Earthquake with magnitude of M 2.0 on date 01-04-1985 and time 22:53:00 (Italy) in region 6 km E Campo Ligure (GE)

A magnitude M 2.0 earthquake occured in region: 6 km E Campo Ligure (GE), on

  • 01-04-1985 20:53:00 (UTC)
  • 01-04-1985 22:53:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.5440, 8.7770 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
Campo Ligure GE 6 2955 2955
Masone GE 7 3679 6634
Rossiglione GE 9 2779 9413
Fraconalto AL 10 336 9749
Campomorone GE 10 6996 16745
Voltaggio AL 10 738 17483
Ceranesi GE 10 3875 21358
Casaleggio Boiro AL 11 372 21730
Mornese AL 11 737 22467
Mignanego GE 11 3675 26142
Mele GE 11 2725 28867
Lerma AL 11 869 29736
Bosio AL 12 1227 30963
Tiglieto GE 13 546 31509
Belforte Monferrato AL 13 515 32024
Serra Riccò GE 13 7885 39909
Busalla GE 14 5563 45472
Carrosio AL 14 510 45982
Tagliolo Monferrato AL 14 1581 47563
Montaldeo AL 14 265 47828
Parodi Ligure AL 14 715 48543
Ovada AL 15 11477 60020
Urbe SV 16 700 60720
Ronco Scrivia GE 16 4417 65137
Gavi AL 16 4614 69751
Molare AL 16 2181 71932
Sant'Olcese GE 17 5906 77838
San Cristoforo AL 17 608 78446
Castelletto d'Orba AL 17 2047 80493
Savignone GE 17 3205 83698
Arenzano GE 17 11519 95217
Rocca Grimalda AL 18 1512 96729
Casella GE 18 3144 99873
Silvano d'Orba AL 18 1988 101861
Arquata Scrivia AL 18 6409 108270
Isola del Cantone GE 18 1540 109810
Cremolino AL 18 1086 110896
Cassinelle AL 19 914 111810
Genova GE 19 586655 698465
Cogoleto GE 20 9172 707637

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km NW of Genova (586655 inhabitants)
35 Km NE of Savona (61345 inhabitants)
43 Km SE of Alessandria (93943 inhabitants)
60 Km SE of Asti (76202 inhabitants)
78 Km SW of Pavia (72576 inhabitants)
86 Km S of Vigevano (63310 inhabitants)
92 Km SW of Piacenza (102191 inhabitants)
97 Km NW of La Spezia (93959 inhabitants)
99 Km E of Cuneo (56081 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
M 2.0 1985-04-01
20:53:00
44.544 8.777 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 3889
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-01 20:53:00 ± 0.493
Latitude 44.5440 ± 0.0340
Longitude 8.7770 ± 0.0151
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 3889

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) 3966.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 247
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) 0.00146
Epicentral distance of station farthest from the epicenter (degree) 0.00615
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:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 3889
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. 1985-04-01T20:53:23.60 10.0 undecidable manual SG 249 0.0062 -0.73 0.1
--.FIN.Z. 1985-04-01T20:53:19.30 10.0 undecidable manual SG 230 0.0047 0.17 0.8
--.ROB.Z. 1985-04-01T20:53:14.00 10.0 undecidable manual PG 249 0.0062 -0.18 1.6
--.FIN.Z. 1985-04-01T20:53:11.70 10.0 undecidable manual PG 230 0.0047 0.53 0.8
--.GEN.Z. 1985-04-01T20:53:07.30 10.0 undecidable manual SG 137 0.0015 -0.38 0.5
--.GEN.Z. 1985-04-01T20:53:04.60 10.0 undecidable manual PG 137 0.0015 0.04 2.2
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download