Earthquake with magnitude of ML 0.8 on date 15-10-2021 and time 17:04:13 (Italy) in region Cisano sul Neva (SV)

A magnitude ML 0.8 earthquake occured in region: Cisano sul Neva (SV), on

  • 15-10-2021 15:04:13 (UTC)
  • 15-10-2021 17:04:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.087, 8.144 at 6 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
Cisano sul Neva SV 0 2085 2085
Arnasco SV 3 645 2730
Zuccarello SV 4 309 3039
Villanova d'Albenga SV 4 2657 5696
Balestrino SV 5 595 6291
Castelvecchio di Rocca Barbena SV 5 145 6436
Ortovero SV 5 1586 8022
Vendone SV 6 388 8410
Castelbianco SV 6 330 8740
Erli SV 6 245 8985
Toirano SV 7 2644 11629
Albenga SV 7 24213 35842
Garlenda SV 7 1254 37096
Ceriale SV 7 5561 42657
Onzo SV 8 219 42876
Boissano SV 8 2492 45368
Borghetto Santo Spirito SV 9 4948 50316
Alassio SV 9 10934 61250
Nasino SV 10 207 61457
Casanova Lerrone SV 10 749 62206
Loano SV 11 11407 73613
Ranzo IM 11 557 74170
Aquila d'Arroscia IM 11 166 74336
Alto CN 11 128 74464
Stellanello SV 12 808 75272
Bardineto SV 12 756 76028
Laigueglia SV 12 1810 77838
Testico SV 13 196 78034
Giustenice SV 13 977 79011
Pietra Ligure SV 13 8992 88003
Borghetto d'Arroscia IM 13 456 88459
Villa Faraldi IM 14 444 88903
Tovo San Giacomo SV 14 2582 91485
Andora SV 14 7552 99037
Magliolo SV 15 974 100011
Vessalico IM 15 282 100293
Borgio Verezzi SV 15 2205 102498
Garessio CN 15 3244 105742
Caprauna CN 15 104 105846
Cesio IM 16 283 106129
Calizzano SV 17 1475 107604
Diano Arentino IM 17 722 108326
Chiusanico IM 17 607 108933
San Bartolomeo al Mare IM 18 3129 112062
Calice Ligure SV 18 1730 113792
Caravonica IM 18 282 114074
Cervo IM 18 1187 115261
Diano San Pietro IM 18 1145 116406
Rialto SV 18 564 116970
Armo IM 18 111 117081
Chiusavecchia IM 18 577 117658
Finale Ligure SV 19 11711 129369
Pieve di Teco IM 19 1338 130707
Diano Castello IM 19 2214 132921
Pontedassio IM 19 2323 135244
Lucinasco IM 20 272 135516
Ormea CN 20 1617 137133
Borgomaro IM 20 865 137998

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SW of Savona (61345 inhabitants)
41 Km NE of Sanremo (54807 inhabitants)
58 Km SE of Cuneo (56081 inhabitants)
73 Km W of Genova (586655 inhabitants)
91 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 the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.8 2021-10-15
15:04:13
44.0868 8.1438 6 2021-10-15
15:09:40
Sala Sismica INGV-Roma 96615411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-15 15:04:13 ± 0.22
Latitude 44.0868 ± 0.0090
Longitude 8.1438 ± 0.0113
Depth (km) 6 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96615411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1231
Semi-minor axis of confidence ellipse (meter) 385
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) 1230
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 195
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.27789
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 4
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 96615411
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-15 15:09:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SARZ.HHZ. 2021-10-15T15:04:30.05 3.0 negative manual P -0.24 0
GU.MGRO.HHZ. 2021-10-15T15:04:23.65 0.3 undecidable manual S 260 0.2446 102 0.04 75
GU.IMI.HHZ. 2021-10-15T15:04:23.78 0.1 undecidable manual S 226 0.2518 102 -0.09 99
IV.QLNO.HHZ. 2021-10-15T15:04:20.03 0.3 undecidable manual P 31 0.2779 101 -0.21 72
GU.CANO.HHZ. 2021-10-15T15:04:19.57 0.3 undecidable manual S 29 0.1376 111 -0.08 76
GU.MGRO.HHZ. 2021-10-15T15:04:19.50 0.1 undecidable manual P 260 0.2446 102 -0.03 100
GU.IMI.HHZ. 2021-10-15T15:04:19.78 0.1 undecidable manual P 226 0.2518 102 0.1 98
GU.CANO.HHZ. 2021-10-15T15:04:17.46 0.1 undecidable manual P 29 0.1376 111 0.22 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.CANO.HHN. ML:0.6 4.356949E-5 0.1792 AML other m 2021-10-15T15:04:20.37
GU.MGRO.HHE. ML:0.8 3.9427835E-5 0.2432 AML other m 2021-10-15T15:04:24.83
GU.MGRO.HHN. ML:1 4.7897335E-5 0.6016 AML other m 2021-10-15T15:04:24.79
GU.IMI.HHN. ML:0.7 2.455688E-5 0.1152 AML other m 2021-10-15T15:04:24.61
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