Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of M 2.0 on date 17-10-1985 and time 10:58:21 (Italy) in region 2 km SE Castelvecchio di Rocca Barbena (SV)

A magnitude M 2.0 earthquake occured in region: 2 km SE Castelvecchio di Rocca Barbena (SV), on

  • 17-10-1985 09:58:21 (UTC)
  • 17-10-1985 10:58:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.1220, 8.1330 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 2 309 309
Castelvecchio di Rocca Barbena SV 2 145 454
Erli SV 3 245 699
Balestrino SV 3 595 1294
Cisano sul Neva SV 4 2085 3379
Castelbianco SV 5 330 3709
Arnasco SV 5 645 4354
Toirano SV 6 2644 6998
Vendone SV 7 388 7386
Boissano SV 7 2492 9878
Bardineto SV 8 756 10634
Ortovero SV 8 1586 12220
Nasino SV 8 207 12427
Villanova d'Albenga SV 8 2657 15084
Ceriale SV 9 5561 20645
Onzo SV 9 219 20864
Borghetto Santo Spirito SV 9 4948 25812
Garlenda SV 10 1254 27066
Loano SV 10 11407 38473
Alto CN 10 128 38601
Albenga SV 10 24213 62814
Giustenice SV 11 977 63791
Aquila d'Arroscia IM 11 166 63957
Ranzo IM 12 557 64514
Garessio CN 12 3244 67758
Casanova Lerrone SV 12 749 68507
Magliolo SV 12 974 69481
Pietra Ligure SV 12 8992 78473
Tovo San Giacomo SV 13 2582 81055
Calizzano SV 13 1475 82530
Alassio SV 13 10934 93464
Borghetto d'Arroscia IM 14 456 93920
Caprauna CN 14 104 94024
Borgio Verezzi SV 14 2205 96229
Stellanello SV 15 808 97037
Testico SV 15 196 97233
Rialto SV 16 564 97797
Vessalico IM 16 282 98079
Calice Ligure SV 16 1730 99809
Priola CN 16 701 100510
Laigueglia SV 16 1810 102320
Villa Faraldi IM 17 444 102764
Finale Ligure SV 18 11711 114475
Armo IM 18 111 114586
Cesio IM 18 283 114869
Ormea CN 18 1617 116486
Andora SV 18 7552 124038
Osiglia SV 19 444 124482
Orco Feglino SV 19 890 125372
Pieve di Teco IM 19 1338 126710
Bormida SV 19 387 127097
Chiusanico IM 20 607 127704
Caravonica IM 20 282 127986

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SW of Savona (61345 inhabitants)
43 Km NE of Sanremo (54807 inhabitants)
55 Km SE of Cuneo (56081 inhabitants)
72 Km W of Genova (586655 inhabitants)
87 Km S of Asti (76202 inhabitants)
96 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 1985-10-17
09:58:21		 44.122 8.133 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 14769
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-10-17 09:58:21 ± 0.092
Latitude 44.1220 ± 0.0068
Longitude 8.1330 ± 0.0114
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 14769

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) 1187.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 187
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) 0.00089
Epicentral distance of station farthest from the epicenter (degree) 0.00235
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 14769
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
--.IMP.Z. 1985-10-17T09:58:32.20 10.0 undecidable manual SG 220 0.2553 0.2 0.4
--.ROB.Z. 1985-10-17T09:58:31.40 10.0 undecidable manual SG 314 0.2553 -0.31 0.2
--.IMP.Z. 1985-10-17T09:58:27.40 10.0 undecidable manual PG 220 0.2553 -0.16 1.3
--.ROB.Z. 1985-10-17T09:58:27.60 10.0 undecidable manual PG 314 0.2553 0.21 1
--.FIN.Z. 1985-10-17T09:58:26.70 10.0 undecidable manual SG 32 0.0999 -0.02 0.9
--.FIN.Z. 1985-10-17T09:58:24.50 10.0 undecidable manual PG 32 0.0999 -0.01 2.3
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