Earthquake with magnitude of ML 0.9 on date 01-12-2021 and time 11:32:48 (Italy) in region 1 km S Zuccarello (SV)

A magnitude ML 0.9 earthquake occured in region: 1 km S Zuccarello (SV), on

  • 01-12-2021 10:32:48 (UTC)
  • 01-12-2021 11:32:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.1, 8.113 at 5 km depth.

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

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
Zuccarello SV 1 309 309
Arnasco SV 2 645 954
Cisano sul Neva SV 3 2085 3039
Castelbianco SV 3 330 3369
Castelvecchio di Rocca Barbena SV 4 145 3514
Vendone SV 4 388 3902
Erli SV 4 245 4147
Ortovero SV 5 1586 5733
Balestrino SV 6 595 6328
Onzo SV 6 219 6547
Villanova d'Albenga SV 6 2657 9204
Nasino SV 7 207 9411
Garlenda SV 7 1254 10665
Toirano SV 8 2644 13309
Aquila d'Arroscia IM 9 166 13475
Alto CN 9 128 13603
Ranzo IM 9 557 14160
Casanova Lerrone SV 9 749 14909
Ceriale SV 10 5561 20470
Boissano SV 10 2492 22962
Albenga SV 10 24213 47175
Bardineto SV 10 756 47931
Borghetto Santo Spirito SV 11 4948 52879
Alassio SV 11 10934 63813
Borghetto d'Arroscia IM 11 456 64269
Stellanello SV 12 808 65077
Loano SV 12 11407 76484
Testico SV 12 196 76680
Garessio CN 13 3244 79924
Caprauna CN 13 104 80028
Vessalico IM 13 282 80310
Giustenice SV 13 977 81287
Laigueglia SV 14 1810 83097
Pietra Ligure SV 15 8992 92089
Villa Faraldi IM 15 444 92533
Cesio IM 15 283 92816
Magliolo SV 15 974 93790
Calizzano SV 15 1475 95265
Tovo San Giacomo SV 15 2582 97847
Andora SV 16 7552 105399
Armo IM 16 111 105510
Borgio Verezzi SV 17 2205 107715
Pieve di Teco IM 17 1338 109053
Chiusanico IM 17 607 109660
Ormea CN 17 1617 111277
Caravonica IM 17 282 111559
Diano Arentino IM 18 722 112281
Priola CN 18 701 112982
Chiusavecchia IM 18 577 113559
Rialto SV 19 564 114123
Calice Ligure SV 19 1730 115853
Lucinasco IM 19 272 116125
Diano San Pietro IM 19 1145 117270
San Bartolomeo al Mare IM 19 3129 120399
Borgomaro IM 19 865 121264
Cervo IM 19 1187 122451
Pontedassio IM 19 2323 124774
Pornassio IM 20 685 125459
Diano Castello IM 20 2214 127673
Aurigo IM 20 347 128020

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SW of Savona (61345 inhabitants)
41 Km NE of Sanremo (54807 inhabitants)
55 Km SE of Cuneo (56081 inhabitants)
74 Km W of Genova (586655 inhabitants)
89 Km S of Asti (76202 inhabitants)
99 Km SW of Alessandria (93943 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.9 2021-12-01
10:32:48
44.1002 8.113 5 2021-12-01
10:39:24
Sala Sismica INGV-Roma 98011051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-01 10:32:48 ± 0.21
Latitude 44.1002 ± 0.0081
Longitude 8.1130 ± 0.0113
Depth (km) 5 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98011051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 980
Semi-minor axis of confidence ellipse (meter) 466
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 135
Circular confidence region, given by single value of horizontal uncertainty (meter) 980
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 180
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.03507
Epicentral distance of station farthest from the epicenter (degree) 0.24641
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 98011051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-01 10:39:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.MGRO.HHZ. 2021-12-01T10:32:58.30 0.1 undecidable manual S 255 0.2266 101 0.77 78
GU.GBOS.HHZ. 2021-12-01T10:32:57.77 0.1 undecidable manual S 306 0.241 100 -0.34 90
GU.IMI.HHZ. 2021-12-01T10:32:57.97 0.1 undecidable manual S 220 0.2464 100 -0.34 90
GU.IMI.HHZ. 2021-12-01T10:32:54.16 0.1 undecidable manual P 220 0.2464 100 -0.07 95
GU.CANO.HHZ. 2021-12-01T10:32:54.29 0.3 undecidable manual S 40 0.1394 108 0.01 74
GU.GBOS.HHZ. 2021-12-01T10:32:54.08 0.3 undecidable manual P 306 0.241 100 -0.03 72
GU.MGRO.HHZ. 2021-12-01T10:32:53.73 0.1 undecidable manual P 255 0.2266 101 -0.05 96
GU.CANO.HHZ. 2021-12-01T10:32:52.07 0.1 undecidable manual P 40 0.1394 108 0.17 95
GU.RORO.HHZ. 2021-12-01T10:32:50.79 0.1 undecidable manual S 290 0.0351 141 -0.04 100
GU.RORO.HHZ. 2021-12-01T10:32:49.93 0.1 undecidable manual P 290 0.0351 141 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.RORO.HHE. ML:0 0.00036306425 0.3392 AML other m 2021-12-01T10:32:51.19
GU.RORO.HHN. ML:0 0.00032137315 0.4416 AML other m 2021-12-01T10:32:51.19
GU.IMI.HHE. ML:0.9 4.485254E-5 0.3968 AML other m 2021-12-01T10:32:58.52
GU.IMI.HHN. ML:1 5.27423895E-5 1.1584 AML other m 2021-12-01T10:32:58.32
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