Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.1 on date 30-04-1990 and time 19:13:43 (UTC) in region 6 km E Mele (GE)

A magnitude Md 2.1 earthquake occured in region: 6 km E Mele (GE), on

  • 30-04-1990 19:13:43 (UTC)
  • 30-04-1990 21:13:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.4460, 8.8210 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.

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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
Mele GE 6 2725 2725
Ceranesi GE 9 3875 6600
Campomorone GE 9 6996 13596
Genova GE 10 586655 600251
Masone GE 11 3679 603930
Serra Riccò GE 12 7885 611815
Arenzano GE 12 11519 623334
Mignanego GE 12 3675 627009
Sant'Olcese GE 13 5906 632915
Campo Ligure GE 14 2955 635870
Cogoleto GE 15 9172 645042
Fraconalto AL 17 336 645378
Busalla GE 17 5563 650941
Casella GE 17 3144 654085
Rossiglione GE 18 2779 656864
Tiglieto GE 18 546 657410
Urbe SV 19 700 658110
Savignone GE 19 3205 661315
Montoggio GE 19 2067 663382
Voltaggio AL 20 738 664120

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km W of Genova (586655 inhabitants)
31 Km E of Savona (61345 inhabitants)
55 Km SE of Alessandria (93943 inhabitants)
70 Km SE of Asti (76202 inhabitants)
87 Km SW of Pavia (72576 inhabitants)
89 Km W of La Spezia (93959 inhabitants)
97 Km SW of Piacenza (102191 inhabitants)
97 Km S of Vigevano (63310 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 2.4 		1990-04-30
19:13:43		 44.446 8.821 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 115609
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-04-30 19:13:43 ± 0.274
Latitude 44.4460 ± 0.0233
Longitude 8.8210 ± 0.0217
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 115609

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) 3110.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 186
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
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) 0.00194
Epicentral distance of station farthest from the epicenter (degree) 0.01635
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 115609
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:47:29

M:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 115609
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
--.LPG.Z. 1990-04-30T19:14:39.00 10.0 undecidable manual SN 306 1.7982 0.48 0.4
--.LPL.Z. 1990-04-30T19:14:39.60 10.0 undecidable manual SN 306 1.8204 0.57 0.4
--.SBF.Z. 1990-04-30T19:14:23.10 10.0 undecidable manual SN 239 1.1544 0.04 0.7
--.LPL.Z. 1990-04-30T19:14:17.60 10.0 undecidable manual PN 306 1.8204 1.9 0
--.LPG.Z. 1990-04-30T19:14:16.80 10.0 undecidable manual PN 306 1.7982 1.39 0.1
--.RRL.Z. 1990-04-30T19:14:12.20 10.0 undecidable manual PN 288 1.5207 0.63 1
--.LSD.Z. 1990-04-30T19:14:12.40 10.0 undecidable manual PN 311 1.5429 0.05 1.5
--.RSP.Z. 1990-04-30T19:14:07.66 10.0 undecidable manual PN 302 1.3098 -1.05 0.5
--.SBF.Z. 1990-04-30T19:14:07.40 10.0 undecidable manual PN 239 1.1544 0.92 0.7
--.STV.Z. 1990-04-30T19:14:05.18 10.0 undecidable manual PN 259 1.0767 -0.36 1.6
--.ENR.Z. 1990-04-30T19:14:04.18 10.0 undecidable manual PG 257 1.0101 -0.3 1.6
--.BOB.Z. 1990-04-30T19:14:03.50 10.0 undecidable manual SG 53 0.5439 -0.83 0.3
--.CKI.Z. 1990-04-30T19:13:58.00 10.0 undecidable manual SG 266 0.3885 -0.88 0.3
--.ROB.Z. 1990-04-30T19:13:57.74 10.0 undecidable manual PG 258 0.6882 -0.58 1.2
--.FIN.Z. 1990-04-30T19:13:55.40 10.0 undecidable manual PG 241 0.4995 0.32 1.6
--.BOB.Z. 1990-04-30T19:13:55.50 10.0 undecidable manual PG 53 0.5439 -0.16 1.8
--.CKI.Z. 1990-04-30T19:13:52.00 10.0 undecidable manual PG 266 0.3885 -0.52 1.3
--.PCP.Z. 1990-04-30T19:13:48.70 10.0 undecidable manual PG 295 0.2109 -0.09 1.8
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