Earthquake (quarry blast) with magnitude of ML 0.5 on date 07-10-2022 and time 11:53:49 (Italy) in region 1 km W Erli (SV)

A magnitude ML 0.5 (quarry blast) earthquake occured in region: 1 km W Erli (SV), on

  • 07-10-2022 09:53:49 (UTC)
  • 07-10-2022 11:53:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1330, 8.0950 at 0 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
Erli SV 1 245 245
Castelvecchio di Rocca Barbena SV 2 145 390
Castelbianco SV 3 330 720
Zuccarello SV 3 309 1029
Nasino SV 6 207 1236
Arnasco SV 6 645 1881
Cisano sul Neva SV 6 2085 3966
Balestrino SV 7 595 4561
Vendone SV 7 388 4949
Bardineto SV 7 756 5705
Alto CN 8 128 5833
Onzo SV 8 219 6052
Ortovero SV 9 1586 7638
Aquila d'Arroscia IM 9 166 7804
Garessio CN 9 3244 11048
Toirano SV 9 2644 13692
Ranzo IM 10 557 14249
Boissano SV 10 2492 16741
Villanova d'Albenga SV 10 2657 19398
Garlenda SV 11 1254 20652
Caprauna CN 11 104 20756
Calizzano SV 12 1475 22231
Ceriale SV 12 5561 27792
Casanova Lerrone SV 12 749 28541
Borghetto Santo Spirito SV 12 4948 33489
Borghetto d'Arroscia IM 12 456 33945
Giustenice SV 13 977 34922
Albenga SV 13 24213 59135
Loano SV 13 11407 70542
Priola CN 14 701 71243
Magliolo SV 14 974 72217
Vessalico IM 14 282 72499
Ormea CN 15 1617 74116
Tovo San Giacomo SV 15 2582 76698
Testico SV 15 196 76894
Stellanello SV 15 808 77702
Alassio SV 15 10934 88636
Armo IM 15 111 88747
Pietra Ligure SV 15 8992 97739
Cesio IM 17 283 98022
Borgio Verezzi SV 17 2205 100227
Pieve di Teco IM 17 1338 101565
Rialto SV 17 564 102129
Calice Ligure SV 18 1730 103859
Laigueglia SV 18 1810 105669
Villa Faraldi IM 18 444 106113
Osiglia SV 19 444 106557
Massimino SV 19 113 106670
Caravonica IM 19 282 106952
Pornassio IM 19 685 107637
Chiusanico IM 19 607 108244
Bagnasco CN 19 1035 109279
Andora SV 20 7552 116831
Bormida SV 20 387 117218

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SW of Savona (61345 inhabitants)
43 Km NE of Sanremo (54807 inhabitants)
52 Km SE of Cuneo (56081 inhabitants)
74 Km W of Genova (586655 inhabitants)
86 Km S of Asti (76202 inhabitants)
96 Km SW of Alessandria (93943 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 0.5 2022-10-07
09:53:49
44.1328 8.0947 1 2022-10-07
10:02:20
Sala Sismica INGV-Roma 110578301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-10-07 09:53:49 ± 0.18
Latitude 44.1328 ± 0.0144
Longitude 8.0947 ± 0.0150
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type quarry blast
Origin ID 110578301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1790
Semi-minor axis of confidence ellipse (meter) 850
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 327
Circular confidence region, given by single value of horizontal uncertainty (meter) 1790.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 171
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) 0.02878
Epicentral distance of station farthest from the epicenter (degree) 0.49463
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 110578301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-10-07 10:02:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.ENR.HHZ. 2022-10-07T09:54:00.20 0.6 undecidable manual P 281 0.4946 91 0.04 48
GU.GBOS.HHZ. 2022-10-07T09:53:54.05 0.1 undecidable manual P 301 0.2122 91 0.15 98
IV.QLNO.HHZ. 2022-10-07T09:53:54.75 0.3 undecidable manual P 43 0.2626 91 -0.26 71
GU.MGRO.HHZ. 2022-10-07T09:53:53.79 0.1 undecidable manual P 246 0.2248 91 -0.38 94
GU.CANO.HHZ. 2022-10-07T09:53:52.18 0.3 undecidable manual P 54 0.1268 92 0.19 74
GU.RORO.HHZ. 2022-10-07T09:53:50.05 0.1 undecidable manual P 225 0.0288 99 0.24 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.CANO.HHN. ML:0.6 0.00005622452 0.32 AML other m 2022-10-07T09:53:54.68
GU.MGRO.HHE. ML:0.6 0.000026063276699999997 0.1024 AML other m 2022-10-07T09:53:58.42
GU.MGRO.HHN. ML:0.7 0.000033304065 0.2176 AML other m 2022-10-07T09:53:58.70
GU.GBOS.HHN. ML:0.2 0.000008577496500000001 0.1984 AML other m 2022-10-07T09:53:58.23
IV.QLNO.HHE. ML:0.4 0.000014712841500000001 0.2944 AML other m 2022-10-07T09:54:02.17
IV.QLNO.HHN. ML:0.3 0.0000093473675 0.1984 AML other m 2022-10-07T09:54:02.46
GU.ENR.HHE. ML:0.3 0.000005871912999999999 0.2624 AML other m 2022-10-07T09:54:08.56
GU.ENR.HHN. ML:0.6 0.0000098010145 0.1792 AML other m 2022-10-07T09:54:07.69
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