)

Estimated energy released: 2.5 x 1011 joules (69.8 megawatt hours, equivalent to 60 tonnes of TNT) Find out more

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Data for the same earthquake reported by different agencies

Info: The more agencies report the same earthquake and publish similar data, the more confidence you can have in the data. It normally takes up to a few hours for the seismic parameters to be calculated with near optimum accuracy.

Mag. Depth Site Source
4.4 15 km TAIWAN EMSC
unknown n / A Near Douliu, Taiwan, Taiwan VolcanoDiscovery
4.4 14 km 14 Km ENE from Yujing, Taiwan USGS

User reports for this earthquake (3)

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DALIN CHIAYI COUNTY (49.4 km NNW of epicenter) [Map] / very weak shaking (MMI II) / single side shaking / 2-5 s : 2nd floor perterbations | One user found this interesting.

Kaohsiung / Very weak shaking (MMI II) / vertical sway (up and down) / 2-5 s

?? / Weak shaking (MMI III) / rattling, vibrations / 1-2 s

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