Earthquake 3 km SW Triora (IM), Magnitude M 2.2, 2 September 1986 time 03:45:46 (Timezone UTC)

A magnitude M 2.2 earthquake occured in region: 3 km SW Triora (IM), on

02-09-1986 03:45:46 (UTC)
02-09-1986 05:45:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.9740, 7.7450 at 9 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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Display location by

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).

Municipality	Region	Distance (km)	Inhabitants	Cumulative Inhabitants
Triora	IM	3	355	355
Molini di Triora	IM	3	617	972
Castel Vittorio	IM	8	287	1259
Pigna	IM	8	859	2118
Bajardo	IM	8	312	2430
Montalto Ligure	IM	10	377	2807
Carpasio	IM	10	168	2975
Badalucco	IM	10	1136	4111
Ceriana	IM	11	1250	5361
Rezzo	IM	12	366	5727
Montegrosso Pian Latte	IM	12	118	5845
Briga Alta	CN	12	39	5884
Apricale	IM	12	629	6513
Mendatica	IM	13	185	6698
Perinaldo	IM	13	870	7568
Isolabona	IM	13	679	8247
Cosio d'Arroscia	IM	13	221	8468
Aurigo	IM	14	347	8815
Rocchetta Nervina	IM	15	298	9113
Pornassio	IM	15	685	9798
Castellaro	IM	16	1256	11054
Pietrabruna	IM	16	501	11555
Pieve di Teco	IM	16	1338	12893
Borgomaro	IM	16	865	13758
Prelà	IM	16	503	14261
Taggia	IM	17	14116	28377
Seborga	IM	17	315	28692
Dolceacqua	IM	17	2074	30766
Sanremo	IM	17	54807	85573
Caravonica	IM	17	282	85855
Vasia	IM	17	389	86244
Lucinasco	IM	18	272	86516
Pompeiana	IM	18	823	87339
Soldano	IM	18	977	88316
Dolcedo	IM	18	1415	89731
Terzorio	IM	18	216	89947
Armo	IM	19	111	90058
Riva Ligure	IM	19	2910	92968
San Biagio della Cima	IM	19	1329	94297
Vallebona	IM	19	1310	95607
Cesio	IM	19	283	95890
Airole	IM	19	407	96297
Chiusavecchia	IM	19	577	96874
Vessalico	IM	19	282	97156
Ospedaletti	IM	19	3367	100523
Civezza	IM	20	609	101132
Santo Stefano al Mare	IM	20	2197	103329
Chiusanico	IM	20	607	103936
Camporosso	IM	20	5632	109568

Municipalities with at least 50000 inhabitants

An earthquake occurred to

17 Km N of Sanremo (54807 inhabitants)

49 Km SE of Cuneo (56081 inhabitants)

70 Km SW of Savona (61345 inhabitants)

Recent and historical seismicity

Not available maps for this sismic event.

Seismic hazard

Not available maps for this sismic event.

Shakemap

Not available maps for this sismic event.

Felt maps

Not available maps for this sismic event.

Locations history

Type	Magnitude	Date and Time (UTC)	Latitude	Longitude	Depth (km)	Published time (UTC)	Author	Location ID
Bulletin Rev1000	M 2.2	1986-09-02 03:45:46	43.974	7.745	9	2013-07-15 08:40:51	Bollettino Sismico Italiano INGV	33459

Preferred location and magnitude until now.

Origin information

Origin

Field	Value
Time (UTC)	1986-09-02 03:45:46 ± 0.153
Latitude	43.9740 ± 0.0131
Longitude	7.7450 ± 0.0136
Depth (km)	9 ± 1 (from location)
Evaluation mode of Origin	manual
Evaluation status of Origin	reviewed
Version	1000 -> BULLETIN-VAX
Event type	earthquake
Origin ID	33459

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)	1820.0
Confidence level of the uncertainty (%)	68

Quality

Field	Value
Largest azimuthal gap in station distribution as seen from epicenter (degree)	164
Number of associated phases, regardless of their use for origin computation	10
Number of defining phases	10
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)	0.00105
Epicentral distance of station farthest from the epicenter (degree)	0.01012
Number of stations at which the event was observed	5
Number of stations from which data was used for origin computation	5

Magnitude information

M:2.2

Field	Value
Value	2.2
Uncertainty
Num. used stations
Type of magnitude	M
Reference to an origin	33459
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)	Residual	Weight
--.LRG.Z.	1986-09-02T03:46:24.60	10.0	undecidable	manual	SN	243	1.1211	0.13	0.6
--.FRF.Z.	1986-09-02T03:46:16.80	10.0	undecidable	manual	SG	242	0.888	-0.93	0
--.LRG.Z.	1986-09-02T03:46:09.00	10.0	undecidable	manual	PN	243	1.1211	0.38	0.9
--.FRF.Z.	1986-09-02T03:46:04.60	10.0	undecidable	manual	PG	242	0.888	-0.12	1.7
--.STV.Z.	1986-09-02T03:46:02.20	10.0	undecidable	manual	SG	313	0.3996	0.09	0.9
--.SBF.Z.	1986-09-02T03:45:56.70	10.0	undecidable	manual	SG	243	0.2442	-0.32	0.6
--.STV.Z.	1986-09-02T03:45:55.40	10.0	undecidable	manual	PG	313	0.3996	-0.3	1.6
--.SBF.Z.	1986-09-02T03:45:53.30	10.0	undecidable	manual	PG	243	0.2442	0.54	0.8
--.IMP.Z.	1986-09-02T03:45:52.20	10.0	undecidable	manual	SG	117	0.1221	-0.36	0.6
--.IMP.Z.	1986-09-02T03:45:50.20	10.0	undecidable	manual	PG	117	0.1221	0.01	2.3

TDMT - Time Domain Moment Tensor

Not available TDMT solution for this seismic event.

Fault Plane solutions in the area

Not available maps for this sismic event.

Download

Type	Description	Link
QuakeML - small	Event, Origin, FocalMechanism	Download
QuakeML - full	Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude	Download

Earthquake with magnitude of M 2.2 on date 02-09-1986 and time 03:45:46 (UTC) in region 3 km SW Triora (IM)

Municipalities within 20 km from the epicenter

Municipalities with at least 50000 inhabitants

Origin

Uncertainty

Quality

M:2.2