Earthquake (quarry blast) with magnitude of ML 1.0 on date 25-01-2022 and time 11:21:37 (UTC) in region 4 km SE Molini di Triora (IM)

A magnitude ML 1.0 (quarry blast) earthquake occured in region: 4 km SE Molini di Triora (IM), on

  • 25-01-2022 11:21:37 (UTC)
  • 25-01-2022 12:21:37 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.9580, 7.8030 at 6 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Event type: quarry blast.

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
Carpasio IM 5 168 1162
Triora IM 5 355 1517
Badalucco IM 6 1136 2653
Ceriana IM 9 1250 3903
Bajardo IM 9 312 4215
Rezzo IM 9 366 4581
Aurigo IM 10 347 4928
Castel Vittorio IM 11 287 5215
Pietrabruna IM 11 501 5716
Pigna IM 11 859 6575
Prelà IM 11 503 7078
Borgomaro IM 12 865 7943
Castellaro IM 12 1256 9199
Montegrosso Pian Latte IM 12 118 9317
Vasia IM 13 389 9706
Lucinasco IM 13 272 9978
Caravonica IM 13 282 10260
Mendatica IM 13 185 10445
Taggia IM 13 14116 24561
Dolcedo IM 13 1415 25976
Cosio d'Arroscia IM 13 221 26197
Pieve di Teco IM 14 1338 27535
Pompeiana IM 14 823 28358
Pornassio IM 14 685 29043
Terzorio IM 14 216 29259
Apricale IM 14 629 29888
Perinaldo IM 14 870 30758
Chiusavecchia IM 15 577 31335
Briga Alta CN 15 39 31374
Riva Ligure IM 15 2910 34284
Civezza IM 15 609 34893
Cesio IM 15 283 35176
Sanremo IM 15 54807 89983
Chiusanico IM 15 607 90590
Santo Stefano al Mare IM 16 2197 92787
Isolabona IM 16 679 93466
Cipressa IM 16 1290 94756
Costarainera IM 16 828 95584
Vessalico IM 16 282 95866
Armo IM 17 111 95977
Seborga IM 17 315 96292
Pontedassio IM 17 2323 98615
San Lorenzo al Mare IM 17 1297 99912
Rocchetta Nervina IM 18 298 100210
Borghetto d'Arroscia IM 18 456 100666
Soldano IM 19 977 101643
Dolceacqua IM 19 2074 103717
Ospedaletti IM 19 3367 107084
Testico SV 19 196 107280
Diano Arentino IM 19 722 108002
Vallebona IM 19 1310 109312
San Biagio della Cima IM 20 1329 110641
Imperia IM 20 42034 152675

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km N of Sanremo (54807 inhabitants)
52 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
Reviewed
Rev100
ML 1.0 2022-01-25
11:21:37
43.9583 7.8028 6 2022-01-25
11:27:21
Sala Sismica INGV-Roma 100167801
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-01-25 11:21:37 ± 0.11
Latitude 43.9583 ± 0.0045
Longitude 7.8028 ± 0.0087
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type quarry blast
Origin ID 100167801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 529
Semi-minor axis of confidence ellipse (meter) 519
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 199
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.08094
Epicentral distance of station farthest from the epicenter (degree) 0.73654
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 100167801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-01-25 11:27:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.PZZ.HHE. 2022-01-25T11:21:52.40 0.1 undecidable manual P 318 0.7365 50 0.31 82
GU.GBOS.HHE. 2022-01-25T11:21:48.03 0.3 undecidable manual S 5 0.2842 101 -0.59 63
GU.RORO.HHZ. 2022-01-25T11:21:47.03 0.3 undecidable manual S 51 0.2437 103 -0.08 72
GU.STV.HHZ. 2022-01-25T11:21:46.65 1.0 undecidable manual P 310 0.4461 50 -0.47 21
GU.ENR.HHE. 2022-01-25T11:21:45.93 0.1 undecidable manual P 315 0.3867 50 -0.18 91
GU.GBOS.HHE. 2022-01-25T11:21:44.35 0.1 undecidable manual P 5 0.2842 101 0.45 88
GU.BURY.HHE. 2022-01-25T11:21:43.14 0.1 undecidable manual P 225 0.2500 103 -0.01 97
GU.RORO.HHZ. 2022-01-25T11:21:43.07 0.1 undecidable manual P 51 0.2437 103 0.04 96
FR.SAOF.HHZ.00 2022-01-25T11:21:41.58 0.1 undecidable manual P 279 0.1817 107 -0.11 96
GU.IMI.HHZ. 2022-01-25T11:21:41.17 0.3 undecidable manual S 126 0.0809 125 -0.08 74
GU.MGRO.HHZ. 2022-01-25T11:21:41.55 0.3 undecidable manual S 3 0.0845 124 0.19 72
GU.IMI.HHZ. 2022-01-25T11:21:39.65 0.1 undecidable manual P 126 0.0809 125 0 100
GU.MGRO.HHZ. 2022-01-25T11:21:39.75 0.1 undecidable manual P 3 0.0845 124 0.04 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.IMI.HHE. ML:1.0 0.0001585 0.68 AML other m 2022-01-25T11:21:42.16
GU.IMI.HHN. ML:1.0 0.0001635 1.24 AML other m 2022-01-25T11:21:42.35
GU.MGRO.HHE. ML:1.3 0.00033999999999999997 1.52 AML other m 2022-01-25T11:21:43.04
GU.MGRO.HHN. ML:1.2 0.00026149999999999996 0.66 AML other m 2022-01-25T11:21:43.48
FR.SAOF.HHE.00 ML:0.8 0.00005275 0.4 AML other m 2022-01-25T11:21:48.47
FR.SAOF.HHN.00 ML:0.8 0.00004585 0.5 AML other m 2022-01-25T11:21:48.84
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