ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Md 2.1 on date 03-12-1985 and time 14:58:20 (Italy) in region 2 km E Cairo Montenotte (SV)

A magnitude Md 2.1 earthquake occured in region: 2 km E Cairo Montenotte (SV), on

  • 03-12-1985 13:58:20 (UTC)
  • 03-12-1985 14:58:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.4, 8.29 at 7 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
Cairo Montenotte SV 2 13269 13269
Carcare SV 4 5587 18856
Cosseria SV 6 1105 19961
Plodio SV 6 650 20611
Dego SV 6 1985 22596
Cengio SV 7 3563 26159
Pallare SV 8 923 27082
Millesimo SV 8 3383 30465
Altare SV 8 2108 32573
Roccavignale SV 9 752 33325
Giusvalla SV 10 441 33766
Piana Crixia SV 10 788 34554
Saliceto CN 10 1323 35877
Mallare SV 12 1146 37023
Montezemolo CN 12 259 37282
Gottasecca CN 12 148 37430
Pontinvrea SV 13 847 38277
Camerana CN 13 631 38908
Castelnuovo di Ceva CN 14 110 39018
Merana AL 14 189 39207
Murialdo SV 14 841 40048
Castelletto Uzzone CN 14 331 40379
Bormida SV 14 387 40766
Mioglia SV 14 526 41292
Osiglia SV 15 444 41736
Quiliano SV 15 7232 48968
Pareto AL 15 554 49522
Prunetto CN 16 451 49973
Stella SV 16 3009 52982
Monesiglio CN 16 645 53627
Priero CN 16 529 54156
Sale delle Langhe CN 17 486 54642
Spigno Monferrato AL 17 1050 55692
Sale San Giovanni CN 17 183 55875
Serole AT 18 123 55998
Savona SV 18 61345 117343
Pezzolo Valle Uzzone CN 18 344 117687
Gorzegno CN 18 304 117991
Perlo CN 18 116 118107
Vado Ligure SV 18 8336 126443
Paroldo CN 18 211 126654
Sassello SV 18 1777 128431
Albisola Superiore SV 18 10163 138594
Albissola Marina SV 18 5487 144081
Mombarcaro CN 18 268 144349
Bergolo CN 19 71 144420
Levice CN 19 231 144651
Vezzi Portio SV 19 809 145460
Nucetto CN 20 430 145890
Rialto SV 20 564 146454
Mombaldone AT 20 209 146663
Orco Feglino SV 20 890 147553

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km NW of Savona (61345 inhabitants)
51 Km W of Genova (586655 inhabitants)
57 Km S of Asti (76202 inhabitants)
59 Km E of Cuneo (56081 inhabitants)
63 Km SW of Alessandria (93943 inhabitants)
76 Km NE of Sanremo (54807 inhabitants)
83 Km SE of Moncalieri (57294 inhabitants)
90 Km SE 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 2.1 1985-12-03
13:58:20
44.4 8.29 7 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 17369
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-12-03 13:58:20 ± 0.191
Latitude 44.40 ± 0.01
Longitude 8.29 ± 0.01
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 17369

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) 1420.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 223
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.00016
Epicentral distance of station farthest from the epicenter (degree) 0.00502
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 17369
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:20:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.IMP.Z. 1985-12-03T13:58:40.70 10.0 undecidable manual SG 211 0.005 -0.48 0
--.ROB.Z. 1985-12-03T13:58:33.20 10.0 undecidable manual SG 252 0.0028 0.12 0.5
--.IMP.Z. 1985-12-03T13:58:32.60 10.0 undecidable manual PG 211 0.005 0.07 1
--.FIN.Z. 1985-12-03T13:58:28.50 10.0 undecidable manual SG 198 0.0017 -0.17 0.4
--.ROB.Z. 1985-12-03T13:58:27.90 10.0 undecidable manual PG 252 0.0028 0.05 1.5
--.FIN.Z. 1985-12-03T13:58:25.50 10.0 undecidable manual PG 198 0.0017 0.19 0.9
--.CKI.Z. 1985-12-03T13:58:23.00 10.0 undecidable manual SG 334 0.0002 -0.25 0.3
--.CKI.Z. 1985-12-03T13:58:22.20 10.0 positive manual PG 334 0.0002 0.02 3.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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