Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.3 on date 01-02-1990 and time 22:25:07 (UTC) in region Costa Ligure centro occidentale (Savona)

A magnitude Md 2.3 earthquake occured in region: Costa Ligure centro occidentale (Savona), on

  • 01-02-1990 22:25:07 (UTC)
  • 01-02-1990 23:25:07 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0850, 8.5340 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
Noli SV 16 2736 2736
Finale Ligure SV 18 11711 14447
Spotorno SV 18 3803 18250
Bergeggi SV 20 1129 19379

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km S of Savona (61345 inhabitants)
48 Km SW of Genova (586655 inhabitants)
67 Km E of Sanremo (54807 inhabitants)
85 Km E of Cuneo (56081 inhabitants)
92 Km S of Alessandria (93943 inhabitants)
94 Km S of Asti (76202 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 2.3
M 2.8 		1990-02-01
22:25:07		 44.085 8.534 10 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 109219
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-02-01 22:25:07 ± 0.309
Latitude 44.0850 ± 0.0165
Longitude 8.5340 ± 0.0184
Depth (km) 10 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 109219

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) 2353.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 159
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
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) 0.00235
Epicentral distance of station farthest from the epicenter (degree) 0.01514
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 109219
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:41:36

M:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 109219
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
--.BDI.Z. 1990-02-01T22:25:53.00 10.0 undecidable manual SN 89 1.4763 -0.55 0.3
--.PZZ.Z. 1990-02-01T22:25:43.80 10.0 undecidable manual SN 292 1.11 -0.88 0.1
--.DOI.Z. 1990-02-01T22:25:41.56 10.0 undecidable manual SG 294 1.0101 -0.72 0.2
--.LSD.Z. 1990-02-01T22:25:39.43 10.0 undecidable manual PN! 324 1.6761 2.38 0
--.BOB.Z. 1990-02-01T22:25:38.40 10.0 undecidable manual SG 43 0.9324 -1.68 0
--.STV.Z. 1990-02-01T22:25:37.59 10.0 undecidable manual SG 281 0.8769 -0.43 0.3
--.RRL.Z. 1990-02-01T22:25:36.27 10.0 undecidable manual PN 304 1.4874 1.73 0
--.ENR.Z. 1990-02-01T22:25:35.48 10.0 undecidable manual SG 280 0.8103 -0.37 0.4
--.BDI.Z. 1990-02-01T22:25:34.50 10.0 undecidable manual PN 89 1.4763 0.23 0.9
--.RSP.Z. 1990-02-01T22:25:33.71 10.0 undecidable manual PN 319 1.3875 0.55 0.6
--.PZZ.Z. 1990-02-01T22:25:29.30 10.0 undecidable manual PN 292 1.11 -0.11 1.2
--.DOI.Z. 1990-02-01T22:25:27.87 10.0 negative manual PG 294 1.0101 0.11 2.5
--.ROB.Z. 1990-02-01T22:25:26.10 10.0 undecidable manual SG 294 0.5106 -0.45 0.5
--.BOB.Z. 1990-02-01T22:25:26.58 10.0 undecidable manual PG 43 0.9324 0.09 1.2
--.IMI.Z. 1990-02-01T22:25:25.19 10.0 undecidable manual SG 249 0.4884 -0.45 0.4
--.STV.Z. 1990-02-01T22:25:25.54 10.0 undecidable manual PG 281 0.8769 0.24 1.3
--.PCP.Z. 1990-02-01T22:25:24.18 10.0 undecidable manual SG 0 0.444 -0.27 0.8
--.ENR.Z. 1990-02-01T22:25:23.94 10.0 undecidable manual PG 280 0.8103 -0.1 1.3
--.CKI.Z. 1990-02-01T22:25:21.50 10.0 undecidable manual SG 331 0.3774 -0.56 0.3
--.FIN.Z. 1990-02-01T22:25:18.84 10.0 undecidable manual SG 297 0.2553 0.56 0.5
--.ROB.Z. 1990-02-01T22:25:18.67 10.0 negative manual PG 294 0.5106 0 2.7
--.PCP.Z. 1990-02-01T22:25:17.16 10.0 negative manual PG 0 0.444 -0.3 2.4
--.IMI.Z. 1990-02-01T22:25:17.92 10.0 negative manual PG 249 0.4884 -0.23 2.3
--.CKI.Z. 1990-02-01T22:25:16.31 10.0 positive manual PG 331 0.3774 0.23 2.5
--.FIN.Z. 1990-02-01T22:25:14.24 10.0 negative manual PG 297 0.2553 0.34 2.3
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