Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of M 2.0 on date 05-04-1987 and time 09:54:47 (UTC) in region 1 km SW Gignod (AO)

A magnitude M 2.0 earthquake occured in region: 1 km SW Gignod (AO), on

  • 05-04-1987 09:54:47 (UTC)
  • 05-04-1987 11:54:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.7700, 7.2850 at 9 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Gignod AO 1 1710 1710
Roisan AO 3 1036 2746
Aosta AO 5 34390 37136
Allein AO 5 229 37365
Gressan AO 5 3387 40752
Doues AO 6 510 41262
Sarre AO 6 4927 46189
Saint-Christophe AO 6 3432 49621
Jovençan AO 6 736 50357
Charvensod AO 6 2468 52825
Etroubles AO 7 501 53326
Pollein AO 7 1569 54895
Valpelline AO 7 657 55552
Saint-Pierre AO 8 3165 58717
Aymavilles AO 8 2086 60803
Saint-Oyen AO 8 203 61006
Ollomont AO 9 157 61163
Villeneuve AO 9 1289 62452
Saint-Rhémy-en-Bosses AO 10 338 62790
Brissogne AO 11 1008 63798
Saint-Nicolas AO 11 311 64109
Quart AO 11 4039 68148
Introd AO 11 658 68806
Arvier AO 12 873 69679
Oyace AO 12 219 69898
Avise AO 13 305 70203
Saint-Marcel AO 13 1362 71565
Nus AO 15 2984 74549
Bionaz AO 16 236 74785
Rhêmes-Saint-Georges AO 16 194 74979
La Salle AO 17 2087 77066
Fénis AO 17 1813 78879
Cogne AO 19 1417 80296
Morgex AO 19 2104 82400
Verrayes AO 19 1302 83702

Municipalities with at least 50000 inhabitants

An earthquake occurred to
83 Km NW of Torino (890529 inhabitants)
91 Km NW of Moncalieri (57294 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		M 2.0 1987-04-05
09:54:47		 45.77 7.285 9 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 44249
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-05 09:54:47 ± 0.646
Latitude 45.7700 ± 0.0123
Longitude 7.2850 ± 0.0217
Depth (km) 9 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 44249

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 2169.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.01036
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

M:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 44249
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:50:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.TMA.Z. 1987-04-05T09:55:26.60 10.0 undecidable manual SN 72 1.1544 0.37 0.4
--.STG.Z. 1987-04-05T09:55:23.40 10.0 undecidable manual SN 317 1.0434 -0.29 0.4
--.TMA.Z. 1987-04-05T09:55:11.00 10.0 undecidable manual PN 72 1.1544 0.94 0.4
--.STG.Z. 1987-04-05T09:55:09.60 10.0 undecidable manual PN 317 1.0434 1.01 0.4
--.RSP.Z. 1987-04-05T09:55:09.20 10.0 undecidable manual SG 181 0.6105 -0.79 0.3
--.MMK.Z. 1987-04-05T09:55:06.30 10.0 undecidable manual SG 59 0.5439 -1.49 0.1
--.ORX.Z. 1987-04-05T09:55:05.60 10.0 undecidable manual SG 105 0.4995 -0.76 0.4
--.LPL.Z. 1987-04-05T09:55:03.80 10.0 undecidable manual SG 236 0.4551 -1.16 0.2
--.LPG.Z. 1987-04-05T09:55:03.60 10.0 undecidable manual SG 234 0.4551 -1.36 0.1
--.RSP.Z. 1987-04-05T09:55:01.00 10.0 undecidable manual PG 181 0.6105 0.32 1.5
--.EMS.Z. 1987-04-05T09:55:01.30 10.0 undecidable manual SG 320 0.3885 -1.27 0.1
--.MMK.Z. 1987-04-05T09:54:59.40 10.0 undecidable manual PG 59 0.5439 -0.02 1.7
--.DIX.Z. 1987-04-05T09:54:59.20 10.0 undecidable manual SG 15 0.3108 -1.27 0.1
--.LSD.Z. 1987-04-05T09:54:59.50 10.0 undecidable manual SG 196 0.3219 -1.08 0.3
--.LPG.Z. 1987-04-05T09:54:58.30 10.0 undecidable manual PG 234 0.4551 0.52 1.3
--.LPL.Z. 1987-04-05T09:54:58.40 10.0 undecidable manual PG 236 0.4551 0.62 1.1
--.ORX.Z. 1987-04-05T09:54:58.90 10.0 undecidable manual PG 105 0.4995 0.31 1.5
--.EMS.Z. 1987-04-05T09:54:56.50 10.0 undecidable manual PG 320 0.3885 0.1 3.4
--.DIX.Z. 1987-04-05T09:54:55.20 10.0 undecidable manual PG 15 0.3108 0.01 3.4
--.LSD.Z. 1987-04-05T09:54:55.60 10.0 undecidable manual PG 196 0.3219 0.35 3
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download