Earthquake with magnitude of Md 2.0 on date 25-04-1986 and time 21:57:41 (Italy) in region 6 km E Masone (GE)

A magnitude Md 2.0 earthquake occured in region: 6 km E Masone (GE), on

  • 25-04-1986 19:57:41 (UTC)
  • 25-04-1986 21:57:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.52, 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 6 3679 3679
Campo Ligure GE 8 2955 6634
Mele GE 9 2725 9359
Campomorone GE 9 6996 16355
Ceranesi GE 9 3875 20230
Mignanego GE 10 3675 23905
Rossiglione GE 11 2779 26684
Fraconalto AL 11 336 27020
Serra Riccò GE 12 7885 34905
Voltaggio AL 12 738 35643
Tiglieto GE 13 546 36189
Mornese AL 14 737 36926
Casaleggio Boiro AL 14 372 37298
Busalla GE 14 5563 42861
Lerma AL 14 869 43730
Bosio AL 15 1227 44957
Sant'Olcese GE 15 5906 50863
Arenzano GE 15 11519 62382
Belforte Monferrato AL 16 515 62897
Urbe SV 16 700 63597
Carrosio AL 16 510 64107
Genova GE 17 586655 650762
Tagliolo Monferrato AL 17 1581 652343
Ronco Scrivia GE 17 4417 656760
Savignone GE 17 3205 659965
Casella GE 17 3144 663109
Montaldeo AL 17 265 663374
Parodi Ligure AL 17 715 664089
Ovada AL 17 11477 675566
Cogoleto GE 18 9172 684738
Molare AL 19 2181 686919
Gavi AL 19 4614 691533
Isola del Cantone GE 20 1540 693073
San Cristoforo AL 20 608 693681
Castelletto d'Orba AL 20 2047 695728

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km NW of Genova (586655 inhabitants)
34 Km NE of Savona (61345 inhabitants)
46 Km SE of Alessandria (93943 inhabitants)
63 Km SE of Asti (76202 inhabitants)
80 Km SW of Pavia (72576 inhabitants)
89 Km S of Vigevano (63310 inhabitants)
93 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 Md 2.0 1986-04-25
19:57:41
44.52 8.79 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 26019
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-04-25 19:57:41 ± 0.365
Latitude 44.52 ± 0.03
Longitude 8.79 ± 0.01
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 26019

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) 3329.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 237
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.0013
Epicentral distance of station farthest from the epicenter (degree) 0.00615
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 26019
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:27:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ROB.Z. 1986-04-25T19:58:05.10 10.0 undecidable manual SG 252 0.0062 -0.45 0.2
--.FIN.Z. 1986-04-25T19:58:00.40 10.0 undecidable manual SG 233 0.0046 0.34 0.5
--.ROB.Z. 1986-04-25T19:57:55.20 10.0 undecidable manual PG 252 0.0062 -0.21 1.4
--.CKI.Z. 1986-04-25T19:57:55.00 10.0 undecidable manual SG 255 0.0033 -0.55 0.2
--.FIN.Z. 1986-04-25T19:57:52.50 10.0 undecidable manual PG 233 0.0046 0.26 1.5
--.CKI.Z. 1986-04-25T19:57:50.00 10.0 undecidable manual PG 255 0.0033 0.36 1.1
--.GEN.Z. 1986-04-25T19:57:48.00 10.0 undecidable manual SG 132 0.0013 -0.16 0.8
--.GEN.Z. 1986-04-25T19:57:45.30 10.0 undecidable manual PG 132 0.0013 -0.07 2.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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