Earthquake with magnitude of M 2.0 on date 25-02-1985 and time 17:33:32 (Italy) in region 4 km SE Molini di Triora (IM)

A magnitude M 2.0 earthquake occured in region: 4 km SE Molini di Triora (IM), on

  • 25-02-1985 16:33:32 (UTC)
  • 25-02-1985 17:33:32 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.9550, 7.7960 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
Molini di Triora IM 4 617 617
Montalto Ligure IM 5 377 994
Triora IM 5 355 1349
Carpasio IM 6 168 1517
Badalucco IM 6 1136 2653
Bajardo IM 8 312 2965
Ceriana IM 8 1250 4215
Rezzo IM 10 366 4581
Castel Vittorio IM 10 287 4868
Aurigo IM 11 347 5215
Pigna IM 11 859 6074
Pietrabruna IM 11 501 6575
Castellaro IM 12 1256 7831
Prelà IM 12 503 8334
Borgomaro IM 12 865 9199
Montegrosso Pian Latte IM 13 118 9317
Vasia IM 13 389 9706
Taggia IM 13 14116 23822
Pompeiana IM 14 823 24645
Lucinasco IM 14 272 24917
Apricale IM 14 629 25546
Dolcedo IM 14 1415 26961
Mendatica IM 14 185 27146
Perinaldo IM 14 870 28016
Cosio d'Arroscia IM 14 221 28237
Caravonica IM 14 282 28519
Terzorio IM 14 216 28735
Pieve di Teco IM 14 1338 30073
Pornassio IM 14 685 30758
Riva Ligure IM 15 2910 33668
Sanremo IM 15 54807 88475
Briga Alta CN 15 39 88514
Civezza IM 15 609 89123
Isolabona IM 15 679 89802
Chiusavecchia IM 15 577 90379
Santo Stefano al Mare IM 15 2197 92576
Cesio IM 16 283 92859
Cipressa IM 16 1290 94149
Chiusanico IM 16 607 94756
Costarainera IM 16 828 95584
Seborga IM 16 315 95899
Vessalico IM 17 282 96181
Rocchetta Nervina IM 17 298 96479
San Lorenzo al Mare IM 18 1297 97776
Pontedassio IM 18 2323 100099
Armo IM 18 111 100210
Dolceacqua IM 18 2074 102284
Soldano IM 18 977 103261
Ospedaletti IM 18 3367 106628
Vallebona IM 19 1310 107938
Borghetto d'Arroscia IM 19 456 108394
San Biagio della Cima IM 19 1329 109723
Testico SV 20 196 109919
Diano Arentino IM 20 722 110641

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km N of Sanremo (54807 inhabitants)
53 Km SE of Cuneo (56081 inhabitants)
67 Km SW of Savona (61345 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 1985-02-25
16:33:32
43.955 7.796 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 2519
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-25 16:33:32 ± 0.233
Latitude 43.9550 ± 0.0368
Longitude 7.7960 ± 0.0148
Depth (km) 10 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 2519

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) 4261.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 192
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.00065
Epicentral distance of station farthest from the epicenter (degree) 0.00397
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

M:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 2519
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
--.STV.Z. 1985-02-25T16:33:47.50 10.0 undecidable manual SG 311 0.0040 -0.77 0
--.FIN.Z. 1985-02-25T16:33:46.00 10.0 undecidable manual SG 49 0.0035 -0.43 0.2
--.ENR.Z. 1985-02-25T16:33:46.10 10.0 undecidable manual SG 315 0.0034 -0.11 0.6
--.ROB.Z. 1985-02-25T16:33:45.10 10.0 undecidable manual SG 9 0.0032 -0.1 0.6
--.STV.Z. 1985-02-25T16:33:41.30 10.0 undecidable manual PG 311 0.0040 -0.1 1.4
--.ROB.Z. 1985-02-25T16:33:40.00 10.0 undecidable manual PG 9 0.0032 0.37 0.7
--.FIN.Z. 1985-02-25T16:33:40.40 10.0 undecidable manual PG 49 0.0035 0.06 1.6
--.ENR.Z. 1985-02-25T16:33:40.60 10.0 undecidable manual PG 315 0.0034 0.39 0.7
--.IMP.Z. 1985-02-25T16:33:34.60 10.0 undecidable manual PG 118 0.0006 -0.09 3.2
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