Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 1.9 on date 17-06-1986 and time 09:51:34 (UTC) in region 1 km SE Cairo Montenotte (SV)

A magnitude Md 1.9 earthquake occured in region: 1 km SE Cairo Montenotte (SV), on

  • 17-06-1986 09:51:34 (UTC)
  • 17-06-1986 11:51:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.3940, 8.2850 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.

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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
Cairo Montenotte SV 1 13269 13269
Carcare SV 4 5587 18856
Cosseria SV 5 1105 19961
Plodio SV 5 650 20611
Cengio SV 6 3563 24174
Dego SV 7 1985 26159
Millesimo SV 7 3383 29542
Pallare SV 7 923 30465
Altare SV 8 2108 32573
Roccavignale SV 8 752 33325
Saliceto CN 10 1323 34648
Piana Crixia SV 10 788 35436
Giusvalla SV 11 441 35877
Mallare SV 11 1146 37023
Montezemolo CN 11 259 37282
Camerana CN 12 631 37913
Gottasecca CN 12 148 38061
Castelnuovo di Ceva CN 13 110 38171
Murialdo SV 13 841 39012
Pontinvrea SV 13 847 39859
Bormida SV 13 387 40246
Castelletto Uzzone CN 14 331 40577
Merana AL 14 189 40766
Osiglia SV 14 444 41210
Mioglia SV 15 526 41736
Quiliano SV 15 7232 48968
Priero CN 15 529 49497
Prunetto CN 15 451 49948
Monesiglio CN 16 645 50593
Pareto AL 16 554 51147
Sale delle Langhe CN 16 486 51633
Sale San Giovanni CN 16 183 51816
Stella SV 17 3009 54825
Spigno Monferrato AL 17 1050 55875
Perlo CN 17 116 55991
Paroldo CN 17 211 56202
Gorzegno CN 18 304 56506
Mombarcaro CN 18 268 56774
Pezzolo Valle Uzzone CN 18 344 57118
Serole AT 18 123 57241
Savona SV 18 61345 118586
Vado Ligure SV 18 8336 126922
Albissola Marina SV 19 5487 132409
Nucetto CN 19 430 132839
Sassello SV 19 1777 134616
Albisola Superiore SV 19 10163 144779
Levice CN 19 231 145010
Bergolo CN 19 71 145081
Rialto SV 19 564 145645
Vezzi Portio SV 19 809 146454
Orco Feglino SV 20 890 147344
Ceva CN 20 5782 153126
Mombaldone AT 20 209 153335
Massimino SV 20 113 153448

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km NW of Savona (61345 inhabitants)
52 Km W of Genova (586655 inhabitants)
57 Km S of Asti (76202 inhabitants)
58 Km E of Cuneo (56081 inhabitants)
64 Km SW of Alessandria (93943 inhabitants)
75 Km NE of Sanremo (54807 inhabitants)
83 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
Bulletin
Rev1000 		Md 1.9
M 1.9 		1986-06-17
09:51:34		 44.394 8.285 8 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 29499
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-06-17 09:51:34 ± 0.175
Latitude 44.3940 ± 0.0031
Longitude 8.2850 ± 0.0184
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 29499

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) 1503.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 205
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) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00016
Epicentral distance of station farthest from the epicenter (degree) 0.00761
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 29499
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:30:50

M:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 29499
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
--.SOO.Z. 1986-06-17T09:52:04.50 10.0 undecidable manual SG 277 0.8436 0.07 0.3
--.SOO.Z. 1986-06-17T09:51:52.00 10.0 undecidable manual PG 277 0.8436 0.07 0.8
--.ROB.Z. 1986-06-17T09:51:46.70 10.0 undecidable manual SG 252 0.3108 -0.28 0
--.FIN.Z. 1986-06-17T09:51:42.80 10.0 undecidable manual SG 196 0.1887 -0.02 0.7
--.ROB.Z. 1986-06-17T09:51:41.90 10.0 undecidable manual PG 252 0.3108 0.04 1.7
--.FIN.Z. 1986-06-17T09:51:39.50 10.0 undecidable manual PG 196 0.1887 0.05 1.6
--.CKI.Z. 1986-06-17T09:51:38.00 10.0 undecidable manual SG 350 0.0222 0.11 0.6
--.CKI.Z. 1986-06-17T09:51:36.50 10.0 positive manual PG 350 0.0222 -0.1 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