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Strong mag. 6.0 earthquake - Tanzania on Wednesday, 12 August 2020 - information

Strong mag. 6.0 earthquake - Indian Ocean, 88 km southeast of Dar es Salaam, Tanzania, on Wednesday, August 12, 2020 at 17:13 GMT

Strong mag. 6.0 earthquake - Indian Ocean, 88 km southeast of Dar es Salaam, Tanzania, on Wednesday, August 12, 2020 at 17:13 GMT Strong mag. 6.0 earthquake - Indian Ocean, 88 km southeast of Dar es Salaam, Tanzania, on Wednesday, August 12, 2020 at 17:13 GMT

Strong magnitude 6.0 earthquake at 25 km depth

12 Aug 17:22 UTC: First to report: GFZ after 9 minutes.
Aug 12 17:24: Magnitude recalculated from 5.9 to 6.0.
Hypocenter depth recalculated from 10.0 to 25.0 km.
Update Thu, 13 Aug 2020, 08:30

Quake was strongest in region since at least 2016, but no significant damage

User-reports with location and shaking intensity
User-reports with location and shaking intensity
Luckily, even after 15 hours since the magnitude 6.0 earthquake struck near Tanzania's coast last night, there are no reports of serious damage or injuries. Had the quake occurred closer to the shore, it probably would have had a much more severe outcome.
USGS models estimates that almost 9 million people felt the earthquake, mostly as weak to mild shaking, while 59,000 people in the areas closest to the epicenter felt it at moderate intensity. This fits nicely into the user-generated shake map, based on the more than 800 reports we received so far.
Last night's tremor was the strongest earthquake in the region since 10 September 2016, when a similarly strong earthquake hit northwest Tanzania, killing at least 17 people and injuring more than 400.
Update Wed, 12 Aug 2020, 17:56
People near the epicenter reported that the quake came in two waves; first there was "around 8 to 10 seconds of vibration and then a 2 second long shock", a user told us.
Within 30 minutes, more than 200 reports have come in so far. The interactive map below plots location and reported intensity, which gives a good idea about the impact of the quake. So far, there are no reports of major damage or injuries, fortunately.
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Earthquake details

Date & timeAug 12, 2020 17:13:17 UTC
Local time at epicenter
StatusConfirmed
Magnitude6
Depth25.0 km
Epicenter latitude / longitude7.37°S / 39.85°E (Indian Ocean, Tanzania)
Antipode7.37°N / 140.15°W
Shaking intensityModerate shaking
Felt945 reports
Primary data sourceGFZ (German Research Centre for Geosciences)
Nearby towns and cities64 km (40 mi) NNE of Kilindoni (Mafia) (pop: 12,400) | Show on map | Quakes nearby
73 km (45 mi) ESE of Vikindu (Mkuranga) (pop: 23,300) | Show on map | Quakes nearby
76 km (47 mi) ESE of Mkwanga (Mkuranga) (pop: 28,000) | Show on map | Quakes nearby
88 km (55 mi) SE of Dar es Salaam (pop: 2,698,700) | Show on map | Quakes nearby
92 km (57 mi) ENE of Bungu (Rufiji) (pop: 27,900) | Show on map | Quakes nearby
108 km (67 mi) ENE of Kibiti (Rufiji) (pop: 30,200) | Show on map | Quakes nearby
123 km (76 mi) ESE of Kibaha (pop: 23,700) | Show on map | Quakes nearby
147 km (91 mi) SE of bajamwyw (pop: 82,400) | Show on map | Quakes nearby
152 km (95 mi) SSE of Zanzibar (pop: 403,700) | Show on map | Quakes nearby
473 km (294 mi) ESE of Dodoma (pop: 180,500) | Show on map | Quakes nearby
146 km (91 mi) SSE of Zanzibar Island (pop: 896,700) | Show on map | Quakes nearby
Estimated seismic energy released6.3 x 1013 joules (17.5 gigawatt hours, equivalent to 15080 tons of TNT or 0.9 atomic bombs!) | about seismic energy
Show interactive Map
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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
6.025 kmTanzaniaGFZ
6.015 kmTanzaniaEMSC
5.910 kmTanzaniaBMKG
6.00.8 kmTanzania [Sea]INGV
5.910 kmTanzaniaGeoAu
6.016 km66 km ESE of Vikindu, TanzaniaUSGS

Seismograms

Seismic station: Kilima Mbogo, Kenya (KMBO/IU network) | Distance from quake: 752 km / 467 mi | Show on map | Station Info
Seismic station Kilima Mbogo, Kenya: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (1030)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Contribute:
Leave a comment if you find a particular report interesting or want to add to it.
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Indian Ocean (30.3 km ESE of epicenter) [Map] / Moderate shaking (MMI V) : I felt the floor was shaking and the utensils plus the bed, cupboard and all the surface felt like a sea wave shaking | One user found this interesting.  
Dar Es salam (75.8 km NW of epicenter) [Map] / Moderate shaking (MMI V) | 3 users found this interesting.  
IMG-202008... .jpg (public domain)
Daressalaam (4 km NNW of epicenter) [Map] / Strong shaking (MMI VI) : On the 14th floor of a 24 storey I felt the strong swing and stepped out of apartment and saw my neighbours rushing out of theirs and told them not to use the lifts but the stairs due to the uncertainty of after shocks. I tried to calm and cons | 10 users found this interesting.  
Arusha, Mbauda (567.7 km NW of epicenter) [Map] / Weak shaking (MMI III) : I was having a conversation with my young brother while having dinner. All of a sudden i felt the couch and follow vibrating. I tol | 8 users found this interesting.  
Kenya mombasa (374.5 km N of epicenter) [Map] / Light shaking (MMI IV) : it w a s the first time I.exprienced this in.mombasa ...scary....a way of god reminding us ....of.his existence and how.weak we truly are | 6 users found this interesting.  
Pemba Island (240.1 km N of epicenter) [Map] / Light shaking (MMI IV) : We were praying isha prayer. Everyone was shaking, after prayer we asked why we were shaking!? Imam said, it was an earthquake. | 5 users found this interesting.  
Kariakoo dar es salaam (56.1 km NW of epicenter) [Map] / Very strong shaking (MMI VII) : I was sitting on the floor and sudden i felt heavy shake or the building and felt that windows might fall on me, fan were about to fall m everything around me.. we had to run downstairs for our safety..first experience of the earthquake | 4 users found this interesting.  
Morogoro (253.6 km W of epicenter) [Map] / Very weak shaking (MMI II) : I was resting on bed on third floor of Antique Legacy Hotel felt some unusual shaking lasting 4+5 seconds but when I got of the bed it was gone. Nothing fell or broke. | 4 users found this interesting.  
Masaki, dar es salaam (92.9 km NW of epicenter) [Map] / Moderate shaking (MMI V) : It woke me from my sleep. I noticed the glass sliding doors shaking. It lasted about 10-15 seconds after I woke up. | 4 users found this interesting.  
Mawenzi Rd, Masaki, Dar Es Salaam (92.5 km NW of epicenter) [Map] / Light shaking (MMI IV) : Two tremors where felt | 3 users found this interesting.  
Dar es Salaam (82.3 km NW of epicenter) [Map] / Very weak shaking (MMI II) : It was a dangerous experience. We ran out of our houses and were standing there for an hour or so. We are alert and ready for any upcoming tremors. | 3 users found this interesting.  
Tanga, Tanga City Council (272.9 km NNW of epicenter) [Map] / Moderate shaking (MMI V) : I was on my bed and i thought someone was playing me, but i was all alone, i realized it was it when it was gone. About 8-10 seconds | 3 users found this interesting.  
dar es salaam, tanzania (92.4 km NW of epicenter) [Map] / Moderate shaking (MMI V) : it was noticeable to every one indoors and outdoors. people were shocked as its something no very familiar, it continued for about 6-9 seconds, with a second or two pause in between | 3 users found this interesting.  
Mliman city (96.3 km NW of epicenter) [Map] / Moderate shaking (MMI V) : At first i did not understand what was causing the shake of the building, then every said it was an earthQuake. | 2 users found this interesting.  
zanzibar (152 km NNW of epicenter) [Map] / Very weak shaking (MMI II) : I felt a light movement of my iPad standing on a coffee table and a slight movement of myself sitting on the sofa | 2 users found this interesting.  
Dar E Salaam, magomeni, haidaru street (79.3 km WNW of epicenter) [Map] / Light shaking (MMI IV) : I was in my bed when it happened and the started bed shaking a bit violently. Then our house maid then came to get be and the whole family evacuated outside in the open. | 2 users found this interesting.  
Dar-es-Salam, Ilala District (86.6 km NW of epicenter) [Map] / Strong shaking (MMI VI) : I felt the sofa shaking, the cabinets shook the house felt like it was moving back and forth. It was a scary experience. I live in Dar es Salaam at Mbezi Beach, Kilongawima, Usalama Road House number 666. | 2 users found this interesting.  
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Mombasa, Kenya (392 km N of epicenter) [Map] / Weak shaking (MMI III) : Slight vibration on my chair. A glass of water on the stool also vibrated which could be seen in the water moving. | 2 users found this interesting.  
ZTabata Island (181.8 km W of epicenter) [Map] / Very strong shaking (MMI VII) : Sittingin a wooded chair,bar | One user found this interesting.  
near Dar-es-Salam, Ilala District (99.7 km NW of epicenter) [Map] / Moderate shaking (MMI V) : I was sitting on a varander at mbezi beach area in Ďar es salaam and felt the chair I was sitting on shake. The table was shaking,there were ripples on my drink | One user found this interesting.  
Dar-es-Salam, Ilala District (88 km NW of epicenter) [Map] / Moderate shaking (MMI V) : Felt moderately shaked for a few seconds, the whole building was shaking and it felt like it was swaying. | One user found this interesting.  
West Upanga, Kalenga street (89.2 km NW of epicenter) [Map] / Light shaking (MMI IV) : My bed was shaking for like 2 secs, and then stopped when I woke up my bed started to shake again then I saw my ,mirror and closet's door shake for about 8 secs then it stopped completely a | One user found this interesting.  
Mombasa (363.8 km N of epicenter) [Map] / Weak shaking (MMI III) : Strongest shaking I have felt since I came to Mombasa. Normally feel other very mild shaking every now and then. | One user found this interesting.  
Mombasa, Kenya (366.9 km N of epicenter) [Map] / Moderate shaking (MMI V) : Being on a high floor, I would describe it as between light and medium shaking, it felt as if the building was swaying. The furniture shook significantly for us to get alarmed and get off it and to think of trying to get out of the building. Ha | One user found this interesting.  
Mombasa Kenya (311.5 km N of epicenter) [Map] / Weak shaking (MMI III) : I was lying on the couch and suddenly I felt a vibration which caused me rock side by side and the house seemed to shake.I got so scared but just when I was about to ran to the door it stopped. | One user found this interesting.  
Misugusugu (128.7 km WNW of epicenter) [Map] / Very weak shaking (MMI II) : At about 20:14-15 while seated on a coach, I felt a slight roof sound immediately followed a body shake, This happened twice at short interval of about 30 seconds. | One user found this interesting.  
Dar-es-Salam, Ilala District (88.9 km NW of epicenter) [Map] / Weak shaking (MMI III) : On 11th floor apt had uneasy feeling of movement bit like a rocking boat but just noticeable. I was not sure what it was so stood on balcony and could see building moving relative to surrounding | One user found this interesting.  
Dar Es Salaam, Ilalla District (88.3 km NW of epicenter) [Map] / Moderate shaking (MMI V) : Slight to moderate shaking in building, no visible damage to building,slight panic behaviour by some people especially children, no break down of electricity or Internet | One user found this interesting.  
near Sansibar, Zanzibar Urban/West (135.6 km NNW of epicenter) [Map] / Very weak shaking (MMI II) : Was napping on the sofa, and felt the sofa moving. Didn’t know if I was dreaming or not, didn’t think much of it. | One user found this interesting.  
Dar es salaam / Violent shaking (MMI IX) | One user found this interesting.  
IMG-202008... .jpg (public domain)
Dar Es Salaam (90.9 km NW of epicenter) [Map] / Moderate shaking (MMI V) : I was on the fourth floor of the apartment, I am writin  
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Aftershocks

[More info]

Recorded aftershocks, latest first (2 quakes)

Date and timeMag
Depth
LocationDetails
Oct 6, 2020 19:11
2 years ago
4.6

10 km
Indian Ocean, 77 km SE of Dar es Salaam, TanzaniaMore
Aug 13, 2020 14:54
2 years ago - felt
5.1

10 km
Indian Ocean, 76 km SE of Dar es Salaam, TanzaniaMore

Earlier earthquakes in the same area

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