ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of M 2.0 on date 02-04-1985 and time 01:29:16 (Italy) in region 7 km E Masone (GE)

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

  • 01-04-1985 23:29:16 (UTC)
  • 02-04-1985 01:29:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.53, 8.79 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
Masone GE 7 3679 3679
Campo Ligure GE 7 2955 6634
Campomorone GE 9 6996 13630
Ceranesi GE 9 3875 17505
Fraconalto AL 10 336 17841
Rossiglione GE 10 2779 20620
Mignanego GE 10 3675 24295
Mele GE 10 2725 27020
Voltaggio AL 11 738 27758
Serra Riccò GE 12 7885 35643
Casaleggio Boiro AL 12 372 36015
Mornese AL 12 737 36752
Lerma AL 13 869 37621
Bosio AL 13 1227 38848
Busalla GE 13 5563 44411
Tiglieto GE 13 546 44957
Belforte Monferrato AL 14 515 45472
Carrosio AL 15 510 45982
Tagliolo Monferrato AL 15 1581 47563
Sant'Olcese GE 15 5906 53469
Montaldeo AL 16 265 53734
Parodi Ligure AL 16 715 54449
Ronco Scrivia GE 16 4417 58866
Savignone GE 16 3205 62071
Ovada AL 16 11477 73548
Urbe SV 16 700 74248
Casella GE 17 3144 77392
Arenzano GE 17 11519 88911
Gavi AL 17 4614 93525
Genova GE 18 586655 680180
Molare AL 18 2181 682361
San Cristoforo AL 18 608 682969
Isola del Cantone GE 18 1540 684509
Castelletto d'Orba AL 18 2047 686556
Arquata Scrivia AL 19 6409 692965
Rocca Grimalda AL 19 1512 694477
Crocefieschi GE 19 548 695025
Silvano d'Orba AL 19 1988 697013
Cogoleto GE 20 9172 706185
Cremolino AL 20 1086 707271
Cassinelle AL 20 914 708185

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km NW of Genova (586655 inhabitants)
35 Km NE of Savona (61345 inhabitants)
44 Km SE of Alessandria (93943 inhabitants)
62 Km SE of Asti (76202 inhabitants)
78 Km SW of Pavia (72576 inhabitants)
87 Km S of Vigevano (63310 inhabitants)
92 Km SW of Piacenza (102191 inhabitants)
95 Km W of La Spezia (93959 inhabitants)
99 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
Rev 1000 M 2.0 1985-04-01
23:29:16
44.53 8.79 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 3899
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-01 23:29:16 ± 0.536
Latitude 44.53 ± 0.04
Longitude 8.79 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 3899

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) 4258.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 246
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
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) 0.00138
Epicentral distance of station farthest from the epicenter (degree) 0.00623
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

M:2

Field Value
Value 2
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 3899
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 Takeoff_angle Residual Weight
--.ROB.Z. 1985-04-01T23:29:40.00 10.0 undecidable manual SG 250 0.0062 -0.87 0.1
--.FIN.Z. 1985-04-01T23:29:35.60 10.0 undecidable manual SG 232 0.0047 0.08 0.8
--.ROB.Z. 1985-04-01T23:29:30.50 10.0 undecidable manual PG 250 0.0062 -0.14 1.6
--.FIN.Z. 1985-04-01T23:29:28.20 10.0 undecidable manual PG 232 0.0047 0.65 0.6
--.GEN.Z. 1985-04-01T23:29:23.40 10.0 undecidable manual SG 137 0.0014 -0.22 0.8
--.GEN.Z. 1985-04-01T23:29:20.60 10.0 undecidable manual PG 137 0.0014 -0.09 2.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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