Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.0 on date 26-06-1985 and time 21:51:50 (UTC) in region 2 km W Montalto Ligure (IM)

A magnitude Md 2.0 earthquake occured in region: 2 km W Montalto Ligure (IM), on

  • 26-06-1985 21:51:50 (UTC)
  • 26-06-1985 23:51:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.9380, 7.8190 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
Montalto Ligure IM 2 377 377
Badalucco IM 3 1136 1513
Carpasio IM 5 168 1681
Molini di Triora IM 7 617 2298
Ceriana IM 7 1250 3548
Triora IM 8 355 3903
Pietrabruna IM 9 501 4404
Bajardo IM 9 312 4716
Castellaro IM 9 1256 5972
Prelà IM 10 503 6475
Aurigo IM 10 347 6822
Rezzo IM 10 366 7188
Taggia IM 11 14116 21304
Vasia IM 11 389 21693
Pompeiana IM 11 823 22516
Borgomaro IM 11 865 23381
Dolcedo IM 11 1415 24796
Terzorio IM 11 216 25012
Castel Vittorio IM 12 287 25299
Lucinasco IM 12 272 25571
Riva Ligure IM 12 2910 28481
Pigna IM 12 859 29340
Civezza IM 13 609 29949
Caravonica IM 13 282 30231
Santo Stefano al Mare IM 13 2197 32428
Cipressa IM 13 1290 33718
Sanremo IM 13 54807 88525
Costarainera IM 14 828 89353
Chiusavecchia IM 14 577 89930
Perinaldo IM 14 870 90800
Apricale IM 14 629 91429
Montegrosso Pian Latte IM 14 118 91547
Chiusanico IM 15 607 92154
Pieve di Teco IM 15 1338 93492
Cesio IM 15 283 93775
San Lorenzo al Mare IM 15 1297 95072
Pornassio IM 15 685 95757
Mendatica IM 16 185 95942
Cosio d'Arroscia IM 16 221 96163
Pontedassio IM 16 2323 98486
Isolabona IM 16 679 99165
Seborga IM 16 315 99480
Vessalico IM 17 282 99762
Briga Alta CN 17 39 99801
Ospedaletti IM 17 3367 103168
Imperia IM 18 42034 145202
Diano Arentino IM 18 722 145924
Soldano IM 18 977 146901
Rocchetta Nervina IM 18 298 147199
Vallebona IM 18 1310 148509
Armo IM 18 111 148620
Dolceacqua IM 19 2074 150694
Testico SV 19 196 150890
Borghetto d'Arroscia IM 19 456 151346
San Biagio della Cima IM 19 1329 152675

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km N of Sanremo (54807 inhabitants)
55 Km SE of Cuneo (56081 inhabitants)
67 Km SW of Savona (61345 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 		Md 2.0 1985-06-26
21:51:50		 43.938 7.819 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 9199
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-06-26 21:51:50 ± 0.282
Latitude 43.9380 ± 0.0172
Longitude 7.8190 ± 0.0257
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 9199

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) 2809.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 200
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00049
Epicentral distance of station farthest from the epicenter (degree) 0.00518
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:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 9199
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:13:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.CK1.Z. 1985-06-26T21:52:10.00 10.0 undecidable manual SG 34 0.5772 -0.96 0.1
--.STV.Z. 1985-06-26T21:52:06.50 10.0 undecidable manual SG 311 0.4662 -0.83 0.2
--.ROB.Z. 1985-06-26T21:52:04.00 10.0 undecidable manual SG 6 0.3552 0.02 0.9
--.CK1.Z. 1985-06-26T21:52:02.50 10.0 undecidable manual PG 34 0.5772 0.27 1.4
--.STV.Z. 1985-06-26T21:52:00.20 10.0 undecidable manual PG 311 0.4662 0.06 1.9
--.ROB.Z. 1985-06-26T21:51:58.80 10.0 undecidable manual PG 6 0.3552 0.59 0.9
--.IMP.Z. 1985-06-26T21:51:53.90 10.0 undecidable manual SG 111 0.0555 -0.53 0.4
--.IMP.Z. 1985-06-26T21:51:52.70 10.0 undecidable manual PG 111 0.0555 0.02 2.2
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