Earthquake with magnitude of Md 2.0 on date 26-02-1991 and time 14:54:50 (Italy) in region Costa Ligure Occidentale (Imperia)

A magnitude Md 2.0 earthquake occured in region: Costa Ligure Occidentale (Imperia), on

  • 26-02-1991 13:54:50 (UTC)
  • 26-02-1991 14:54:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.02, 7.65 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Triora IM 10 355 355
Pigna IM 10 859 1214
Castel Vittorio IM 11 287 1501
Briga Alta CN 11 39 1540
Molini di Triora IM 11 617 2157
Mendatica IM 14 185 2342
Bajardo IM 14 312 2654
Montegrosso Pian Latte IM 15 118 2772
Rocchetta Nervina IM 15 298 3070
Apricale IM 16 629 3699
Isolabona IM 16 679 4378
Cosio d'Arroscia IM 16 221 4599
Perinaldo IM 18 870 5469
Rezzo IM 18 366 5835
Airole IM 18 407 6242
Ceriana IM 19 1250 7492
Pornassio IM 19 685 8177
Carpasio IM 19 168 8345
Olivetta San Michele IM 19 211 8556
Montalto Ligure IM 19 377 8933
Dolceacqua IM 19 2074 11007
Badalucco IM 20 1136 12143

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km NW of Sanremo (54807 inhabitants)
42 Km S of Cuneo (56081 inhabitants)
74 Km W 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
Rev 1000 Md 2.0
M 2.2
1991-02-26
13:54:50
44.02 7.65 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 136759
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-02-26 13:54:50 ± 0.097
Latitude 44.02 ± 0.01
Longitude 7.65 ± 0.01
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 136759

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) 1027.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00186
Epicentral distance of station farthest from the epicenter (degree) 0.00737
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 136759
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:07:30

M:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 136759
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 Takeoff_angle Residual Weight
--.CKI.Z. 1991-02-26T13:55:11.50 10.0 undecidable manual SG 48 0.0053 -0.55 0.1
--.DOI.Z. 1991-02-26T13:55:10.50 10.0 undecidable manual SG 329 0.005 -0.23 0.4
--.PCP.Z. 1991-02-26T13:55:07.28 10.0 undecidable manual PG 50 0.0074 0.05 1.2
--.DOI.Z. 1991-02-26T13:55:03.00 10.0 undecidable manual PG 329 0.005 0.67 0.2
--.CKI.Z. 1991-02-26T13:55:03.50 10.0 undecidable manual PG 48 0.0053 0.41 0.6
--.PZZ.Z. 1991-02-26T13:55:03.63 10.0 undecidable manual PG 321 0.0055 0.18 1.3
--.SBF.Z. 1991-02-26T13:55:00.15 10.0 undecidable manual SG 223 0.0019 0.29 0.5
--.FIN.Z. 1991-02-26T13:55:00.50 10.0 undecidable manual PG 65 0.004 -0.11 1.6
--.ROB.Z. 1991-02-26T13:54:57.89 10.0 undecidable manual PG 30 0.0028 -0.03 1.7
--.STV.Z. 1991-02-26T13:54:57.80 10.0 undecidable manual PG 315 0.0028 -0.13 1.4
--.ENR.Z. 1991-02-26T13:54:56.52 10.0 undecidable manual PG 321 0.0023 -0.27 1
--.SBF.Z. 1991-02-26T13:54:55.84 10.0 undecidable manual PG 223 0.0019 -0.21 1.3
--.IMI.Z. 1991-02-26T13:54:55.84 10.0 undecidable manual PG 122 0.0019 0.01 1.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download