Earthquake with magnitude of Md 2.1 on date 29-09-1990 and time 21:56:26 (Italy) in region Costa Ligure centro occidentale (Savona)

A magnitude Md 2.1 earthquake occured in region: Costa Ligure centro occidentale (Savona), on

  • 29-09-1990 19:56:26 (UTC)
  • 29-09-1990 21:56:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1340, 8.6240 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
Noli SV 18 2736 2736
Bergeggi SV 19 1129 3865
Spotorno SV 19 3803 7668

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SE of Savona (61345 inhabitants)
40 Km SW of Genova (586655 inhabitants)
76 Km E of Sanremo (54807 inhabitants)
87 Km S of Alessandria (93943 inhabitants)
90 Km E of Cuneo (56081 inhabitants)
91 Km SE of Asti (76202 inhabitants)
96 Km W of La Spezia (93959 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 2.1
M 2.3
1990-09-29
19:56:26
44.134 8.624 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 127949
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-09-29 19:56:26 ± 0.692
Latitude 44.1340 ± 0.0261
Longitude 8.6240 ± 0.0546
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 127949

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) 5235.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 255
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) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00275
Epicentral distance of station farthest from the epicenter (degree) 0.01376
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:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 127949
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:58:59

M:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 127949
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:42:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.FRF.Z. 1990-09-29T19:57:13.80 10.0 undecidable manual SN 248 1.5318 0.59 0.3
--.SBF.Z. 1990-09-29T19:56:57.60 10.0 undecidable manual SG 252 0.888 0.71 0.3
--.FRF.Z. 1990-09-29T19:56:54.40 10.0 undecidable manual PN 248 1.5318 1.05 0.2
--.PZZ.Z. 1990-09-29T19:56:47.92 10.0 undecidable manual PN 289 1.1433 -0.13 1.5
--.STV.Z. 1990-09-29T19:56:44.40 10.0 undecidable manual PG 277 0.9213 -0.23 1.6
--.SBF.Z. 1990-09-29T19:56:43.80 10.0 undecidable manual PG 252 0.888 -0.13 1.7
--.ENR.Z. 1990-09-29T19:56:43.60 10.0 undecidable manual PG 276 0.8658 0.21 1.6
--.CKI.Z. 1990-09-29T19:56:41.00 10.0 undecidable manual SG 318 0.3774 0.75 0.3
--.IMI.Z. 1990-09-29T19:56:37.32 10.0 undecidable manual PG 246 0.5661 -0.56 1.2
--.ROB.Z. 1990-09-29T19:56:36.82 10.0 undecidable manual PG 287 0.555 -0.94 0.5
--.CKI.Z. 1990-09-29T19:56:35.00 10.0 undecidable manual PG 318 0.3774 0.69 0.9
--.PCP.Z. 1990-09-29T19:56:34.76 10.0 undecidable manual PG 351 0.3996 -0.16 1.8
--.FIN.Z. 1990-09-29T19:56:32.40 10.0 undecidable manual PG 283 0.3108 -0.59 1.1
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