INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of Md 2.0 on date 18-04-1985 and time 16:58:41 (Italy) in region 2 km SW Cairo Montenotte (SV)

A magnitude Md 2.0 earthquake occured in region: 2 km SW Cairo Montenotte (SV), on

  • 18-04-1985 14:58:41 (UTC)
  • 18-04-1985 16:58:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.38, 8.27 at 6 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
Cosseria SV 3 1105 14374
Carcare SV 4 5587 19961
Plodio SV 4 650 20611
Cengio SV 5 3563 24174
Millesimo SV 5 3383 27557
Pallare SV 6 923 28480
Roccavignale SV 6 752 29232
Dego SV 8 1985 31217
Altare SV 8 2108 33325
Saliceto CN 9 1323 34648
Montezemolo CN 10 259 34907
Mallare SV 11 1146 36053
Camerana CN 11 631 36684
Murialdo SV 11 841 37525
Castelnuovo di Ceva CN 11 110 37635
Gottasecca CN 12 148 37783
Piana Crixia SV 12 788 38571
Bormida SV 12 387 38958
Giusvalla SV 12 441 39399
Osiglia SV 13 444 39843
Castelletto Uzzone CN 14 331 40174
Priero CN 14 529 40703
Sale delle Langhe CN 15 486 41189
Pontinvrea SV 15 847 42036
Monesiglio CN 15 645 42681
Merana AL 15 189 42870
Sale San Giovanni CN 15 183 43053
Prunetto CN 15 451 43504
Quiliano SV 15 7232 50736
Perlo CN 16 116 50852
Mioglia SV 16 526 51378
Paroldo CN 16 211 51589
Mombarcaro CN 17 268 51857
Pareto AL 17 554 52411
Nucetto CN 17 430 52841
Gorzegno CN 18 304 53145
Stella SV 18 3009 56154
Massimino SV 18 113 56267
Pezzolo Valle Uzzone CN 18 344 56611
Rialto SV 18 564 57175
Ceva CN 18 5782 62957
Spigno Monferrato AL 19 1050 64007
Vado Ligure SV 19 8336 72343
Vezzi Portio SV 19 809 73152
Serole AT 19 123 73275
Orco Feglino SV 19 890 74165
Savona SV 19 61345 135510
Levice CN 19 231 135741
Torresina CN 19 52 135793
Bergolo CN 19 71 135864
Albissola Marina SV 20 5487 141351
Roascio CN 20 97 141448
Calice Ligure SV 20 1730 143178

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km W of Savona (61345 inhabitants)
53 Km W of Genova (586655 inhabitants)
57 Km E of Cuneo (56081 inhabitants)
58 Km S of Asti (76202 inhabitants)
65 Km SW of Alessandria (93943 inhabitants)
74 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 2.0 1985-04-18
14:58:41
44.39 8.27 6 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 4899
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-18 14:58:41 ± 0.402
Latitude 44.39 ± 0.01
Longitude 8.27 ± 0.02
Depth (km) 6 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 4899

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) 2015.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 181
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) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00024
Epicentral distance of station farthest from the epicenter (degree) 0.00615
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

Field Value
Value 2
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 4899
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:09:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.STV.Z. 1985-04-18T14:59:05.70 10.0 undecidable manual SG 259 0.0062 -0.85 0
--.STV.Z. 1985-04-18T14:58:56.80 10.0 undecidable manual PG 259 0.0062 0.63 0.3
--.ROB.Z. 1985-04-18T14:58:53.60 10.0 undecidable manual SG 253 0.0026 0.07 0.8
--.FIN.Z. 1985-04-18T14:58:49.50 10.0 undecidable manual SG 193 0.0016 0.17 0.7
--.ROB.Z. 1985-04-18T14:58:48.50 10.0 undecidable manual PG 253 0.0026 -0.16 1.8
--.FIN.Z. 1985-04-18T14:58:46.10 10.0 undecidable manual PG 193 0.0016 -0.13 1.8
--.CK1.Z. 1985-04-18T14:58:44.50 10.0 undecidable manual SG 12 0.0002 -0.09 0.7
--.CK1.Z. 1985-04-18T14:58:43.50 10.0 undecidable manual PG 12 0.0002 0.01 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download