ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Md 2.0 on date 23-03-1986 and time 22:44:53 (Italy) in region 4 km S Monterosso Grana (CN)

A magnitude Md 2.0 earthquake occured in region: 4 km S Monterosso Grana (CN), on

  • 23-03-1986 21:44:53 (UTC)
  • 23-03-1986 22:44:53 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.37, 7.32 at 14 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
Monterosso Grana CN 4 505 505
Valloriate CN 6 109 614
Demonte CN 6 2003 2617
Pradleves CN 6 250 2867
Valgrana CN 7 786 3653
Rittana CN 7 109 3762
Moiola CN 8 234 3996
Gaiola CN 8 582 4578
Montemale di Cuneo CN 9 241 4819
Bernezzo CN 9 4104 8923
Castelmagno CN 10 66 8989
Roccasparvera CN 10 741 9730
Aisone CN 10 248 9978
Caraglio CN 10 6836 16814
Dronero CN 11 7035 23849
Cervasca CN 12 5013 28862
Valdieri CN 12 935 29797
Vignolo CN 12 2600 32397
Roccabruna CN 12 1585 33982
Cartignano CN 12 190 34172
Villar San Costanzo CN 14 1547 35719
Vinadio CN 14 644 36363
Borgo San Dalmazzo CN 14 12468 48831
Roccavione CN 14 2761 51592
San Damiano Macra CN 14 430 52022
Roaschia CN 15 107 52129
Entracque CN 16 774 52903
Celle di Macra CN 17 100 53003
Robilante CN 17 2306 55309
Macra CN 18 59 55368
Cuneo CN 19 56081 111449
Boves CN 19 9835 121284
Sambuco CN 20 92 121376
Valmala CN 20 52 121428

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km W of Cuneo (56081 inhabitants)
71 Km NW of Sanremo (54807 inhabitants)
76 Km SW of Moncalieri (57294 inhabitants)
83 Km SW of Torino (890529 inhabitants)
91 Km SW of Asti (76202 inhabitants)
93 Km W of Savona (61345 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 1986-03-23
21:44:53
44.37 7.32 13 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 24799
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-03-23 21:44:53 ± 0.35
Latitude 44.37 ± 0.02
Longitude 7.32 ± 0.02
Depth (km) 13 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 24799

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) 2684.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00105
Epicentral distance of station farthest from the epicenter (degree) 0.00356
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 1
Type of magnitude Md
Reference to an origin 24799
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:26:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ROB.Z. 1986-03-23T21:45:08.10 10.0 undecidable manual SG 99 0.0036 -0.24 0.3
--.ROB.Z. 1986-03-23T21:45:02.00 10.0 undecidable manual PG 99 0.0036 -0.09 1.1
--.SOO.Z. 1986-03-23T21:45:01.80 10.0 undecidable manual SG 310 0.0019 -0.48 0.1
--.ENR.Z. 1986-03-23T21:45:00.70 10.0 undecidable manual SG 153 0.0014 -0.19 0.9
--.STV.Z. 1986-03-23T21:44:59.40 10.0 undecidable manual SG 177 0.0011 -0.38 0.3
--.SOO.Z. 1986-03-23T21:44:58.40 10.0 undecidable manual PG 310 0.0019 -0.19 1.3
--.DA9.Z. 1986-03-23T21:44:58.00 10.0 undecidable manual PG 337 0.0012 0.48 0.4
--.STV.Z. 1986-03-23T21:44:57.30 10.0 undecidable manual PG 177 0.0011 0.15 1.2
--.ENR.Z. 1986-03-23T21:44:57.90 10.0 undecidable manual PG 153 0.0014 0.12 3.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download