M 5.5 in Madagascar on 11 Jan 2017 22:06 UTC

Hazard models

EQ parameters
Shakemap
Tsunami

Event summary

This earthquake is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

Earthquake Magnitude: 5.5M
Depth: 8.7 Km
Lat/Lon: -20.1581 , 46.6332
Event Date: 11 Jan 2017 22:06 UTC
12 Jan 2017 01:06 Local
Exposed Population: About 27000 people in MMI
2350000 people within 100km
Source: NEIC us10007snb
Inserted at: 11 Jan 2017 23:06 UTC
INFORM Coping capacity of the alert score: 7.6 (Madagascar)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0.5 0.5
us10007snb Scaled population (vector) 0  
  C1 earthquake 1  
  C2 earthquake 0  
  Country Vulnerability 0  
  INFORM_normalised 1  
Maximum expected impact using different data sources.

ShakeMap is a product of the USGS Earthquake Hazards Program in conjunction with the regional seismic networks. ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.


Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1153694 1 11 Jan 2017 22:07 5.4M, 14.61km N/A 2.4 million (in 100km) 00:20 NEIC
1153698 0.5 11 Jan 2017 22:06 5.5M, 8.7km N/A N/A (in MMI>=VII) 00:59 NEIC
The episode that generated the alert; the next major evaluations beyond 12 hours will not trigger additional alerts.
The episode that has the last updated information.
* The max MMI detected for sources having shakemaps;
** The population detected in MMI>=7 for episode with shakemap or in a 100km radius;
*** The tsunami max height.

Exposed population

The earthquake happened in Madagascar ,of Antananarivo (population 15,179) . The alertlevel for this event is Green

Intensity Population
15000 people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1153698 -20.158/46.633 5.5 8.7 0 11 Jan 2017 23:07 01:00 (new episode)
2 0 1153698 -20.158/46.633 5.5 8.7 0 12 Jan 2017 00:10 02:03 (upd of #1)

Affected Provinces

Intensity Region Province Country Population
Antananarivo Madagascar 15000 people
Fianarantsoa Madagascar <1000 people
Antananarivo Madagascar 2 million people
Fianarantsoa Madagascar 58000 people

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
Ambohitsara Antananarivo Madagascar Village - 7 km
Landraina Antananarivo Madagascar Village - 13 km
Antsangandrano Fianarantsoa Madagascar Village - 17 km
Andranovory Fianarantsoa Madagascar Village - 21 km
Lazarivo Antananarivo Madagascar Village - 22 km
Ambalavato Antananarivo Madagascar Village - 26 km
Atsimondraiketa Antananarivo Madagascar Village - 26 km
Miarinatsima Antananarivo Madagascar Village - 27 km
Ranofotsy Fianarantsoa Madagascar Village - 33 km
Mahaiza Antananarivo Madagascar Village - 33 km
Betaimboraka Fianarantsoa Madagascar Village - 34 km
Moronarivo Antananarivo Madagascar Village - 36 km
Ambohimahatsinjo Fianarantsoa Madagascar Village - 36 km
Maharivo Fianarantsoa Madagascar Village - 36 km
Ambohimanambola Antananarivo Madagascar Village - 39 km
Soavina Fianarantsoa Madagascar Village - 39 km
Soavina Antanety Antananarivo Madagascar Village - 41 km
Alakamisy Antananarivo Madagascar Village - 41 km
Mangarano Antananarivo Madagascar Village - 42 km
Betafo Antananarivo Madagascar Village 29000 people 43 km
Manandona Antananarivo Madagascar Village - 45 km
Ambatofinandrahana Fianarantsoa Madagascar Village 26000 people 47 km
Tsarafanary Fianarantsoa Madagascar Village - 48 km
Sambalahy Fianarantsoa Madagascar Village - 48 km
Vinanikarena Antananarivo Madagascar Village - 48 km
Mangataboahangy Fianarantsoa Madagascar Village - 48 km
Itremo Fianarantsoa Madagascar Village - 48 km
Ambalavabe Fianarantsoa Madagascar Village - 49 km
Antsirabe Antananarivo Madagascar City 150000 people 53 km
Tanjombato Antananarivo Madagascar Village - 162 km
Tananarive Antananarivo Madagascar Capital 1.4 million people 167 km
Antananarivo Antananarivo Madagascar Capital 1.4 million people 167 km
Ambondrona Antananarivo Madagascar Village - 170 km

see full list


Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

More information

For a full list of available products related to this event, please refer to the GDACS Resources page.