Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.2 on date 30-12-1988 and time 09:11:44 (UTC) in region Costa Ligure centro occidentale (Savona)

A magnitude Md 2.2 earthquake occured in region: Costa Ligure centro occidentale (Savona), on

  • 30-12-1988 09:11:44 (UTC)
  • 30-12-1988 10:11:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2350, 8.6720 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
Celle Ligure SV 16 5237 5237
Varazze SV 16 13251 18488
Albissola Marina SV 17 5487 23975
Savona SV 17 61345 85320
Cogoleto GE 17 9172 94492
Albisola Superiore SV 17 10163 104655
Bergeggi SV 18 1129 105784
Arenzano GE 19 11519 117303
Vado Ligure SV 19 8336 125639

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km E of Savona (61345 inhabitants)
29 Km SW of Genova (586655 inhabitants)
76 Km S of Alessandria (93943 inhabitants)
83 Km SE of Asti (76202 inhabitants)
84 Km NE of Sanremo (54807 inhabitants)
91 Km E of Cuneo (56081 inhabitants)
93 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 2.2
M 2.3 		1988-12-30
09:11:44		 44.235 8.672 10 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 84329
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-12-30 09:11:44 ± 0.346
Latitude 44.2350 ± 0.0255
Longitude 8.6720 ± 0.0239
Depth (km) 10 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 84329

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) 3410.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 194
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
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) 0.00235
Epicentral distance of station farthest from the epicenter (degree) 0.01352
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:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 84329
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:19:10

M:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 84329
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
--.PZZ.Z. 1988-12-30T09:12:21.70 10.0 undecidable manual SN 284 1.1544 -0.37 0.5
--.DOI.Z. 1988-12-30T09:12:19.98 10.0 undecidable manual SN 285 1.0545 0.29 0.5
--.STV.Z. 1988-12-30T09:12:16.10 10.0 undecidable manual SG 271 0.9546 -0.81 0.3
--.BOB.Z. 1988-12-30T09:12:12.44 10.0 undecidable manual SG 46 0.7659 1.76 0
--.RRL.Z. 1988-12-30T09:12:10.90 10.0 undecidable manual PN 297 1.4985 -0.01 1.2
--.PZZ.Z. 1988-12-30T09:12:06.60 10.0 undecidable manual PN 284 1.1544 0.55 1
--.IMI.Z. 1988-12-30T09:12:06.50 10.0 undecidable manual SG 240 0.6327 -0.34 0.6
--.DOI.Z. 1988-12-30T09:12:05.24 10.0 undecidable manual PN 285 1.0545 0.57 1
--.ROB.Z. 1988-12-30T09:12:03.60 10.0 undecidable manual SG 277 0.5772 -0.96 0.2
--.STV.Z. 1988-12-30T09:12:03.70 10.0 undecidable manual PG 271 0.9546 0.63 1
--.BOB.Z. 1988-12-30T09:11:59.66 10.0 undecidable manual PG 46 0.7659 0.19 1.7
--.IMI.Z. 1988-12-30T09:11:57.20 10.0 undecidable manual PG 240 0.6327 -0.05 1.9
--.CKI.Z. 1988-12-30T09:11:57.28 10.0 undecidable manual SG 303 0.333 0.42 0.6
--.FIN.Z. 1988-12-30T09:11:56.10 10.0 undecidable manual SG 265 0.333 -0.66 0.4
--.ROB.Z. 1988-12-30T09:11:55.70 10.0 undecidable manual PG 277 0.5772 -0.24 1.8
--.GEN.Z. 1988-12-30T09:11:52.80 10.0 undecidable manual SG 46 0.2553 -1.77 0
--.FIN.Z. 1988-12-30T09:11:51.40 10.0 undecidable manual PG 265 0.333 -0.04 1.9
--.CKI.Z. 1988-12-30T09:11:51.52 10.0 positive manual PG 303 0.333 0.03 3.8
--.GEN.Z. 1988-12-30T09:11:49.30 10.0 undecidable manual PG 46 0.2553 -0.86 0.7
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