Current time zone offset : UTC/GMT +3 hours:

29 August 2016

REVISION: Mw 7.1 NORTH OF ASCENSION ISLAND 955 km NW Georgetown (as 29/08/2016 04:29 (UTC)

Centre Sismologique Euro-Mediterraneen
European-Mediterranean Seismological Centre

Rapid Determination of Source Parameters
operated at LDG (Paris) and IGN (Madrid)

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==================== INFORMATION MESSAGE =========================
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THIS MESSAGE IS A REVISION OF A PREVIOUS EMSC ALERT
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EARTHQUAKE on 29/08/2016 at 04:29 (UTC)
NORTH OF ASCENSION ISLAND 955 km NW Georgetown (as

MAGNITUDE: Mw 7.1

Data provided by: AUST BUC GFZ IMP INGV LDG LED MAD NEIC NEWS
SC3

Latitude = 0.04 S
Longitude = 17.81 W
Origin Time = 04:29:59.3 (UTC)
Depth = 19 Km
RMS = 1.15 sec
Gap = 22 degrees
95% confidence ellipse: - Semi major = 4.4 Km
- Semi minor = 2.5 Km
- Azimuth of major axis = 137 degrees

Number of data used = 609

Preliminary location computed on Mon Aug 29 05:23:09 2016 (UTC)
Done by Gilles Mazet-Roux

Comments :

Message number: 2343

All magnitudes estimations :
M 7.1 (AUST) Mb6.5 (BUC) Mw7.0 (GFZ) Mw6.8 (INGV)
MB5.6 (LDG) MB6.4 (LED) Mw7.1 (NEIC) Mb4.4 (NEWS)
M 6.9 (SC3)

P.S.: For additional information, please contact EMSC at:
- Email: mazet@emsc-csem.org
- Web : http://www.emsc-csem.org (maps available)
- Fax : 33 1 69 26 70 00

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