Earthquake with magnitude of Md 2.0 on date 18-09-1987 and time 13:33:15 (Italy) in region 2 km N Roaschia (CN)

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

  • 18-09-1987 11:33:15 (UTC)
  • 18-09-1987 13:33:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.29, 7.46 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
Roaschia CN 2 107 107
Roccavione CN 4 2761 2868
Robilante CN 5 2306 5174
Valdieri CN 5 935 6109
Borgo San Dalmazzo CN 5 12468 18577
Roccasparvera CN 6 741 19318
Moiola CN 6 234 19552
Gaiola CN 7 582 20134
Entracque CN 7 774 20908
Vernante CN 8 1178 22086
Vignolo CN 8 2600 24686
Rittana CN 8 109 24795
Valloriate CN 9 109 24904
Boves CN 9 9835 34739
Cervasca CN 11 5013 39752
Bernezzo CN 11 4104 43856
Demonte CN 13 2003 45859
Limone Piemonte CN 14 1485 47344
Peveragno CN 14 5543 52887
Cuneo CN 14 56081 108968
Caraglio CN 15 6836 115804
Valgrana CN 15 786 116590
Monterosso Grana CN 17 505 117095
Beinette CN 18 3423 120518
Montemale di Cuneo CN 18 241 120759
Chiusa di Pesio CN 18 3676 124435
Aisone CN 19 248 124683
Pradleves CN 20 250 124933

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km SW of Cuneo (56081 inhabitants)
58 Km NW of Sanremo (54807 inhabitants)
81 Km S of Moncalieri (57294 inhabitants)
82 Km W of Savona (61345 inhabitants)
89 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 1987-09-18
11:33:15
44.29 7.46 16 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 55659
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-09-18 11:33:15 ± 0.368
Latitude 44.29 ± 0.02
Longitude 7.46 ± 0.03
Depth (km) 16 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 55659

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) 2859.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
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) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.00534
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 55659
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:53:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.IMI.Z. 1987-09-18T11:33:33.30 10.0 undecidable manual SG 140 0.0044 -0.12 0.7
--.FIN.Z. 1987-09-18T11:33:33.80 10.0 undecidable manual SG 98 0.0049 -1.31 0
--.CKI.Z. 1987-09-18T11:33:28.50 10.0 undecidable manual PG 77 0.0053 0.57 0.8
--.ROB.Z. 1987-09-18T11:33:28.20 10.0 undecidable manual SG 87 0.0027 0.85 0.2
--.PZZ.Z. 1987-09-18T11:33:27.40 10.0 undecidable manual SG 310 0.003 -1.01 0.1
--.FIN.Z. 1987-09-18T11:33:26.40 10.0 undecidable manual PG 98 0.0049 -0.47 1
--.DOI.Z. 1987-09-18T11:33:26.50 10.0 undecidable manual SG 324 0.0023 0.27 0.7
--.IMI.Z. 1987-09-18T11:33:26.10 10.0 undecidable manual PG 140 0.0044 0.21 1.6
--.PZZ.Z. 1987-09-18T11:33:23.40 10.0 undecidable manual PG 310 0.003 0.4 1.5
--.ROB.Z. 1987-09-18T11:33:22.30 10.0 undecidable manual PG 87 0.0027 -0.08 2
--.DOI.Z. 1987-09-18T11:33:21.50 10.0 undecidable manual PG 324 0.0023 -0.24 1.8
--.STV.Z. 1987-09-18T11:33:21.60 10.0 undecidable manual SG 247 0.0008 -0.23 0.7
--.STV.Z. 1987-09-18T11:33:19.40 10.0 undecidable manual PG 247 0.0008 0.2 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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