Earthquake with magnitude of Md 2.0 on date 01-04-1987 and time 11:54:27 (Italy) in region 5 km S Roaschia (CN)

A magnitude Md 2.0 earthquake occured in region: 5 km S Roaschia (CN), on

  • 01-04-1987 09:54:27 (UTC)
  • 01-04-1987 11:54:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.23, 7.46 at 17 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
Roaschia CN 5 107 107
Entracque CN 5 774 881
Vernante CN 6 1178 2059
Valdieri CN 8 935 2994
Robilante CN 9 2306 5300
Limone Piemonte CN 10 1485 6785
Roccavione CN 10 2761 9546
Borgo San Dalmazzo CN 12 12468 22014
Moiola CN 12 234 22248
Gaiola CN 13 582 22830
Roccasparvera CN 13 741 23571
Boves CN 14 9835 33406
Valloriate CN 14 109 33515
Rittana CN 15 109 33624
Vignolo CN 15 2600 36224
Demonte CN 16 2003 38227
Peveragno CN 17 5543 43770
Cervasca CN 18 5013 48783
Bernezzo CN 18 4104 52887
Cuneo CN 20 56081 108968

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km SW of Cuneo (56081 inhabitants)
52 Km NW of Sanremo (54807 inhabitants)
82 Km W of Savona (61345 inhabitants)
88 Km S of Moncalieri (57294 inhabitants)
95 Km SW of Asti (76202 inhabitants)
96 Km S of Torino (890529 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 1987-04-01
09:54:27
44.23 7.46 17 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 43909
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-01 09:54:27 ± 0.237
Latitude 44.23 ± 0.01
Longitude 7.46 ± 0.01
Depth (km) 17 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 43909

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) 1875.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.00478
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 43909
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:43:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FIN.Z. 1987-04-01T09:54:46.40 10.0 undecidable manual SG 91 0.0048 -0.14 0.4
--.IMP.Z. 1987-04-01T09:54:42.70 10.0 undecidable manual SG 134 0.0039 -0.75 0
--.SOO.Z. 1987-04-01T09:54:41.60 10.0 undecidable manual SG 317 0.0034 -0.01 0.6
--.ROB.Z. 1987-04-01T09:54:39.20 10.0 undecidable manual SG 75 0.0027 -0.08 0.6
--.FIN.Z. 1987-04-01T09:54:38.70 10.0 undecidable manual PG 91 0.0048 0.3 0.7
--.DA9.Z. 1987-04-01T09:54:38.80 10.0 undecidable manual SG 330 0.0028 -0.89 0
--.IMP.Z. 1987-04-01T09:54:36.60 10.0 undecidable manual PG 134 0.0039 -0.02 1.4
--.SOO.Z. 1987-04-01T09:54:35.70 10.0 undecidable manual PG 317 0.0034 0.14 1.4
--.DA9.Z. 1987-04-01T09:54:34.40 10.0 undecidable manual PG 330 0.0028 -0.05 1.6
--.ROB.Z. 1987-04-01T09:54:34.40 10.0 undecidable manual PG 75 0.0027 0.18 1.3
--.STV.Z. 1987-04-01T09:54:33.90 10.0 undecidable manual SG 284 0.0008 0.13 0.9
--.STV.Z. 1987-04-01T09:54:31.10 10.0 undecidable manual PG 284 0.0008 0.07 3.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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