Sismo leggero mag. 4.7 - 13 km a ovest da Tezpur, Sonitpur, Assam, India, mercoledì, 17 febbraio 2021 -

Sismo leggero mag. 4.7 - 13 km a ovest da Tezpur, Sonitpur, Assam, India, mercoledì, 17 febbraio 2021

Sismo leggero magnitudine 4.7 at 46 km depth

17 Feb 12:36 UTC: Primo a segnalare: EMSC dopo 11 minuti.
17 Feb 12:55: Profondità ricalcolata da 10.0 a 53.0 km (da 6.2 a 33 mi). Posizione dell'epicentro corretta di 10 km (6.2 mi) al WSW.
17 Feb 12:56: Profondità ricalcolata da 53.0 a 40.0 km (da 33 a 25 mi). Posizione dell'epicentro corretta di 15 km (9.3 mi) al E.
17 Feb 17:46: Profondità ricalcolata da 40.0 a 46.0 km (da 25 a 29 mi). Posizione dell'epicentro corretta di 4.5 km (2.8 mi) al SO.
Update Wed, 17 Feb 2021, 14:24
What formed the Himalayas?
Movement of India against the Eurasian Plate (source: USGS)
Movement of India against the Eurasian Plate (source: USGS)
The recent earthquake in Assam, India, was only the latest of uncountable quakes that have been happening in the area since people can remember. The region is tectonically highly active due to the on-going collision between the Indian subcontinent and the Eurasian Plate. This collision actually formed the Himalayan Mountain Ranges millions of years ago.
Update Wed, 17 Feb 2021, 13:53
4.7 quake in Assam, India: People alarmed, but no damage
Intensity map of the quake (source: National Center for Seismology - Government of India)
Intensity map of the quake (source: National Center for Seismology - Government of India)
About an hour ago, India's state of Assam, located in the northeastern part of the country, south of the Himalayas, was hit by a magnitude 4.7 earthquake. The epicenter of the quake, which hit at a depth of 40 km, was located 17 km from the town of Tezpur.
The affected area is densely populated. Within minutes after the quake, we received multiple reports from users within a radius of 200 km from the epicenter who felt the quake as light to strong shaking, depending on their distance from the quake.
According to IndiaToday, there were no immediate reports of casualties, or property damages. However, people reported that electricity and mobile networks were down for a few minutes after the quake but was quickly restored.
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Earthquake data:

Data & ora: 17 Feb 2021 12:24:49 UTC -
Ora locale a epicentro: mercoledì, 17 feb 2021 17:54 (GMT +5:30)
Magnitudine: 4.7
Profondità: 46.0 km
Epicentro latitudine / longitudine: 26.64°N / 92.67°E (Sonitpur, Assam, India)
Nearby towns and cities:
13 km O da Tezpur (pop: 58,900) --> Vedi sismi vicini
20 km ESE da Dhekiajuli (Sonitpur) (pop: 21,300) --> Vedi sismi vicini
22 km S da Rangāpāra (Sonitpur) (pop: 18,700) --> Vedi sismi vicini
27 km NE da Dhing (Nagaon) (pop: 20,800) --> Vedi sismi vicini
54 km ENE da Khārupatia (Darrang) (pop: 18,600) --> Vedi sismi vicini
54 km NE da Morigaon (pop: 20,800) --> Vedi sismi vicini
73 km NNO da Hojāi (Nagaon) (pop: 36,900) --> Vedi sismi vicini
103 km NE da Dispur (pop: 10,800) --> Vedi sismi vicini
105 km ENE da Guwahati (pop: 899,100) --> Vedi sismi vicini
240 km NNO da Imphal (Manipur) (pop: 223,500) --> Vedi sismi vicini
Weather at epicenter at time of quake:
Overcast Clouds 22.5°C (72 F), humidity: 42%, wind: 2 m/s (4 kts) from ENE
Fonte dati primaria: EMSC (European-Mediterranean Seismological Centre)
Stima dell'energia sismica liberata: 7.1 x 1011 joules (197 megawatt hours, equivalent to 169 tons of TNT) More info
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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.
MagnitudineProfonditàUbicazioneFonte
4.746 kmASSAM, INDIAEMSC
4.753 km7 Km ESE of Dhekiajuli, IndiaUSGS
4.510 kmNortheastern IndiaGFZ
4.740 kmNortheastern IndiaBMKG

User reports for this quake (128)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Jagiroad (70.9 km SW of epicenter) [Map] / Moderate shaking (MMI V) / 5-10 s : I live on the 2nd floor in US system. I was on my chair and table with my laptop when I felt a feeble shake, which I ignored as a minor earthquake. The second shake was massive and the greatest and I started to run. When I was in near the door I felt the third shake which was immense. And while descending I felt the third and last shake which was strong but not as strong as the last two, which might be because I was halfway down the stairs. No damage to property in my knowledge. | 2 users found this interesting.  
Tezpur (12.3 km E of epicenter) [Map] / Light shaking (MMI IV) : No damage to property but felt dizzy long after it stopped.Today during dusk for an hour we saw more than 50 crows,cawing and flying with a restlesness in circular motion near a mobile tower here,strange behaviour not normal | 2 users found this interesting.  
8.1 km NNW of epicenter [Map] / Strong shaking (MMI VI) : House was shaking like a train for 3-4 sec | One user found this interesting.  
113.5 km WSW of epicenter [Map] / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s : Felt it quite long. | One user found this interesting.  
Nagaon -782003 / Strong shaking (MMI VI) : A strong shaking but for few seconds only. Electricity disrupted for half an hour. Remembering jolt. Thank God. All are safe.  
Itanagar / Light shaking (MMI IV) : Heard the sound inside the rooms, mirror hanging on the wall was shaking producing noticeable sounds from distance. Alarmed all others nearby.  
Nagaon Assam / Strong shaking (MMI VI) / single vertical bump / 5-10 s : It was horrible I was in our library and suddenly the quake occurred . The noise was like something has fallen off the self. My parrot was terrified after that  
Guwahati, Assam / Very weak shaking (MMI II) / vertical swinging (up and down) / 2-5 s : I was in first floor of my building. Felt very light shaking. | One user found this interesting.  
Tezpur, Assam, India / Strong shaking (MMI VI) : I feel it very strongly . My heartbeat beats faster. | One user found this interesting.  
13.1 km NE of epicenter [Map] / Moderate shaking (MMI V) / rattling, vibrating / 10-15 s
113.5 km WSW of epicenter [Map] / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s : Felt it quite long.  
Mangaldoi (66.5 km WSW of epicenter) [Map] / Moderate shaking (MMI V) / single lateral shake / 2-5 s
42.1 km ENE of epicenter [Map] / Moderate shaking (MMI V) / simple rolling (tilting sideways along one direction) / 5-10 s
Tezpur (11.5 km E of epicenter) [Map] / Strong shaking (MMI VI) / vibration and rolling / 10-15 s
Tura (269.9 km WSW of epicenter) [Map] / Weak shaking (MMI III) / 5-10 s
13 km E of epicenter [Map] / Moderate shaking (MMI V)
missamari (20.5 km NNW of epicenter) [Map] / Strong shaking (MMI VI) / both vertical and horizontal swinging / 5-10 s
66.6 km WSW of epicenter [Map] / Light shaking (MMI IV)
Tezpur (49.8 km S of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s
10.8 km E of epicenter [Map] / Moderate shaking (MMI V) / complex motion difficult to describe
Tezpur Medical College, Tumuki, Tezpur, Sonitpur (4.5 km NNW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s
Goroimari, Tezpur, Assam (13.1 km NE of epicenter) [Map] / Moderate shaking (MMI V)
Mission Chariali. Tezpur, Assam (10.3 km E of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging
212.3 km W of epicenter [Map] / Light shaking (MMI IV)
41.1 km SSW of epicenter [Map] / Light shaking (MMI IV) / single lateral shake / 2-5 s (reported through our app)
10.9 km E of epicenter [Map] / Light shaking (MMI IV)
Mission charali (14.1 km NE of epicenter) [Map] / Very strong shaking (MMI VII)
196 km ENE of epicenter [Map] / Moderate shaking (MMI V) / 1-2 s : Just feel shaking everything around me  
154.2 km E of epicenter [Map] / Light shaking (MMI IV) / 5-10 s
13 km E of epicenter [Map] / Moderate shaking (MMI V)
104.4 km ENE of epicenter [Map] / Very weak shaking (MMI II)
105.1 km SW of epicenter [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / 20-30 s
160.1 km WSW of epicenter [Map] / Strong shaking (MMI VI) / single vertical bump / 2-5 s
143.6 km SSW of epicenter [Map] / Weak shaking (MMI III)
275.2 km ENE of epicenter [Map] / Weak shaking (MMI III)
Naharlagun, arunachal pradesh, india (114.8 km ENE of epicenter) [Map] / Light shaking (MMI IV) / 5-10 s (reported through our app)
283.9 km ENE of epicenter [Map] / not felt
279.1 km ENE of epicenter [Map] / Light shaking (MMI IV) / rattling, vibrating / 10-15 s
12.9 km E of epicenter [Map] / Very strong shaking (MMI VII)
Guwahati (103.7 km SW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s
Guwahati (107.4 km WSW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 15-20 s
110.6 km WSW of epicenter [Map] / Moderate shaking (MMI V)
Guwahati (101.9 km WSW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 5-10 s
14.4 km NE of epicenter [Map] / Moderate shaking (MMI V) / both vertical and horizontal swinging / 15-20 s
Umiam (132.4 km SW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating (reported through our app)
Tezpur (12.6 km E of epicenter) [Map] / Strong shaking (MMI VI) / horizontal (sideways) swinging / 2-5 s
13.8 km NE of epicenter [Map] / Strong shaking (MMI VI)
117.1 km W of epicenter [Map] / not felt
197.5 km ENE of epicenter [Map] / Light shaking (MMI IV) / 5-10 s
35.1 km S of epicenter [Map] / Moderate shaking (MMI V) / single vertical bump / 2-5 s
Assam, sonitpur (28.3 km NE of epicenter) [Map] / Strong shaking (MMI VI)
TEZPUR (15.6 km NE of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s
11.4 km E of epicenter [Map] / Strong shaking (MMI VI) / rattling, vibrating / 5-10 s
kazhiranga national park / Light shaking (MMI IV)
Hojai / Strong shaking (MMI VI) / rattling, vibrating / 2-5 s : We felt strong shake during this earthquake. We went outside.  
Nagaon, assam / Moderate shaking (MMI V)
Gohpur / Weak shaking (MMI III) / rattling, vibrating / 2-5 s
Guwahati / Moderate shaking (MMI V) / horizontal (sideways) swinging / 10-15 s
Mazbat / Moderate shaking (MMI V)
Dhekiajuli / Strong shaking (MMI VI) / complex motion difficult to describe / 10-15 s
Guwahati / Very weak shaking (MMI II) / single lateral shake / 10-15 s
Tezpur ushanagar / Moderate shaking (MMI V) / rattling, vibrating / 1-2 s
Umiam, Meghalaya / Light shaking (MMI IV)
Guwahati / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s
Guwahati / Very weak shaking (MMI II) / single vertical bump / 1-2 s
Guwahati taj Vivanta / Weak shaking (MMI III) / 5-10 s
Guwahati / Weak shaking (MMI III)
Tezpur / Moderate shaking (MMI V) / simple rolling (tilting sideways along one direction) / 2-5 s
NOIDA / not felt
Tezpur Unibersity / Moderate shaking (MMI V)
Rangapara / Moderate shaking (MMI V) / rattling, vibrating / 10-15 s
Tezpur / Strong shaking (MMI VI)
Assam / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
Pithakhowa / Strong shaking (MMI VI) / single lateral shake / 1-2 s
tezpur / Light shaking (MMI IV)
Tezpur / Light shaking (MMI IV) / 2-5 s
Golaghat / Light shaking (MMI IV)
nagaon / Moderate shaking (MMI V) / horizontal (sideways) swinging
Missamari / Strong shaking (MMI VI) : The quake was horrible all things are shaking very quikly for a while abot 2- 4 second.  
Tezpur University, Tezpur / Light shaking (MMI IV) / 20-30 s
Tezpur University / Moderate shaking (MMI V)
Nagaon / Moderate shaking (MMI V) / 1-2 s
Nagaon city / Strong shaking (MMI VI) / single vertical bump / 5-10 s : I feared. Our pat bird a parrot shocked.  
nagaon / Light shaking (MMI IV)
Guwahati / Strong shaking (MMI VI)
Guwahati / Light shaking (MMI IV) / 2-5 s
Naogaon / Moderate shaking (MMI V)
Rangapara / Strong shaking (MMI VI) / 5-10 s
Muolhoi, Haflong, Dima Hasao / Light shaking (MMI IV) / horizontal (sideways) swinging / 1-2 s : Felt moderate shakes  
Nagaon / Moderate shaking (MMI V) / vertical swinging (up and down) / 20-30 s
Tezpur / Moderate shaking (MMI V)
Missamari / Strong shaking (MMI VI)
Tezpur / Moderate shaking (MMI V) / horizontal (sideways) swinging / 1-2 s
Guwahati / Weak shaking (MMI III) / 10-15 s
Nagaon haibargaon / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
Tezpur / Strong shaking (MMI VI)
Tezpur / Strong shaking (MMI VI) / rattling, vibrating / 2-5 s
guwahati / Moderate shaking (MMI V) / single vertical bump / 2-5 s
Nagaon,Assam / Strong shaking (MMI VI) / 1-2 s
Rangapara / Strong shaking (MMI VI) / complex motion difficult to describe / 10-15 s
Nagaon / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s : Short but strong vibration with moderate shaking....felt by most of us...  
Nagaon Assam / Severe shaking (MMI VIII) / rattling, vibrating / 5-10 s
Rangapara / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s : Quite frightening  
Tezpur / Severe shaking (MMI VIII)
Tezpur / Strong shaking (MMI VI)
Dhing / Strong shaking (MMI VI)
Guwahati / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
Tezpur / Very strong shaking (MMI VII) / horizontal (sideways) swinging / 5-10 s
Tezpur / Moderate shaking (MMI V) / 5-10 s
Ahomgaon guwahati / Moderate shaking (MMI V) : Yes I felt it  
Salonibari / Strong shaking (MMI VI) / both vertical and horizontal swinging / 5-10 s
26.71°N / 92.63°E / Light shaking (MMI IV)
Tezpur / Moderate shaking (MMI V) : Buildings shook, people came out, they were trembling and shocked. Long  
Tezpur / Light shaking (MMI IV) / very short
Tezpur / Strong shaking (MMI VI) / rattling, vibrating / 5-10 s
Tezpur / Moderate shaking (MMI V) / horizontal (sideways) swinging / 5-10 s
Accoland / Strong shaking (MMI VI)
Guwahati / Light shaking (MMI IV) / rattling, vibrating / 1-2 s
Tezpur / Moderate shaking (MMI V) / 5-10 s
Guwahati / Light shaking (MMI IV) / 15-20 s : Nervy  
Jorhat / Weak shaking (MMI III)
Tezpur / Moderate shaking (MMI V)
Jakhalabandha / Moderate shaking (MMI V)
Tezpur / Strong shaking (MMI VI)
Tezpur / Moderate shaking (MMI V) / single lateral shake / 2-5 s
Tezpur assam / Strong shaking (MMI VI)
Missamari / Strong shaking (MMI VI) / rattling, vibrating / 2-5 s
Shillong / Weak shaking (MMI III) / rattling, vibrating / 2-5 s
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