INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of Md 2.0 on date 18-04-1985 and time 17:51:53 (UTC) in region 1 km W Roccavignale (SV)

A magnitude Md 2.0 earthquake occured in region: 1 km W Roccavignale (SV), on

  • 18-04-1985 17:51:53 (UTC)
  • 18-04-1985 19:51:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.36, 8.18 at 8 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
Roccavignale SV 1 752 752
Millesimo SV 2 3383 4135
Montezemolo CN 4 259 4394
Castelnuovo di Ceva CN 4 110 4504
Cengio SV 4 3563 8067
Cosseria SV 5 1105 9172
Murialdo SV 5 841 10013
Plodio SV 5 650 10663
Saliceto CN 6 1323 11986
Priero CN 7 529 12515
Camerana CN 8 631 13146
Perlo CN 8 116 13262
Pallare SV 8 923 14185
Osiglia SV 9 444 14629
Carcare SV 9 5587 20216
Cairo Montenotte SV 9 13269 33485
Sale delle Langhe CN 9 486 33971
Sale San Giovanni CN 9 183 34154
Bormida SV 10 387 34541
Nucetto CN 10 430 34971
Massimino SV 11 113 35084
Gottasecca CN 12 148 35232
Mallare SV 12 1146 36378
Ceva CN 12 5782 42160
Paroldo CN 12 211 42371
Bagnasco CN 13 1035 43406
Monesiglio CN 13 645 44051
Altare SV 13 2108 46159
Torresina CN 14 52 46211
Battifollo CN 14 219 46430
Roascio CN 14 97 46527
Mombarcaro CN 14 268 46795
Calizzano SV 15 1475 48270
Dego SV 15 1985 50255
Prunetto CN 15 451 50706
Castelletto Uzzone CN 15 331 51037
Scagnello CN 16 194 51231
Igliano CN 16 74 51305
Mombasiglio CN 17 609 51914
Lisio CN 17 201 52115
Rialto SV 17 564 52679
Piana Crixia SV 18 788 53467
Priola CN 18 701 54168
Castellino Tanaro CN 18 312 54480
Gorzegno CN 18 304 54784
San Benedetto Belbo CN 18 179 54963
Lesegno CN 18 794 55757
Murazzano CN 18 834 56591
Viola CN 19 391 56982
Bardineto SV 19 756 57738
Marsaglia CN 19 245 57983
Niella Belbo CN 19 372 58355
Calice Ligure SV 19 1730 60085
Monasterolo Casotto CN 19 89 60174
Orco Feglino SV 19 890 61064
Magliolo SV 19 974 62038
Quiliano SV 20 7232 69270
Giusvalla SV 20 441 69711

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km W of Savona (61345 inhabitants)
50 Km E of Cuneo (56081 inhabitants)
60 Km W of Genova (586655 inhabitants)
60 Km S of Asti (76202 inhabitants)
67 Km NE of Sanremo (54807 inhabitants)
71 Km SW of Alessandria (93943 inhabitants)
82 Km SE of Moncalieri (57294 inhabitants)
89 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
17:51:53
44.36 8.18 8 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 4929
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-18 17:51:53 ± 0.188
Latitude 44.36 ± 0.01
Longitude 8.18 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 4929

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) 1625.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 148
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
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) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.0055
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 4929
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:09:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.STV.Z. 1985-04-18T17:52:14.50 10.0 undecidable manual SG 260 0.0055 -0.84 0
--.IMP.Z. 1985-04-18T17:52:11.00 10.0 undecidable manual SG 205 0.0044 -0.12 0.5
--.STV.Z. 1985-04-18T17:52:06.40 10.0 undecidable manual PG 260 0.0055 0.42 0.5
--.IMP.Z. 1985-04-18T17:52:03.50 10.0 undecidable manual PG 205 0.0044 -0.04 2.9
--.ROB.Z. 1985-04-18T17:52:02.10 10.0 undecidable manual SG 255 0.002 -0.27 0.5
--.FIN.Z. 1985-04-18T17:51:59.50 10.0 undecidable manual SG 172 0.0013 -0.14 0.7
--.ROB.Z. 1985-04-18T17:51:58.70 10.0 undecidable manual PG 255 0.002 0.21 1.5
--.CK1.Z. 1985-04-18T17:51:57.00 10.0 undecidable manual SG 48 0.0008 -0.71 0.1
--.FIN.Z. 1985-04-18T17:51:57.00 10.0 undecidable manual PG 172 0.0013 0.09 1.8
--.CK1.Z. 1985-04-18T17:51:56.00 10.0 undecidable manual PG 48 0.0008 0.2 1.5
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