Earthquake with magnitude of Md 4.1 on date 26-12-1989 and time 19:59:57 (UTC) in region Costa Ligure Occidentale (Imperia)

A magnitude Md 4.1 earthquake occured in region: Costa Ligure Occidentale (Imperia), on

  • 26-12-1989 19:59:57 (UTC)
  • 26-12-1989 20:59:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.53, 7.55 at 5 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SW of Sanremo (54807 inhabitants)
97 Km S of Cuneo (56081 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 4.1
M 4.6
1989-12-26
19:59:57
43.53 7.55 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 106699
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-12-26 19:59:57 ± 0.142
Latitude 43.53 ± 0.01
Longitude 7.55 ± 0.01
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 106699

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) 1599
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 78
Number of defining phases 78
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00308
Epicentral distance of station farthest from the epicenter (degree) 0.06872
Number of stations at which the event was observed 66
Number of stations from which data was used for origin computation 66
Magnitudes information

Md:4.1

Field Value
Value 4.1
Uncertainty
Num. used stations 9
Type of magnitude Md
Reference to an origin 106699
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:39:21

M:4.6

Field Value
Value 4.6
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 106699
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
--.LJU.E. 1989-12-26T20:02:23.00 10.0 undecidable manual SN 60 0.0499 1.44 0.1
--.LOR.Z. 1989-12-26T20:01:59.00 10.0 undecidable manual SN 326 0.041 1.17 0.1
--.BSF.Z. 1989-12-26T20:01:53.70 10.0 undecidable manual SN 353 0.039 0.97 0.2
--.FLN.Z. 1989-12-26T20:01:50.40 10.0 undecidable manual PN 316 0.0687 0.95 0.3
--.GRR.Z. 1989-12-26T20:01:49.00 10.0 undecidable manual PN 312 0.0683 0.08 0.8
--.MFF.Z. 1989-12-26T20:01:31.00 10.0 undecidable manual PN 302 0.0562 0.68 0.6
--.SFI.Z. 1989-12-26T20:01:23.54 10.0 undecidable manual SN 81 0.0281 -0.38 0.5
--.LJU.Z. 1989-12-26T20:01:22.00 10.0 undecidable manual PN 60 0.0499 1.2 0.3
--.DUI.Z. 1989-12-26T20:01:18.00 10.0 undecidable manual PN 107 0.0486 -0.9 0.5
--.EPF.Z. 1989-12-26T20:01:16.60 10.0 undecidable manual PN 266 0.0474 -0.38 0.9
--.VOY.Z. 1989-12-26T20:01:15.10 10.0 undecidable manual PN 58 0.0463 -0.18 1
--.LFF.Z. 1989-12-26T20:01:15.00 10.0 undecidable manual PN 288 0.0457 0.63 0.7
--.LSF.Z. 1989-12-26T20:01:14.80 10.0 undecidable manual PN 304 0.0455 0.72 0.7
--.SDI.Z. 1989-12-26T20:01:14.00 10.0 undecidable manual PN 109 0.0444 1.48 0.1
--.FVI.Z. 1989-12-26T20:01:11.82 10.0 undecidable manual PN 48 0.0431 1.34 0.2
--.CDF.Z. 1989-12-26T20:01:11.40 10.0 undecidable manual PN 357 0.044 -0.32 1
--.VAI.Z. 1989-12-26T20:01:08.50 10.0 undecidable manual SN 19 0.0224 -0.44 0.5
--.TCF.Z. 1989-12-26T20:01:08.70 10.0 undecidable manual PN 307 0.0421 -0.2 1.1
--.AZI.Z. 1989-12-26T20:01:08.00 10.0 undecidable manual PN 107 0.0412 0.48 0.9
--.RJF.Z. 1989-12-26T20:01:08.60 10.0 undecidable manual PN 294 0.0419 -0.01 1.1
--.LPO.Z. 1989-12-26T20:01:08.80 10.0 undecidable manual PN 286 0.0423 -0.52 0.9
--.HAU.Z. 1989-12-26T20:01:08.10 10.0 undecidable manual PN 349 0.041 0.95 0.5
--.LOR.Z. 1989-12-26T20:01:06.70 10.0 undecidable manual PN 326 0.041 -0.39 1
--.SSF.Z. 1989-12-26T20:01:06.70 10.0 undecidable manual PN 322 0.0408 -0.2 1.1
--.BGF.Z. 1989-12-26T20:01:06.30 10.0 undecidable manual PN 313 0.0405 -0.07 1.2
--.AVF.Z. 1989-12-26T20:01:05.30 10.0 undecidable manual PN 319 0.0396 0.2 1.1
--.MAF.Z. 1989-12-26T20:01:05.30 10.0 undecidable manual PN 309 0.0399 -0.3 1.1
--.BSF.Z. 1989-12-26T20:01:04.30 10.0 undecidable manual PN 353 0.039 0.14 1.2
--.LBF.Z. 1989-12-26T20:01:03.80 10.0 undecidable manual PN 325 0.0384 0.48 1
--.CP9.Z. 1989-12-26T20:01:02.25 10.0 undecidable manual PN 110 0.0387 -1.41 0.2
--.RDP.Z. 1989-12-26T20:01:02.00 10.0 undecidable manual PN 113 0.0376 -0.09 1.2
--.CAF.Z. 1989-12-26T20:01:01.40 10.0 undecidable manual PN 291 0.0375 -0.5 1
--.RMP.Z. 1989-12-26T20:01:01.50 10.0 undecidable manual PN 112 0.0373 -0.14 1.2
--.SMF.Z. 1989-12-26T20:01:00.70 10.0 undecidable manual PN 321 0.0366 0.18 1.2
--.LPG.Z. 1989-12-26T20:00:59.50 10.0 undecidable manual SN 344 0.0185 1.08 0.2
--.ARV.Z. 1989-12-26T20:00:59.61 10.0 undecidable manual PN 88 0.0351 1.36 0.2
--.MNS.Z. 1989-12-26T20:00:58.59 10.0 undecidable manual PN 105 0.0352 0.16 1.2
--.PII.Z. 1989-12-26T20:00:58.79 10.0 undecidable manual SN! 83 0.0193 -2.15 0
--.ORO.Z. 1989-12-26T20:00:58.96 10.0 undecidable manual SN 8 0.019 -1.13 0.2
--.CTI.Z. 1989-12-26T20:00:57.62 10.0 negative manual PN 47 0.0346 0.19 2.5
--.ASS.Z. 1989-12-26T20:00:55.58 10.0 undecidable manual PN 95 0.0336 -0.35 1.1
--.CRE.Z. 1989-12-26T20:00:49.50 10.0 undecidable manual PN 86 0.0287 1.15 0.4
--.SFI.Z. 1989-12-26T20:00:46.67 10.0 undecidable manual PN 81 0.0281 -0.85 0.7
--.PGD.Z. 1989-12-26T20:00:46.78 10.0 undecidable manual PN 81 0.0273 0.54 1.1
--.SAL.Z. 1989-12-26T20:00:46.13 10.0 undecidable manual PN 44 0.0266 0.77 0.8
--.RRL.Z. 1989-12-26T20:00:44.35 10.0 undecidable manual SN 338 0.0134 -0.91 0.4
--.MAO.Z. 1989-12-26T20:00:43.59 10.0 undecidable manual PN 111 0.0257 -0.24 1.3
--.MDI.Z. 1989-12-26T20:00:41.92 10.0 undecidable manual PN? 33 0.0244 -0.09 0.6
--.VAI.Z. 1989-12-26T20:00:38.89 10.0 positive manual PN 19 0.0224 0.02 2.8
--.MME.Z. 1989-12-26T20:00:36.96 10.0 positive manual PN 72 0.0212 -0.11 2.8
--.BDI.Z. 1989-12-26T20:00:34.97 10.0 undecidable manual PN 75 0.0203 -0.68 0.9
--.LPG.Z. 1989-12-26T20:00:34.40 10.0 undecidable manual PN 344 0.0185 1.6 0.1
--.LPL.Z. 1989-12-26T20:00:34.60 10.0 undecidable manual PN 343 0.0186 1.51 0.2
--.PII.Z. 1989-12-26T20:00:33.81 10.0 undecidable manual PN 83 0.0193 -0.44 1.2
--.ORO.Z. 1989-12-26T20:00:33.50 10.0 positive manual PN 8 0.019 -0.72 1.7
--.ORX.Z. 1989-12-26T20:00:33.80 10.0 undecidable manual PN 7 0.0191 -0.75 0.8
--.DOI.Z. 1989-12-26T20:00:31.89 10.0 undecidable manual SG 347 0.009 -0.93 0.2
--.LSD.Z. 1989-12-26T20:00:31.50 10.0 undecidable manual PN 351 0.0175 0.09 1.4
--.BOB.Z. 1989-12-26T20:00:30.00 10.0 undecidable manual PN 46 0.0165 0.12 1.4
--.BNI.Z. 1989-12-26T20:00:28.47 10.0 positive manual PN 337 0.0148 1.21 0.7
--.LRG.Z. 1989-12-26T20:00:26.30 10.0 undecidable manual SG! 265 0.0078 -2.23 0
--.RSP.Z. 1989-12-26T20:00:26.12 10.0 positive manual PN 352 0.0147 -1.01 1.1
--.RRL.Z. 1989-12-26T20:00:25.91 10.0 positive manual PN 338 0.0134 0.7 1.8
--.GEN.Z. 1989-12-26T20:00:21.70 10.0 undecidable manual PN 47 0.012 -1.29 0.3
--.PCP.Z. 1989-12-26T20:00:20.50 10.0 positive manual PN 34 0.0111 -1.15 0.8
--.PZZ.Z. 1989-12-26T20:00:18.40 10.0 negative manual PG 341 0.0092 -0.52 2.2
--.DOI.Z. 1989-12-26T20:00:17.49 10.0 undecidable manual PG 347 0.009 -0.52 1.1
--.CKI.Z. 1989-12-26T20:00:17.78 10.0 positive manual PG 29 0.0093 -0.84 1.4
--.LRG.Z. 1989-12-26T20:00:15.00 10.0 undecidable manual PG 265 0.0078 -0.53 1.1
--.ROB.Z. 1989-12-26T20:00:14.58 10.0 positive manual PG 16 0.0072 0.13 2.8
--.FIN.Z. 1989-12-26T20:00:14.87 10.0 positive manual PG 34 0.0074 0.05 2.8
--.LMR.Z. 1989-12-26T20:00:13.20 10.0 undecidable manual PG 256 0.007 -0.73 0.8
--.ENR.Z. 1989-12-26T20:00:12.46 10.0 negative manual PG 352 0.0063 -0.09 2.8
--.STV.Z. 1989-12-26T20:00:12.85 10.0 negative manual PG 347 0.0066 -0.36 2.5
--.SBF.Z. 1989-12-26T20:00:11.20 10.0 undecidable manual SG 345 0.0031 -0.09 0.6
--.FRF.Z. 1989-12-26T20:00:11.00 10.0 undecidable manual PG 273 0.0059 -0.64 1
--.IMI.Z. 1989-12-26T20:00:08.37 10.0 undecidable manual PG 32 0.004 0.47 1.1
--.SBF.Z. 1989-12-26T20:00:05.60 10.0 undecidable manual PG 345 0.0031 0.02 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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