Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 0.7 on date 11-01-2022 and time 17:21:39 (Italy) in region 1 km NE Arnasco (SV)

A magnitude ML 0.7 (quarry blast) earthquake occured in region: 1 km NE Arnasco (SV), on

  • 11-01-2022 16:21:39 (UTC)
  • 11-01-2022 17:21:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0910, 8.1130 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Arnasco SV 1 645 645
Zuccarello SV 2 309 954
Cisano sul Neva SV 3 2085 3039
Vendone SV 4 388 3427
Castelbianco SV 4 330 3757
Ortovero SV 4 1586 5343
Castelvecchio di Rocca Barbena SV 5 145 5488
Erli SV 5 245 5733
Onzo SV 5 219 5952
Villanova d'Albenga SV 6 2657 8609
Balestrino SV 6 595 9204
Garlenda SV 6 1254 10458
Nasino SV 7 207 10665
Casanova Lerrone SV 8 749 11414
Ranzo IM 9 557 11971
Toirano SV 9 2644 14615
Aquila d'Arroscia IM 9 166 14781
Alto CN 9 128 14909
Albenga SV 9 24213 39122
Ceriale SV 10 5561 44683
Boissano SV 10 2492 47175
Alassio SV 10 10934 58109
Borghetto Santo Spirito SV 11 4948 63057
Stellanello SV 11 808 63865
Borghetto d'Arroscia IM 11 456 64321
Testico SV 11 196 64517
Bardineto SV 12 756 65273
Loano SV 13 11407 76680
Vessalico IM 13 282 76962
Caprauna CN 13 104 77066
Laigueglia SV 13 1810 78876
Garessio CN 14 3244 82120
Villa Faraldi IM 14 444 82564
Giustenice SV 14 977 83541
Cesio IM 14 283 83824
Andora SV 15 7552 91376
Pietra Ligure SV 15 8992 100368
Tovo San Giacomo SV 16 2582 102950
Armo IM 16 111 103061
Magliolo SV 16 974 104035
Calizzano SV 16 1475 105510
Chiusanico IM 16 607 106117
Caravonica IM 16 282 106399
Pieve di Teco IM 16 1338 107737
Diano Arentino IM 17 722 108459
Chiusavecchia IM 17 577 109036
Borgio Verezzi SV 17 2205 111241
Ormea CN 17 1617 112858
Diano San Pietro IM 18 1145 114003
San Bartolomeo al Mare IM 18 3129 117132
Lucinasco IM 18 272 117404
Cervo IM 18 1187 118591
Pontedassio IM 18 2323 120914
Borgomaro IM 18 865 121779
Priola CN 19 701 122480
Diano Castello IM 19 2214 124694
Aurigo IM 19 347 125041
Rialto SV 19 564 125605
Calice Ligure SV 19 1730 127335
Pornassio IM 19 685 128020

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SW of Savona (61345 inhabitants)
40 Km NE of Sanremo (54807 inhabitants)
56 Km SE of Cuneo (56081 inhabitants)
75 Km W of Genova (586655 inhabitants)
90 Km S of Asti (76202 inhabitants)
100 Km SW of Alessandria (93943 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
Bulletin
Rev1000 		ML 0.7 2022-01-11
16:21:39		 44.0908 8.1133 1 2022-07-08
12:33:47		 Bollettino Sismico Italiano INGV 103567791
Reviewed
Rev100 		ML 0.7 2022-01-11
16:21:39		 44.101 8.1067 4 2022-01-11
16:27:21		 Sala Sismica INGV-Roma 99644071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-01-11 16:21:39 ± 0.18
Latitude 44.0908 ± 0.0099
Longitude 8.1133 ± 0.0138
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 103567791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1280
Semi-minor axis of confidence ellipse (meter) 780
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 315
Circular confidence region, given by single value of horizontal uncertainty (meter) 1280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 184
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.03957
Epicentral distance of station farthest from the epicenter (degree) 0.24731
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 103567791
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-04-21 14:01:13

ML:0.7

Field Value
Value 0.7
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 99644071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-01-11 16:27:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.IMI.HHZ. 2022-01-11T16:21:45.06 0.3 undecidable manual P 221 26.6511 91 0.02 75
GU.GBOS.HHZ. 2022-01-11T16:21:44.94 0.3 undecidable manual P 308 27.4503 91 -0.26 71
GU.MGRO.HHZ. 2022-01-11T16:21:44.65 0.1 undecidable manual P 258 24.9528 91 -0.05 100
GU.CANO.HHZ. 2022-01-11T16:21:42.96 0.3 undecidable manual P 37 16.2726 92 0 77
GU.RORO.HHZ. 2022-01-11T16:21:40.81 0.1 undecidable manual P 303 4.3956 96 0.21 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.CANO.HHN. ML:0.3 0.000018997510000000003 0.1152 AML other m 2022-01-11T16:21:45.72
GU.MGRO.HNE. ML:1.2 0.000101740815 1.0016 AML other m 2022-01-11T16:21:48.14
GU.MGRO.HHN. ML:0.5 0.000019142071 0.272 AML other m 2022-01-11T16:21:48.53
GU.MGRO.HNN. ML:1.1 0.00009168546999999999 0.0672 AML other m 2022-01-11T16:21:48.63
GU.IMI.HHN. ML:1.0 0.00006216763 1.1392 AML other m 2022-01-11T16:21:49.82
GU.GBOS.HHE. ML:0.2 0.00001104676395 0.2208 AML other m 2022-01-11T16:21:49.99
GU.CANO.HHE. ML:0.7 0.00005517304 1.1552 AML other m 2022-01-11T16:21:50.07
GU.GBOS.HHN. ML:0.7 0.000028711399999999998 0.784 AML other m 2022-01-11T16:21:51.07
GU.MGRO.HHE. ML:0.7 0.000028432305000000003 1.3216 AML other m 2022-01-11T16:21:51.68
GU.IMI.HHE. ML:0.8 0.000041910965 1.3088 AML other m 2022-01-11T16:21:54.05
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download