Moderate but shallow earthquake 50 km from Dar Es Salaam area, Tanzania

The coastline near Dar Es Salaam at epicenter of the June 10 2011 earthquake - Panoramio picture by Tatochka -

UPDATE 10:12 UTC : So far we have not yet a report from the direct epicenter area. We do expect based on the experience reports from Dar Es Salaam that also the coastal epicenter area will not be damaged. Another uncertain aspect is the exact location of the epicenter (sometimes an error of 10 to 30 km!), which might be more out in the sea and could explain the limited shaking we could trace so far.

Felt Reports as received by :
Dar Es Salaam : I am on the 9th floor of one of the buildings in Dar es Salaam.  I together with several of my fellow staff felt a light wave. However some of the other staff when we asked them said they did not feel anything. In fact those who did not feel anything made fun of us until this article was posted on your website.
Dar Es Salaam : I have been thru a earthquake of 8.1 magnitude in Gujarat (India) and hence i immediately felt the swaying/cradling twice which were just seconds apart (Light shaking checked)
Dar Es Salaam : very light on the ground floor felt chair shacking mildly...... than got a call from dad who lives 3rd floor and they felt it too..... (Weak shaking checked)
Dar Es Salaam : I am currently in my office on the 8th floor of my building located in the center of Dar es Salaam. When the quake happend i felt a gentle rocking of my chair followed by a gentle swaying of the building from side to side, which lasted for 1 minute or so then a sudden stop. So far no after shocks have been felt and everything feel normal. (Light shaking checked)
Kariakoo, Dar Es Salaam : Felt two waves on the second floor office on Lumumba in Kariakoo. The first being more acute than the other. (Light shaking checked)
Dar Es Salaam : On the first floor of a building felt 2 distinct tremors a second apart. (Light shaking checked)
Dar Es Salaam : I was studying while seated on the floor and felt the tremors. My tea in the cup was unsettled
Dar Es Salaam : I was sitting on my office which is located on the first floor and i felt a light shaking for atleast a second
Dar Es Salaam : I work on a building which is 13th floor in Dar - Es - Salaam and we felt a small shake..
Dar Es Salaam : I was on the 5th floor of one of the buildings in Dar es Salaam, Azikiwe street at the city center. I felt some light shaking of my body, only to realize later that everything around me was shaking as well. I had headphones on, so I didnt feel the sounds but I could see the furniture shake a bit. The building has several offices and most of the staff ran towards the gate. A few staff says they did not feel it but the majority did. The tremor lasted for about 50 seconds to one minute

UPDATE 09:52 UTC : After some more calls to the Dar Es Salaam area we could NOT detect any serious shaking, although a 4.8 magnitude earthquake should have been noticed very well at 50 km distance. We are currently looking for more details.

UPDATE 09:48 UTC : After calling a number of places in Dar Es Salaam (approx. 50 km from the epicenter), the people we talked too had or not felt any shaking or the shaking was only felt on the upper floors.

UPDATE 09:22 UTC : First reports out of Dar Es Salaam to are indicating a MMI IV = light shaking

UPDATE 09:22 UTC : Data from other seismological agencies :  EMSC :  4.8 @ 10 km depth

Around noon, a very shallow coastal earthquake occurred at a short distance from Dar Es Salaam. As the area has only very few earthquakes in the past people have been scared by the shaking.

Most important Earthquake Data:
Magnitude : 4.8
UTC Time :  Friday, June 10, 2011 at 08:28:13 UTC
Local time at epicenter :  Friday, June 10, 2011 at 11:28:13 AM at epicenter
Depth (Hypocenter) : 10 km
Geo-location(s) :
Epicenter almost below Buuni Village
very close to Vikundu
44 km (28 miles) SE (125°) from DAR ES SALAAM, Tanzania

Links to important maps
USGS Did You Feel It Map
Google satellite map of the area showing the kind of terrain the earthquake took place
USGS historic earthquakes map
USGS Seismic hazard map

QuakeSOS+ and QuakeSOS free are iPhone applications developed by Armand Vervaeck, the founder of Earthquake Report. The Application simplifies immediate group communication to friends and family members (with your exact GPS location) and is feeding the users with Earthquake Report news. The 0.99 US$ QuakeSOS+ version will support the activities of SOS Earthquakes.

a headlines on twitter
@OnlyQuakeNews : Get all the headlines of our articles + regular updates on ongoing events
@QuakeSOS : news + automatic earthquake notifications of USGS earthquakes of M 4.0 or higher with emphasis to earthquakes in the America's and the Pacific Ocean sphere (4 and up) and a lot of the rest of the world (5 and up). This account was created for our QuakeSOS and QuakeSOS+ iPhone applications
@ShakingEarth : news + automatic earthquake notifications of EMSC earthquakes of M 4.0 or higher with emphasis to earthquakes in European and Asian / Middle East sphere (4 and up) and a lot of the rest of the world (5 and up). This account was originally created to stimulate our Facebook account
@QuakeMaps : news with mapping notifications of ALL earthquakes M 3.0 and higher from all over the world via EMSC and USGS. This account was created for our website

I did feel it – Ik heb het gevoeld – Το έκανα αισθάνεται – Yo lo siento – 我的确感到了 – 私はそれを感じていました- Ich habe es gefühlt – Bunu hissediyorum yaptı – لم أشعر أنه


  1. Good to hear that only minor reports are coming in and nothing more serious

    • Armand Vervaeck says:

      We have no bad news but NO news at all, which could mean a very positive signal like you say. Let us hope it.

  2. I was in my office desk reading when I felt the chair shaking, First I thought it could be caused by the construction site in the neighbourhood but it was different, it went on for 3 seconds.. Some of my collegues felt it most of them didn't