ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Md 2.1 on date 04-02-1985 and time 15:34:18 (Italy) in region 3 km E Murialdo (SV)

A magnitude Md 2.1 earthquake occured in region: 3 km E Murialdo (SV), on

  • 04-02-1985 14:34:18 (UTC)
  • 04-02-1985 15:34:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.32, 8.2 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
Murialdo SV 3 841 841
Roccavignale SV 4 752 1593
Millesimo SV 5 3383 4976
Osiglia SV 5 444 5420
Plodio SV 5 650 6070
Cosseria SV 6 1105 7175
Bormida SV 6 387 7562
Pallare SV 6 923 8485
Castelnuovo di Ceva CN 6 110 8595
Cengio SV 7 3563 12158
Montezemolo CN 8 259 12417
Carcare SV 8 5587 18004
Mallare SV 9 1146 19150
Perlo CN 9 116 19266
Priero CN 10 529 19795
Saliceto CN 10 1323 21118
Cairo Montenotte SV 10 13269 34387
Massimino SV 11 113 34500
Nucetto CN 11 430 34930
Altare SV 12 2108 37038
Calizzano SV 12 1475 38513
Camerana CN 12 631 39144
Sale delle Langhe CN 12 486 39630
Bagnasco CN 13 1035 40665
Sale San Giovanni CN 13 183 40848
Rialto SV 13 564 41412
Ceva CN 15 5782 47194
Battifollo CN 15 219 47413
Magliolo SV 15 974 48387
Calice Ligure SV 15 1730 50117
Orco Feglino SV 15 890 51007
Gottasecca CN 16 148 51155
Paroldo CN 16 211 51366
Bardineto SV 16 756 52122
Priola CN 16 701 52823
Dego SV 17 1985 54808
Vezzi Portio SV 17 809 55617
Scagnello CN 17 194 55811
Monesiglio CN 17 645 56456
Quiliano SV 17 7232 63688
Tovo San Giacomo SV 17 2582 66270
Giustenice SV 17 977 67247
Roascio CN 17 97 67344
Lisio CN 18 201 67545
Torresina CN 18 52 67597
Mombarcaro CN 18 268 67865
Mombasiglio CN 19 609 68474
Viola CN 19 391 68865
Castelletto Uzzone CN 19 331 69196
Prunetto CN 19 451 69647
Garessio CN 19 3244 72891
Igliano CN 20 74 72965
Piana Crixia SV 20 788 73753
Vado Ligure SV 20 8336 82089

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km W of Savona (61345 inhabitants)
52 Km E of Cuneo (56081 inhabitants)
59 Km W of Genova (586655 inhabitants)
64 Km S of Asti (76202 inhabitants)
65 Km NE of Sanremo (54807 inhabitants)
73 Km SW of Alessandria (93943 inhabitants)
86 Km SE of Moncalieri (57294 inhabitants)
93 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 1985-02-04
14:34:18
44.33 8.2 6 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 1079
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-04 14:34:18 ± 0.084
Latitude 44.33 ± 0.00
Longitude 8.20 ± 0.01
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1079

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) 981.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 145
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
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) 0.00097
Epicentral distance of station farthest from the epicenter (degree) 0.00413
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 1079
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:06:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.IMP.Z. 1985-02-04T14:34:28.60 10.0 undecidable manual PG 208 0.0041 -0.02 1.1
--.ROB.E. 1985-02-04T14:34:27.50 10.0 undecidable manual SG 264 0.0021 -0.3 0.1
--.ROB.Z. 1985-02-04T14:34:24.10 10.0 undecidable manual PG 264 0.0021 0.22 0.5
--.FIN.Z. 1985-02-04T14:34:23.60 10.0 undecidable manual SG 176 0.001 0.07 0.6
--.CK1.Z. 1985-02-04T14:34:23.50 10.0 undecidable manual SG 31 0.001 0.17 0.4
--.CK1.Z. 1985-02-04T14:34:21.20 10.0 positive manual PG 31 0.001 -0.1 2.9
--.FIN.Z. 1985-02-04T14:34:21.30 10.0 undecidable manual PG 176 0.001 -0.11 1.4
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