Strong mag. 5.5 earthquake - 52 km southeast of Neijiang, Sichuan, China, on Thursday, Sep 16, 2021 4:33 am (GMT +8) -

Strong mag. 5.5 earthquake - 52 km southeast of Neijiang, Sichuan, China, on Thursday, Sep 16, 2021 4:33 am (GMT +8)

Strong magnitude 5.5 earthquake at 10 km depth

15 Sep 20:41 UTC: First to report: GFZ after 8 minutes.
15 Sep 20:42: Magnitude recalculated from 5.6 to 5.5. Epicenter location corrected by 3 km (1.8 mi) towards SE.
... [show all] ...
16 Sep 19:02: Hypocenter depth recalculated from 9.0 to 10.0 km (from 5.6 to 6.2 mi). Epicenter location corrected by 1.5 km (0.9 mi) towards NE.
Update Sat, 18 Sep 2021, 15:24
Quake kills at least 2, injures more than 60 and destroys or damages thousands of buildings
Unfortunately, it turned out that damage from this quake was rather large: according to media, 2 people lost their lives, at least 60 were injured and 737 buildings collapsed and more than 7000 damaged.
The magnitude 5.4 quake occurred at a depth of 10 km only 30 km from the city of Luzhou where the greatest damage occurred. Electric power went down and public life came to a standstill.
Update Wed, 15 Sep 2021, 20:45
Significant earthquake of magnitude 5.5 just reported 49 km southeast of Neijiang, China
5.5 quake 16 Sep 4:33 am (GMT +8)
5.5 quake 16 Sep 4:33 am (GMT +8)
A magnitude 5.5 earthquake near Neijiang, Neijiang Shi, Sichuan, China, was reported only 12 minutes ago by the German Research Centre for Geosciences (GFZ), considered one of the key international agencies that monitor seismic activity worldwide. The earthquake occurred at a shallow depth of 10 km beneath the epicenter early morning on Thursday, September 16th, 2021, at 4:33 am local time. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from France's Réseau National de Surveillance Sismique (RéNaSS) which listed the quake at magnitude 5.7. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same quake at magnitude 5.7.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In Neijiang (pop. 546,900) located 49 km from the epicenter, Yongchuan (pop. 94,500) 53 km away, and Zigong (pop. 690,000) 59 km away, the quake should have been felt as light shaking.
Weak shaking might have been felt in Chonglong (pop. 58,400) located 79 km from the epicenter, Jijiang (pop. 61,200) 86 km away, Yibin (pop. 242,100) 88 km away, Xunchang (pop. 64,600) 107 km away, Chongqing (pop. 7,457,600) 121 km away, and Yanjiang (pop. 87,400) 121 km away.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Earthquake data

Date & time: Sep 15, 2021 20:33:31 UTC -
Local time at epicenter: Thursday, Sep 16, 2021 4:33 am (GMT +8)
Magnitude: 5.5
Depth: 10.0 km
Epicenter latitude / longitude: 29.19°N / 105.36°E (Sichuan, China)
Antipode: 29.19°S / 74.64°W
Nearby towns and cities:
52 km (33 mi) SE of Neijiang (pop: 546,900) --> See nearby quakes!
55 km (34 mi) WSW of Yongchuan (Chongqing) (pop: 94,500) --> See nearby quakes!
59 km (37 mi) ESE of Zigong (pop: 690,000) --> See nearby quakes!
82 km (51 mi) SE of Chonglong (pop: 58,400) --> See nearby quakes!
85 km (53 mi) NE of Yibin (pop: 242,100) --> See nearby quakes!
87 km (54 mi) W of Jijiang (Chongqing) (pop: 61,200) --> See nearby quakes!
103 km (64 mi) NE of Xunchang (pop: 64,600) --> See nearby quakes!
123 km (77 mi) WSW of Chongqing (pop: 7,457,600) --> See nearby quakes!
124 km (77 mi) SE of Yanjiang (pop: 87,400) --> See nearby quakes!
206 km (128 mi) SE of Chengdu (pop: 7,415,600) --> See nearby quakes!
Weather at epicenter at time of quake:
Moderate Rain 22.8°C (73 F), humidity: 97%, wind: 2 m/s (4 kts) from WNW
Primary data source: GFZ (German Research Centre for Geosciences)
Estimated released energy: 1.1 x 1013 joules (3.12 gigawatt hours, equivalent to 2682 tons of TNT or 0.2 atomic bombs!) | about seismic energy
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag.DepthLocationSource
5.510 kmSichuan, ChinaGFZ
5.420 kmSICHUAN-CHONGQING BDR REG, CHINAEMSC
5.710 kmChina: Near NanchongRENASS
5.553 kmSichuan, ChinaBMKG
5.410 km52 Km WSW of Yongchuan, ChinaUSGS
5.510 kmSichuan, ChinaGeoAu

User reports for this quake (28)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Luzhou / not felt : It was extreme, everything fell and buildings were damaged, we found 11 bodies from the rubble soon after | 10 users found this interesting.  
Chongqing / Light shaking (MMI IV) / rattling, vibrating / 20-30 s : My bed stars moving. I’m living in 14th floor from a hotel so I just take my clothes and running out. It was my first earthquake experience. | 9 users found this interesting.  
Chongqing (116.8 km ENE of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging : Woke me up, felt shaking in my building from side to side. | 8 users found this interesting.  
Chengdu (205.6 km NW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : This was my first time experiencing an earthquake. I live on the top floor of my apartment building, and when I woke up I felt like I was in the top of a tree swaying in the wind. Then I realized it was an earthquake. I heard the house creaking, and when | 5 users found this interesting.  
Chengdu / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s : I live in the 20th floor and I felt clearly the building was swinging. | 6 users found this interesting. (reported through our app)  
Chengdu (193.7 km NW of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s : I woke up because the bed swung horizontally back and forth. It was a very weak shaking but i think i felt it. | 5 users found this interesting.  
重庆南岸区 Chongqing NanAn / Light shaking (MMI IV) / vertical swinging (up and down) / 10-15 s : It woke me up, so I don't know if it lasted longer than I felt. Sensation of rising and falling, which quickened to 2hz | 3 users found this interesting.  
  • Sounds like a very accurate description!
leshan Sichuan / Strong shaking (MMI VI) / horizontal (sideways) swinging / 30-60 s : The, earthquake woke me up from my sleep , the bed and the house was shaking violently | 3 users found this interesting.  
Neijiang, Longchang, Huangjia (32 km NW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : I felt my wardrobe was shaking, It wasn't violent, it was slight and gentle, I felt it maybe dangerous, my ceiling would fall down. I was calm and peaceful. My neighbor opened their window and their child waked up. | 2 users found this interesting.  
Chengdu (193.7 km NW of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s : I woke up because the bed swung horizontally back and forth. It was a very weak shaking but i think i felt it. | 2 users found this interesting.  
Chongqing (126.3 km ENE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 30-60 s : Slight tremors. Building shaking | One user found this interesting.  
Chengdu / Light shaking (MMI IV) / rattling, vibrating / 1-2 minutes : Little nervous | One user found this interesting.  
Chengdu / Weak shaking (MMI III) / horizontal (sideways) swinging / 15-20 s : Wohne in Chengdu im 20. Stockwerk und konnte deutlich das Schwingen des Gebäudes spüren. | One user found this interesting.  
  • Bin in der Nähe von Chongqing. Das Bett hat anständig geschüttet !
Chengdu (195.9 km NW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 10-15 s : Woke me up, bef swinging side to side  
Yibin, Sichuan (77.5 km SW of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / very short
Chengdu / Light shaking (MMI IV) / rattling, vibrating / 1-2 minutes : Little nervous  
Chengdu / Weak shaking (MMI III) / horizontal (sideways) swinging / 20-30 s
Chengdu / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : The bed on the 7th floor moved back and forth like being on a ship and I was told that even in Chengdu, almost everyone woke up because of it.  
Neijiang / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s
ya'an / Weak shaking (MMI III) / vibration and rolling / 1-2 s
Chengdu / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s (reported through our app)
Chengdu / Weak shaking (MMI III) / horizontal (sideways) swinging / 20-30 s
Chengdu / Light shaking (MMI IV) / horizontal (sideways) swinging / 30-60 s
Xi'an (657.5 km NNE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 30-60 s
santa rosa / Very weak shaking (MMI II)
Chongqing, China (159.1 km E of epicenter) [Map] / Light shaking (MMI IV) / single vertical bump
Chengdu / Light shaking (MMI IV) / horizontal (sideways) swinging / 30-60 s
Chengdu (195.4 km NW of epicenter) [Map] / Very weak shaking (MMI II) / very short
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Aftershocks

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Recorded aftershocks, latest first (1 quake)

Date and timeMag
Depth
LocationDetails
Sep 15, 2021 20:55
18 weeks ago
2.8

15 km
54 km SE of Neijiang, Sichuan, ChinaMore

Earlier earthquakes in the same area

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