Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of M 2.0 on date 08-10-1985 and time 17:25:38 (Italy) in region 1 km SW Castelvecchio di Rocca Barbena (SV)

A magnitude M 2.0 earthquake occured in region: 1 km SW Castelvecchio di Rocca Barbena (SV), on

  • 08-10-1985 16:25:38 (UTC)
  • 08-10-1985 17:25:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.1220, 8.1070 at 10 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Zuccarello SV 1 309 309
Castelvecchio di Rocca Barbena SV 1 145 454
Erli SV 2 245 699
Castelbianco SV 3 330 1029
Arnasco SV 5 645 1674
Cisano sul Neva SV 5 2085 3759
Balestrino SV 6 595 4354
Vendone SV 6 388 4742
Nasino SV 6 207 4949
Onzo SV 7 219 5168
Ortovero SV 8 1586 6754
Bardineto SV 8 756 7510
Toirano SV 8 2644 10154
Alto CN 8 128 10282
Villanova d'Albenga SV 9 2657 12939
Aquila d'Arroscia IM 9 166 13105
Boissano SV 9 2492 15597
Garlenda SV 10 1254 16851
Ranzo IM 10 557 17408
Ceriale SV 10 5561 22969
Garessio CN 10 3244 26213
Borghetto Santo Spirito SV 11 4948 31161
Casanova Lerrone SV 11 749 31910
Albenga SV 12 24213 56123
Caprauna CN 12 104 56227
Borghetto d'Arroscia IM 12 456 56683
Loano SV 12 11407 68090
Giustenice SV 13 977 69067
Calizzano SV 13 1475 70542
Alassio SV 14 10934 81476
Magliolo SV 14 974 82450
Stellanello SV 14 808 83258
Testico SV 14 196 83454
Vessalico IM 14 282 83736
Tovo San Giacomo SV 14 2582 86318
Pietra Ligure SV 15 8992 95310
Priola CN 15 701 96011
Armo IM 16 111 96122
Ormea CN 16 1617 97739
Borgio Verezzi SV 16 2205 99944
Cesio IM 16 283 100227
Laigueglia SV 17 1810 102037
Villa Faraldi IM 17 444 102481
Pieve di Teco IM 17 1338 103819
Rialto SV 17 564 104383
Calice Ligure SV 18 1730 106113
Andora SV 18 7552 113665
Caravonica IM 19 282 113947
Chiusanico IM 19 607 114554
Osiglia SV 19 444 114998
Chiusavecchia IM 20 577 115575
Pornassio IM 20 685 116260
Finale Ligure SV 20 11711 127971
Diano Arentino IM 20 722 128693
Massimino SV 20 113 128806

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SW of Savona (61345 inhabitants)
42 Km NE of Sanremo (54807 inhabitants)
54 Km SE of Cuneo (56081 inhabitants)
73 Km W of Genova (586655 inhabitants)
87 Km S of Asti (76202 inhabitants)
97 Km SW of Alessandria (93943 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
Bulletin
Rev1000 		M 2.0 1985-10-08
16:25:38		 44.122 8.107 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 14359
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-10-08 16:25:38 ± 0.081
Latitude 44.1220 ± 0.0051
Longitude 8.1070 ± 0.0076
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 14359

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) 835.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 176
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
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) 0.00227
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

M:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 14359
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:48:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.ROB.Z. 1985-10-08T16:25:48.10 10.0 undecidable manual SG 317 0.2442 -0.15 0.4
--.IMP.Z. 1985-10-08T16:25:48.30 10.0 undecidable manual SG 216 0.2553 -0.28 0.1
--.IMP.Z. 1985-10-08T16:25:44.40 10.0 undecidable manual PG 216 0.2553 0.11 1.5
--.ROB.Z. 1985-10-08T16:25:44.20 10.0 undecidable manual PG 317 0.2442 0.09 1.6
--.FIN.Z. 1985-10-08T16:25:43.80 10.0 undecidable manual SG 40 0.111 -0.2 0.3
--.FIN.Z. 1985-10-08T16:25:41.70 10.0 undecidable manual PG 40 0.111 0.05 2.1
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download