Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 01-10-2021 and time 19:17:09 (Italy) in region 4 km S Calice al Cornoviglio (SP)

A magnitude ML 0.9 earthquake occured in region: 4 km S Calice al Cornoviglio (SP), on

  • 01-10-2021 17:17:09 (UTC)
  • 01-10-2021 19:17:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2040, 9.8400 at 11 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.

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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
Calice al Cornoviglio SP 4 1138 1138
Follo SP 5 6337 7475
Bolano SP 5 7813 15288
Beverino SP 6 2429 17717
Santo Stefano di Magra SP 8 9360 27077
Vezzano Ligure SP 8 7356 34433
Riccò del Golfo di Spezia SP 8 3698 38131
Podenzana MS 8 2180 40311
Rocchetta di Vara SP 9 703 41014
Pignone SP 10 565 41579
Borghetto di Vara SP 10 938 42517
Tresana MS 10 2044 44561
Brugnato SP 10 1270 45831
Aulla MS 10 11263 57094
La Spezia SP 11 93959 151053
Arcola SP 11 10607 161660
Zignago SP 11 532 162192
Villafranca in Lunigiana MS 13 4770 166962
Sarzana SP 14 21976 188938
Riomaggiore SP 14 1576 190514
Mulazzo MS 14 2424 192938
Vernazza SP 15 848 193786
Carrodano SP 15 503 194289
Lerici SP 15 10228 204517
Monterosso al Mare SP 16 1464 205981
Fosdinovo MS 16 4883 210864
Portovenere SP 16 3630 214494
Filattiera MS 16 2309 216803
Sesta Godano SP 17 1377 218180
Licciana Nardi MS 17 4949 223129
Bagnone MS 18 1887 225016
Zeri MS 18 1094 226110
Ameglia SP 18 4365 230475
Levanto SP 18 5499 235974
Castelnuovo Magra SP 18 8415 244389
Pontremoli MS 20 7357 251746
Carro SP 20 545 252291

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km N of La Spezia (93959 inhabitants)
25 Km NW of Carrara (63133 inhabitants)
30 Km NW of Massa (69479 inhabitants)
50 Km NW of Viareggio (62467 inhabitants)
66 Km NW of Lucca (89046 inhabitants)
70 Km NW of Pisa (89158 inhabitants)
76 Km E of Genova (586655 inhabitants)
77 Km SW of Parma (192836 inhabitants)
82 Km NW of Livorno (159219 inhabitants)
84 Km SW of Reggio nell'Emilia (171345 inhabitants)
91 Km W of Pistoia (90315 inhabitants)
95 Km S of Piacenza (102191 inhabitants)
99 Km W of Modena (184973 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
Reviewed
Rev100 		ML 0.9 2021-10-01
17:17:09		 44.2037 9.8397 11 2021-10-01
17:24:21		 Sala Sismica INGV-Roma 96110631
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-01 17:17:09 ± 0.15
Latitude 44.2037 ± 0.0099
Longitude 9.8397 ± 0.0125
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96110631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1160
Semi-minor axis of confidence ellipse (meter) 900
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 39
Circular confidence region, given by single value of horizontal uncertainty (meter) 1160.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.15378
Epicentral distance of station farthest from the epicenter (degree) 0.32915
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 96110631
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-01 17:24:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MSSA.HHZ. 2021-10-01T17:17:18.70 0.6 undecidable manual S 296 28.4493 50 -0.47 48
GU.EQUI.HHZ. 2021-10-01T17:17:17.76 0.6 undecidable manual S 99 25.2525 50 -0.55 47
IV.PLMA.HHZ. 2021-10-01T17:17:16.07 0.6 undecidable manual S 176 17.0718 122 0 54
GU.GRAM.HHZ. 2021-10-01T17:17:16.30 0.1 undecidable manual P 29 36.5412 50 0.17 100
IV.MSSA.HHZ. 2021-10-01T17:17:15.06 0.3 negative manual P 296 28.4493 50 0.16 76
GU.EQUI.HHZ. 2021-10-01T17:17:14.62 0.6 positive manual P 99 25.2525 50 0.22 50
IV.PLMA.HHZ. 2021-10-01T17:17:13.41 1.0 undecidable manual P 176 17.0718 122 0.31 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PLMA.HHE. ML:0.8 0.00005448174 0.1024 AML other m 2021-10-01T17:17:16.13
IV.PLMA.HHN. ML:1.0 0.00008868490000000002 0.0768 AML other m 2021-10-01T17:17:16.33
IV.MSSA.HHE. ML:1.7 0.000242 0.1 AML other m 2021-10-01T17:17:19.21
IV.MSSA.HHN. ML:1.6 0.00020150000000000002 0.1 AML other m 2021-10-01T17:17:19.19
GU.EQUI.HHE. ML:0.7 0.00002898494 4.9408 AML other m 2021-10-01T17:17:18.22
GU.EQUI.HHN. ML:0.5 0.000019646545000000002 0.1408 AML other m 2021-10-01T17:17:18.53
GU.GRAM.HHE. ML:0.8 0.000023512434999999998 0.2432 AML other m 2021-10-01T17:17:22.29
GU.GRAM.HHN. ML:0.8 0.000026624975 0.128 AML other m 2021-10-01T17:17:22.80
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