Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.0 on date 01-05-1990 and time 17:47:40 (Italy) in region 7 km E Masone (GE)

A magnitude Md 2.0 earthquake occured in region: 7 km E Masone (GE), on

  • 01-05-1990 15:47:40 (UTC)
  • 01-05-1990 17:47:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.5310, 8.7920 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
Masone GE 7 3679 3679
Campo Ligure GE 8 2955 6634
Campomorone GE 9 6996 13630
Ceranesi GE 9 3875 17505
Mignanego GE 10 3675 21180
Fraconalto AL 10 336 21516
Mele GE 10 2725 24241
Rossiglione GE 10 2779 27020
Voltaggio AL 11 738 27758
Serra Riccò GE 12 7885 35643
Mornese AL 12 737 36380
Casaleggio Boiro AL 13 372 36752
Busalla GE 13 5563 42315
Bosio AL 13 1227 43542
Lerma AL 13 869 44411
Tiglieto GE 14 546 44957
Belforte Monferrato AL 15 515 45472
Carrosio AL 15 510 45982
Sant'Olcese GE 15 5906 51888
Tagliolo Monferrato AL 16 1581 53469
Ronco Scrivia GE 16 4417 57886
Montaldeo AL 16 265 58151
Parodi Ligure AL 16 715 58866
Savignone GE 16 3205 62071
Urbe SV 16 700 62771
Casella GE 17 3144 65915
Ovada AL 17 11477 77392
Arenzano GE 17 11519 88911
Genova GE 17 586655 675566
Gavi AL 18 4614 680180
Molare AL 18 2181 682361
Isola del Cantone GE 18 1540 683901
San Cristoforo AL 18 608 684509
Castelletto d'Orba AL 19 2047 686556
Arquata Scrivia AL 19 6409 692965
Crocefieschi GE 19 548 693513
Rocca Grimalda AL 19 1512 695025
Cogoleto GE 19 9172 704197
Silvano d'Orba AL 20 1988 706185

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km NW of Genova (586655 inhabitants)
35 Km NE of Savona (61345 inhabitants)
45 Km SE of Alessandria (93943 inhabitants)
62 Km SE of Asti (76202 inhabitants)
78 Km SW of Pavia (72576 inhabitants)
88 Km S of Vigevano (63310 inhabitants)
92 Km SW of Piacenza (102191 inhabitants)
95 Km W of La Spezia (93959 inhabitants)
100 Km E 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
Bulletin
Rev1000 		Md 2.0
M 2.0 		1990-05-01
15:47:40		 44.531 8.792 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 115699
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-05-01 15:47:40 ± 0.834
Latitude 44.5310 ± 0.0448
Longitude 8.7920 ± 0.0581
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 115699

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) 6787.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 319
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
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) 0.00154
Epicentral distance of station farthest from the epicenter (degree) 0.00971
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

Md:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 115699
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:47:34

M:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 115699
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
--.STV.Z. 1990-05-01T15:48:01.48 10.0 undecidable manual PN 255 1.0767 0.46 0
--.ENR.Z. 1990-05-01T15:47:59.34 10.0 undecidable manual PG 253 1.0212 -0.91 0.2
--.ROB.Z. 1990-05-01T15:47:54.90 10.0 undecidable manual PG 250 0.6882 -0.02 1.4
--.CKI.Z. 1990-05-01T15:47:54.46 10.0 undecidable manual SG 253 0.3774 0.13 0.6
--.FIN.Z. 1990-05-01T15:47:51.31 10.0 undecidable manual PG 232 0.5217 0.3 1.2
--.CKI.Z. 1990-05-01T15:47:48.57 10.0 undecidable manual PG 253 0.3774 0.25 1.3
--.PCP.Z. 1990-05-01T15:47:44.86 10.0 undecidable manual PG 273 0.1665 0.36 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