Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 26-10-2021 and time 15:17:01 (UTC) in region 2 km SW Villafranca in Lunigiana (MS)

A magnitude ML 1.9 earthquake occured in region: 2 km SW Villafranca in Lunigiana (MS), on

  • 26-10-2021 15:17:01 (UTC)
  • 26-10-2021 17:17:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2760, 9.9450 at 6 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Villafranca in Lunigiana MS 2 4770 4770
Tresana MS 4 2044 6814
Mulazzo MS 6 2424 9238
Bagnone MS 6 1887 11125
Filattiera MS 6 2309 13434
Aulla MS 8 11263 24697
Licciana Nardi MS 8 4949 29646
Podenzana MS 8 2180 31826
Calice al Cornoviglio SP 9 1138 32964
Bolano SP 10 7813 40777
Pontremoli MS 12 7357 48134
Santo Stefano di Magra SP 13 9360 57494
Follo SP 14 6337 63831
Fivizzano MS 15 7925 71756
Rocchetta di Vara SP 15 703 72459
Comano MS 15 714 73173
Vezzano Ligure SP 16 7356 80529
Zignago SP 16 532 81061
Beverino SP 17 2429 83490
Zeri MS 17 1094 84584
Fosdinovo MS 17 4883 89467
Brugnato SP 18 1270 90737
Sarzana SP 18 21976 112713
Arcola SP 18 10607 123320
Borghetto di Vara SP 19 938 124258
Riccò del Golfo di Spezia SP 20 3698 127956

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NE of La Spezia (93959 inhabitants)
25 Km NW of Carrara (63133 inhabitants)
31 Km NW of Massa (69479 inhabitants)
52 Km NW of Viareggio (62467 inhabitants)
65 Km NW of Lucca (89046 inhabitants)
66 Km SW of Parma (192836 inhabitants)
72 Km SW of Reggio nell'Emilia (171345 inhabitants)
72 Km NW of Pisa (89158 inhabitants)
82 Km E of Genova (586655 inhabitants)
86 Km NW of Livorno (159219 inhabitants)
87 Km W of Pistoia (90315 inhabitants)
88 Km W of Modena (184973 inhabitants)
89 Km S of Piacenza (102191 inhabitants)
94 Km SW of Carpi (70699 inhabitants)
96 Km S of Cremona (71901 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 1.9 2021-10-26
15:17:01		 44.2762 9.9448 6 2022-03-30
13:04:40		 Bollettino Sismico Italiano INGV 101610771
Reviewed
Rev100 		ML 1.9 2021-10-26
15:17:01		 44.2792 9.9423 6 2021-10-26
15:29:10		 Sala Sismica INGV-Roma 97004491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-26 15:17:01 ± 0.09
Latitude 44.2762 ± 0.0054
Longitude 9.9448 ± 0.0063
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 101610771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 617
Semi-minor axis of confidence ellipse (meter) 74
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 22
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 42
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.03332
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 97004491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-26 15:29:10

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 101610771
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-02 15:14:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CR.ZAG.BHZ. 2021-10-26T15:18:47.18 3.0 undecidable manual Sn -6.85 0
IV.JOPP.HHZ. 2021-10-26T15:18:47.03 3.0 undecidable manual Pg 10.03 0
IV.VAGA.HHZ. 2021-10-26T15:18:40.84 3.0 undecidable manual Sg -1.55 0
SI.ROSI.HHZ. 2021-10-26T15:18:20.67 3.0 undecidable manual Sg 3.48 0
IV.VIVA.HHZ. 2021-10-26T15:18:17.74 3.0 undecidable manual Sg -0.3 0
IV.ORI.HHZ. 2021-10-26T15:18:14.83 3.0 positive manual Pn -9.99 0
CH.BERNI.HHZ. 2021-10-26T15:18:11.45 3.0 undecidable manual Sg 9.91 0
IV.COLB.HHZ. 2021-10-26T15:18:06.53 3.0 undecidable manual Pg 4.69 0
OT.OT17.EHZ. 2021-10-26T15:18:03.75 3.0 positive manual Pg 0.33 0
RF.GEPF.HHZ. 2021-10-26T15:17:47.77 3.0 undecidable manual Pg 4.65 0
SI.ROSI.HHZ. 2021-10-26T15:17:45.84 3.0 negative manual Pg 3.48 0
IV.VOBA.EHZ. 2021-10-26T15:17:45.15 3.0 undecidable manual Sg 2.1 0
IV.PE3.EHZ. 2021-10-26T15:17:33.63 3.0 undecidable manual Sn -9.99 0
CH.BERNI.HHZ. 2021-10-26T15:17:32.67 3.0 positive manual Pg -0.9 0
IV.PII.HHZ. 2021-10-26T15:17:24.89 0.6 undecidable manual S 143 76.9674 50 -0.44 42
GU.POPM.HHZ. 2021-10-26T15:17:23.64 0.6 undecidable manual S 111 69.4749 50 0.29 44
GU.PCP.HHZ. 2021-10-26T15:17:21.40 0.3 undecidable manual P 285 114.6963 50 0.44 58
GU.GORR.HHN. 2021-10-26T15:17:21.11 0.6 undecidable manual S 306 63.3921 50 -0.6 41
IV.CRMI.HHZ. 2021-10-26T15:17:19.33 0.6 undecidable manual P 123 98.2239 50 0.91 34
IV.BDI.HHZ. 2021-10-26T15:17:19.76 0.6 undecidable manual S 114 56.8986 50 -0.22 46
GU.GSCL.HHZ. 2021-10-26T15:17:18.17 0.6 undecidable manual S 81 51.7038 50 -0.42 44
IV.VOBA.EHZ. 2021-10-26T15:17:17.80 3.0 negative manual Pn -5.38 0
GU.RNCA.HHZ. 2021-10-26T15:17:16.49 0.6 undecidable manual P 286 81.7515 50 0.62 39
IV.PII.HHZ. 2021-10-26T15:17:14.88 0.3 undecidable manual P 143 76.9674 50 -0.26 65
GU.POPM.HHZ. 2021-10-26T15:17:14.48 0.3 undecidable manual P 111 69.4749 50 0.49 63
GU.SARM.EHN. 2021-10-26T15:17:13.74 0.6 undecidable manual S 106 37.629 99 -0.7 41
GU.GORR.HHN. 2021-10-26T15:17:12.88 0.3 undecidable manual P 306 63.3921 50 -0.17 68
IV.MSSA.HHZ. 2021-10-26T15:17:12.91 0.6 undecidable manual S 278 34.2435 100 -0.36 46
GU.MAIM.HHZ. 2021-10-26T15:17:12.16 0.3 undecidable manual P 133 59.2962 50 -0.26 68
GU.GSCL.HHZ. 2021-10-26T15:17:11.41 0.3 undecidable manual P 81 51.7038 50 0.16 70
GU.CARD.HHZ. 2021-10-26T15:17:11.90 0.3 undecidable manual P 123 50.9157 50 0.77 59
IV.BDI.HHZ. 2021-10-26T15:17:11.73 0.3 undecidable manual P 114 56.8986 50 -0.32 67
IV.PLMA.HHZ. 2021-10-26T15:17:10.27 0.3 undecidable manual S 196 26.1516 103 -0.24 72
GU.GRAM.HHZ. 2021-10-26T15:17:10.13 0.3 undecidable manual S 22 25.6521 103 -0.21 73
GU.EQUI.HHZ. 2021-10-26T15:17:08.17 0.6 undecidable manual S 126 20.5683 106 -0.47 46
IV.MSSA.HHZ. 2021-10-26T15:17:08.20 0.1 undecidable manual P 278 34.2435 100 0.03 99
GU.SARM.EHN. 2021-10-26T15:17:08.43 0.1 undecidable manual P 106 37.629 99 -0.41 91
GU.FIVI.HNZ. 2021-10-26T15:17:07.30 0.3 undecidable manual S 106 15.0738 112 0.48 70
GU.GRAM.HHZ. 2021-10-26T15:17:06.56 0.1 negative manual P 22 25.6521 103 0.08 99
IV.PLMA.HHZ. 2021-10-26T15:17:06.75 0.1 undecidable manual P 196 26.1516 103 0.17 97
GU.EQUI.HHZ. 2021-10-26T15:17:05.59 0.1 undecidable manual P 126 20.5683 106 0.09 100
GU.FIVI.HNZ. 2021-10-26T15:17:04.83 0.3 undecidable manual P 106 15.0738 112 0.38 71
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.FIVI.HNN. ML:2.1 0.00146 0.18 AML other m 2021-10-26T15:17:08.01
GU.FIVI.HNE. ML:2.0 0.0012250000000000002 0.66 AML other m 2021-10-26T15:17:08.78
GU.EQUI.HHE. ML:1.5 0.000253 1.32 AML other m 2021-10-26T15:17:09.77
IV.PLMA.HHN. ML:2.0 0.0005560000000000001 0.34 AML other m 2021-10-26T15:17:10.44
GU.GRAM.HHE. ML:2.2 0.0009930000000000002 0.22 AML other m 2021-10-26T15:17:10.44
IV.PLMA.HHE. ML:1.8 0.000411 0.26 AML other m 2021-10-26T15:17:10.49
GU.EQUI.HHN. ML:1.4 0.000177 1.5 AML other m 2021-10-26T15:17:12.16
GU.GRAM.HHN. ML:2.1 0.0008155 0.28 AML other m 2021-10-26T15:17:12.72
IV.MSSA.HHN. ML:2.6 0.0015699999999999998 0.28 AML other m 2021-10-26T15:17:13.27
IV.MSSA.HHE. ML:2.5 0.0015051945 0.0896 AML other m 2021-10-26T15:17:16.60
GU.GSCL.HHN. ML:2.0 0.000225 0.36 AML other m 2021-10-26T15:17:18.81
GU.GSCL.HHE. ML:2.0 0.0002235 0.24 AML other m 2021-10-26T15:17:18.85
GU.MAIM.HHE. ML:1.2 0.0000368 1.06 AML other m 2021-10-26T15:17:20.69
IV.BDI.HHN. ML:1.6 0.0000783 0.28 AML other m 2021-10-26T15:17:21.18
IV.BDI.HHE. ML:1.4 0.0000625 1.52 AML other m 2021-10-26T15:17:21.19
GU.CARD.HHE. ML:1.8 0.000152 0.78 AML other m 2021-10-26T15:17:24.41
GU.POPM.HHN. ML:1.8 0.0001115 0.2 AML other m 2021-10-26T15:17:24.12
GU.CARD.HHN. ML:1.8 0.0001437966 0.1408 AML other m 2021-10-26T15:17:24.43
GU.MAIM.HHN. ML:1.4 0.0000513 1.44 AML other m 2021-10-26T15:17:24.78
GU.POPM.HHE. ML:1.8 0.0001027 0.16 AML other m 2021-10-26T15:17:24.80
IV.PII.HHE. ML:1.9 0.00010750000000000001 1.02 AML other m 2021-10-26T15:17:27.92
IV.PII.HHN. ML:1.9 0.000126 0.16 AML other m 2021-10-26T15:17:27.79
GU.RNCA.HHE. ML:2.0 0.0001245 0.22 AML other m 2021-10-26T15:17:29.67
GU.RNCA.HHN. ML:1.8 0.00008035 0.48 AML other m 2021-10-26T15:17:31.00
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