Earthquake with magnitude of Md 2.0 on date 20-08-1987 and time 20:44:16 (Italy) in region 3 km SW Rhêmes Notre Dame (AO)

A magnitude Md 2.0 earthquake occured in region: 3 km SW Rhêmes Notre Dame (AO), on

  • 20-08-1987 18:44:16 (UTC)
  • 20-08-1987 20:44:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 45.56, 7.09 at 16 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Rhêmes-Notre-Dame AO 3 89 89
Valgrisenche AO 9 196 285
Valsavarenche AO 10 161 446
Rhêmes-Saint-Georges AO 12 194 640
Introd AO 17 658 1298
Ceresole Reale TO 17 156 1454
Avise AO 18 305 1759
Arvier AO 18 873 2632
Villeneuve AO 19 1289 3921
Saint-Nicolas AO 19 311 4232

Municipalities with at least 50000 inhabitants

An earthquake occurred to
71 Km NW of Torino (890529 inhabitants)
77 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
Rev 1000 Md 2.0 1987-08-20
18:44:16
45.56 7.09 16 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 54259
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-08-20 18:44:16 ± 0.391
Latitude 45.56 ± 0.02
Longitude 7.09 ± 0.03
Depth (km) 16 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 54259

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) 3394.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 232
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00089
Epicentral distance of station farthest from the epicenter (degree) 0.00599
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 54259
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:52:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RRL.Z. 1987-08-20T18:44:39.20 10.0 undecidable manual SG 199 0.006 -1 0
--.ORO.Z. 1987-08-20T18:44:38.24 10.0 undecidable manual SG 83 0.0056 -0.48 0.3
--.BNI.Z. 1987-08-20T18:44:37.70 10.0 undecidable manual SG 210 0.0052 -0.25 0.6
--.RSP.Z. 1987-08-20T18:44:32.20 10.0 undecidable manual SG 164 0.0037 0 0.7
--.RRL.Z. 1987-08-20T18:44:30.30 10.0 undecidable manual PG 199 0.006 0.05 1.5
--.ORO.Z. 1987-08-20T18:44:29.15 10.0 undecidable manual PG 83 0.0056 -0.24 1.3
--.BNI.Z. 1987-08-20T18:44:28.47 10.0 undecidable manual PG 210 0.0052 -0.11 1.6
--.RSP.Z. 1987-08-20T18:44:26.40 10.0 undecidable manual PG 164 0.0037 0.77 0.3
--.LSD.Z. 1987-08-20T18:44:22.60 10.0 undecidable manual SG 155 0.0009 -0.55 0.3
--.LSD.Z. 1987-08-20T18:44:20.60 10.0 undecidable manual PG 155 0.0009 0.2 3.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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