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) 44.279, 9.942 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
Villafranca in Lunigiana MS 2 4770 4770
Tresana MS 5 2044 6814
Mulazzo MS 6 2424 9238
Bagnone MS 6 1887 11125
Filattiera MS 6 2309 13434
Licciana Nardi MS 8 4949 18383
Podenzana MS 8 2180 20563
Aulla MS 8 11263 31826
Calice al Cornoviglio SP 9 1138 32964
Bolano SP 11 7813 40777
Pontremoli MS 12 7357 48134
Santo Stefano di Magra SP 13 9360 57494
Follo SP 14 6337 63831
Rocchetta di Vara SP 15 703 64534
Fivizzano MS 15 7925 72459
Zignago SP 16 532 72991
Comano MS 16 714 73705
Vezzano Ligure SP 16 7356 81061
Zeri MS 16 1094 82155
Beverino SP 17 2429 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)
26 Km NW of Carrara (63133 inhabitants)
31 Km NW of Massa (69479 inhabitants)
52 Km NW of Viareggio (62467 inhabitants)
66 Km SW of Parma (192836 inhabitants)
66 Km NW of Lucca (89046 inhabitants)
72 Km SW of Reggio nell'Emilia (171345 inhabitants)
73 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)
88 Km S of Piacenza (102191 inhabitants)
94 Km SW of Carpi (70699 inhabitants)
95 Km S of Cremona (71901 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 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 ± 0.32
Latitude 44.2792 ± 0.0081
Longitude 9.9423 ± 0.0226
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97004491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1847
Semi-minor axis of confidence ellipse (meter) 614
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 73
Circular confidence region, given by single value of horizontal uncertainty (meter) 1850
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 240
Number of associated phases, regardless of their use for origin computation 42
Number of defining phases 17
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
Epicentral distance of station farthest from the epicenter (degree) 0.88853
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 9
Magnitude 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
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance 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
IV.VOBA.EHZ. 2021-10-26T15:17:45.15 3.0 undecidable manual Sg 2.1 0
SI.ROSI.HHZ. 2021-10-26T15:17:45.84 3.0 negative manual Pg 3.48 0
IV.SARZ.HHZ. 2021-10-26T15:17:42.74 3.0 undecidable manual Sg 8.86 0
IV.PE3.EHZ. 2021-10-26T15:17:33.63 3.0 undecidable manual Sn -9.99 0
IV.CRMI.HHZ. 2021-10-26T15:17:32.00 0.6 undecidable manual S 123 0.8885 50 0.8 35
CH.BERNI.HHZ. 2021-10-26T15:17:32.67 3.0 positive manual Pg -0.9 0
GU.CANO.HHZ. 2021-10-26T15:17:25.38 3.0 positive manual Pg 4.53 0
IV.PII.HHZ. 2021-10-26T15:17:24.89 0.6 undecidable manual S 143 0.697 50 -0.64 39
GU.POPM.HHZ. 2021-10-26T15:17:23.64 0.6 undecidable manual S 112 0.6295 50 0.12 45
GU.PCP.HHZ. 2021-10-26T15:17:21.29 3.0 undecidable manual Pg 2.42 0
IV.BDI.HHZ. 2021-10-26T15:17:19.92 0.6 undecidable manual S 115 0.5162 50 -0.25 45
IV.CRMI.HHZ. 2021-10-26T15:17:19.21 0.1 undecidable manual P 123 0.8885 50 0.63 75
IV.SARZ.HHZ. 2021-10-26T15:17:19.77 3.0 undecidable manual Pg 1.74 0
GU.GSCL.HHZ. 2021-10-26T15:17:18.27 0.6 undecidable manual S 81 0.4676 50 -0.46 43
IV.VOBA.EHZ. 2021-10-26T15:17:17.80 3.0 negative manual Pn -5.38 0
GU.POPM.HHZ. 2021-10-26T15:17:14.48 0.3 undecidable manual P 112 0.6295 50 0.33 65
IV.PII.HHZ. 2021-10-26T15:17:14.88 0.3 undecidable manual P 143 0.697 50 -0.43 62
GU.RNCA.HHZ. 2021-10-26T15:17:13.01 3.0 positive manual Pn -1.82 0
GU.CARD.HHZ. 2021-10-26T15:17:12.12 3.0 undecidable manual Sn 1.1 0
GU.MAIM.HHZ. 2021-10-26T15:17:12.90 0.6 undecidable manual P 133 0.5378 50 0.31 44
IV.BDI.HHZ. 2021-10-26T15:17:11.73 0.3 undecidable manual P 115 0.5162 50 -0.48 64
GU.GSCL.HHZ. 2021-10-26T15:17:11.53 0.3 undecidable manual P 81 0.4676 50 0.15 69
GU.GRAM.HHZ. 2021-10-26T15:17:10.22 0.3 undecidable manual S 23 0.2284 104 -0.17 72
IV.MSSA.HHZ. 2021-10-26T15:17:08.21 3.0 negative manual P -0.74 0
GU.EQUI.HHZ. 2021-10-26T15:17:08.17 0.6 undecidable manual S 127 0.1889 106 -0.74 41
GU.FIVI.HNZ. 2021-10-26T15:17:07.39 0.3 undecidable manual S 107 0.1385 112 0.32 71
GU.GRAM.HHZ. 2021-10-26T15:17:06.56 0.1 negative manual P 23 0.2284 104 -0.01 100
IV.PLMA.HHZ. 2021-10-26T15:17:06.72 3.0 undecidable manual Pg 1.37 0
GU.EQUI.HHZ. 2021-10-26T15:17:05.62 0.3 negative manual P 127 0.1889 106 -0.09 74
GU.FIVI.HNZ. 2021-10-26T15:17:04.83 0.3 undecidable manual P 107 0.1385 112 0.18 74
IT.FIE.HGZ. 2021-10-26T15:17:03.26 3.0 undecidable manual P -9.96 0
GU.CARD.HHZ. 2021-10-26T15:17:01.97 3.0 undecidable manual P -3.22 0
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:2.1 0.001225 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 0.000556 0.34 AML other m 2021-10-26T15:17:10.44
GU.GRAM.HHE. ML:2.2 0.000993 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 0.00157 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 0.000225 0.36 AML other m 2021-10-26T15:17:18.81
GU.GSCL.HHE. ML:2 0.0002235 0.24 AML other m 2021-10-26T15:17:18.85
GU.MAIM.HHE. ML:1.2 3.68E-5 1.06 AML other m 2021-10-26T15:17:20.69
IV.BDI.HHN. ML:1.6 7.83E-5 0.28 AML other m 2021-10-26T15:17:21.18
IV.BDI.HHE. ML:1.4 6.25E-5 1.52 AML other m 2021-10-26T15:17:21.19
GU.CARD.HHN. ML:1.8 0.0001437966 0.1408 AML other m 2021-10-26T15:17:24.43
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.MAIM.HHN. ML:1.4 5.13E-5 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 0.0001075 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 0.0001245 0.22 AML other m 2021-10-26T15:17:29.67
GU.RNCA.HHN. ML:1.8 8.035E-5 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