Earthquake with magnitude of Md 2.0 on date 24-04-1987 and time 11:24:01 (Italy) in region 2 km E Roaschia (CN)

A magnitude Md 2.0 earthquake occured in region: 2 km E Roaschia (CN), on

  • 24-04-1987 09:24:01 (UTC)
  • 24-04-1987 11:24:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.27, 7.48 at 10 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 2 107 107
Robilante CN 4 2306 2413
Roccavione CN 5 2761 5174
Vernante CN 6 1178 6352
Borgo San Dalmazzo CN 6 12468 18820
Valdieri CN 6 935 19755
Entracque CN 7 774 20529
Roccasparvera CN 8 741 21270
Moiola CN 9 234 21504
Boves CN 9 9835 31339
Gaiola CN 9 582 31921
Vignolo CN 10 2600 34521
Rittana CN 11 109 34630
Valloriate CN 11 109 34739
Limone Piemonte CN 11 1485 36224
Cervasca CN 12 5013 41237
Peveragno CN 13 5543 46780
Bernezzo CN 13 4104 50884
Cuneo CN 15 56081 106965
Demonte CN 15 2003 108968
Caraglio CN 17 6836 115804
Valgrana CN 17 786 116590
Beinette CN 17 3423 120013
Chiusa di Pesio CN 17 3676 123689
Monterosso Grana CN 19 505 124194

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km SW of Cuneo (56081 inhabitants)
56 Km NW of Sanremo (54807 inhabitants)
80 Km W of Savona (61345 inhabitants)
83 Km S of Moncalieri (57294 inhabitants)
90 Km S of Torino (890529 inhabitants)
90 Km SW of Asti (76202 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 1987-04-24
09:24:01
44.27 7.48 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 45549
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-24 09:24:01 ± 0.047
Latitude 44.27 ± 0.00
Longitude 7.48 ± 0.00
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 45549

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) 608
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
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) 0.00089
Epicentral distance of station farthest from the epicenter (degree) 0.00469
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 45549
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:44:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FIN.Z. 1987-04-24T09:24:20.40 10.0 undecidable manual SG 96 0.0047 0.09 0.3
--.IMP.Z. 1987-04-24T09:24:18.40 10.0 undecidable manual SG 139 0.0041 0.1 0.5
--.SOO.Z. 1987-04-24T09:24:14.80 10.0 undecidable manual SG 310 0.0032 0.04 0.8
--.FIN.Z. 1987-04-24T09:24:12.00 10.0 undecidable manual PG 96 0.0047 -0.34 0.2
--.DA9.Z. 1987-04-24T09:24:12.50 10.0 undecidable manual SG 324 0.0025 0.02 1.1
--.ROB.Z. 1987-04-24T09:24:12.50 10.0 undecidable manual SG 83 0.0025 -0.01 0.6
--.IMP.Z. 1987-04-24T09:24:11.10 10.0 undecidable manual PG 139 0.0041 -0.08 1.6
--.SOO.Z. 1987-04-24T09:24:09.10 10.0 undecidable manual PG 310 0.0032 -0.04 2
--.DA9.Z. 1987-04-24T09:24:07.70 10.0 undecidable manual PG 324 0.0025 -0.12 1.7
--.ROB.Z. 1987-04-24T09:24:07.90 10.0 undecidable manual PG 83 0.0025 0.06 1.2
--.STV.Z. 1987-04-24T09:24:06.80 10.0 undecidable manual SG 258 0.0009 -0.08 0.6
--.STV.Z. 1987-04-24T09:24:04.70 10.0 undecidable manual PG 258 0.0009 0.11 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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