Earthquake with magnitude of Md 2.1 on date 17-12-1985 and time 16:31:34 (Italy) in region 2 km SE Cairo Montenotte (SV)

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

  • 17-12-1985 15:31:34 (UTC)
  • 17-12-1985 16:31:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.39, 8.29 at 5 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 3 5587 18856
Cosseria SV 5 1105 19961
Plodio SV 5 650 20611
Cengio SV 6 3563 24174
Pallare SV 7 923 25097
Millesimo SV 7 3383 28480
Dego SV 7 1985 30465
Altare SV 7 2108 32573
Roccavignale SV 8 752 33325
Saliceto CN 10 1323 34648
Mallare SV 11 1146 35794
Giusvalla SV 11 441 36235
Piana Crixia SV 11 788 37023
Montezemolo CN 12 259 37282
Camerana CN 12 631 37913
Gottasecca CN 13 148 38061
Murialdo SV 13 841 38902
Bormida SV 13 387 39289
Castelnuovo di Ceva CN 13 110 39399
Pontinvrea SV 13 847 40246
Osiglia SV 14 444 40690
Castelletto Uzzone CN 14 331 41021
Quiliano SV 14 7232 48253
Merana AL 15 189 48442
Mioglia SV 15 526 48968
Priero CN 16 529 49497
Prunetto CN 16 451 49948
Monesiglio CN 16 645 50593
Pareto AL 16 554 51147
Stella SV 16 3009 54156
Sale delle Langhe CN 16 486 54642
Sale San Giovanni CN 17 183 54825
Perlo CN 17 116 54941
Vado Ligure SV 18 8336 63277
Spigno Monferrato AL 18 1050 64327
Savona SV 18 61345 125672
Paroldo CN 18 211 125883
Albisola Superiore SV 18 10163 136046
Gorzegno CN 18 304 136350
Mombarcaro CN 18 268 136618
Albissola Marina SV 18 5487 142105
Vezzi Portio SV 19 809 142914
Pezzolo Valle Uzzone CN 19 344 143258
Rialto SV 19 564 143822
Serole AT 19 123 143945
Orco Feglino SV 19 890 144835
Nucetto CN 19 430 145265
Sassello SV 19 1777 147042
Levice CN 20 231 147273
Bergeggi SV 20 1129 148402
Bergolo CN 20 71 148473
Massimino SV 20 113 148586

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km W 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)
64 Km SW of Alessandria (93943 inhabitants)
75 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 1985-12-17
15:31:34
44.39 8.29 5 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 18299
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-12-17 15:31:34 ± 0.108
Latitude 44.39 ± 0.00
Longitude 8.29 ± 0.01
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 18299

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) 795.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 211
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.00024
Epicentral distance of station farthest from the epicenter (degree) 0.00672
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:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 18299
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:21:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.DA9.Z. 1985-12-17T15:32:01.50 10.0 undecidable manual SG 279 0.0067 -0.35 0.1
--.STV.Z. 1985-12-17T15:32:00.40 10.0 undecidable manual SG 259 0.0062 0.29 0.2
--.IMP.Z. 1985-12-17T15:31:55.30 10.0 undecidable manual SG 211 0.0049 0 0.8
--.DA9.Z. 1985-12-17T15:31:50.50 10.0 undecidable manual PG 279 0.0067 0.09 1.4
--.STV.Z. 1985-12-17T15:31:49.60 10.0 undecidable manual PG 259 0.0062 0.2 0.9
--.IMP.Z. 1985-12-17T15:31:46.40 10.0 undecidable manual PG 211 0.0049 -0.23 0.8
--.ROB.Z. 1985-12-17T15:31:46.80 10.0 undecidable manual SG 254 0.0028 -0.02 1.3
--.FIN.Z. 1985-12-17T15:31:42.40 10.0 undecidable manual SG 197 0.0016 0.16 0.6
--.ROB.Z. 1985-12-17T15:31:41.50 10.0 undecidable manual PG 254 0.0028 -0.23 0.9
--.FIN.Z. 1985-12-17T15:31:39.10 10.0 undecidable manual PG 197 0.0016 0.02 2.1
--.CKI.Z. 1985-12-17T15:31:36.00 10.0 undecidable manual PG 346 0.0002 0.01 2.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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