Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 18-12-2021 and time 22:26:23 (UTC) in region 7 km SW Ventasso (RE)

A magnitude ML 1.4 earthquake occured in region: 7 km SW Ventasso (RE), on

  • 18-12-2021 22:26:23 (UTC)
  • 18-12-2021 23:26:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.3120, 10.2900 at 16 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
Ventasso RE 7 4295 4295
Sillano Giuncugnano LU 10 1085 5380
Comano MS 12 714 6094
Piazza al Serchio LU 14 2367 8461
Casola in Lunigiana MS 15 988 9449
Villa Minozzo RE 15 3750 13199
Fivizzano MS 16 7925 21124
Palanzano PR 16 1142 22266
San Romano in Garfagnana LU 17 1410 23676
Castelnovo ne' Monti RE 17 10465 34141
Minucciano LU 17 2102 36243
Monchio delle Corti PR 17 933 37176
Camporgiano LU 17 2176 39352
Villa Collemandina LU 19 1334 40686
Vetto RE 20 1860 42546

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NE of Carrara (63133 inhabitants)
33 Km NE of Massa (69479 inhabitants)
43 Km NE of La Spezia (93959 inhabitants)
50 Km N of Viareggio (62467 inhabitants)
51 Km SW of Reggio nell'Emilia (171345 inhabitants)
55 Km S of Parma (192836 inhabitants)
55 Km NW of Lucca (89046 inhabitants)
63 Km SW of Modena (184973 inhabitants)
65 Km NW of Pistoia (90315 inhabitants)
67 Km N of Pisa (89158 inhabitants)
71 Km SW of Carpi (70699 inhabitants)
80 Km NW of Prato (191150 inhabitants)
84 Km N of Livorno (159219 inhabitants)
86 Km W of Bologna (386663 inhabitants)
94 Km S of Cremona (71901 inhabitants)
94 Km NW of Scandicci (50609 inhabitants)
95 Km SE of Piacenza (102191 inhabitants)
98 Km NW of Firenze (382808 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 1.4 2021-12-18
22:26:23		 44.3123 10.2898 16 2022-03-30
13:04:26		 Bollettino Sismico Italiano INGV 99324301
Reviewed
Rev100 		ML 1.3 2021-12-18
22:26:23		 44.3232 10.2958 10 2021-12-18
22:31:45		 Sala Sismica INGV-Roma 98702241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-18 22:26:23 ± 0.06
Latitude 44.3123 ± 0.0027
Longitude 10.2898 ± 0.0038
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99324301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 340
Semi-minor axis of confidence ellipse (meter) 23
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 106
Circular confidence region, given by single value of horizontal uncertainty (meter) 340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.61334
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 98702241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-18 22:31:45

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 99324301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-04 14:59:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GRIS.EHZ. 2021-12-18T22:28:13.05 3.0 undecidable manual Pg 23.889999 0
IV.PTRJ.HHZ. 2021-12-18T22:28:10.53 3.0 undecidable manual Sn -3.82 0
IV.IVGP.HHZ. 2021-12-18T22:28:00.90 3.0 undecidable manual Pn 0.89 0
IV.POFI.HHZ. 2021-12-18T22:27:56.87 3.0 undecidable manual Sn -1.47 0
IV.MCRV.HHZ. 2021-12-18T22:27:48.97 3.0 undecidable manual Pg 15.55 0
IX.SRN3.HHZ.02 2021-12-18T22:27:44.16 3.0 undecidable manual Pn 5.67 0
IV.MC2.EHZ. 2021-12-18T22:27:34.29 3.0 undecidable manual Sn 4.37 0
IV.VITU.HNZ. 2021-12-18T22:27:27.54 3.0 undecidable manual Pn 1.92 0
OX.PLRO.HHZ. 2021-12-18T22:27:25.74 3.0 undecidable manual Sn -0.37 0
IV.ARVD.HHZ. 2021-12-18T22:26:57.28 3.0 undecidable manual Pg 6.41 0
MN.BNI.HHZ. 2021-12-18T22:26:56.95 3.0 undecidable manual Pn -1.74 0
IV.APEC.HHZ. 2021-12-18T22:26:46.24 3.0 undecidable manual Pn -0.11 0
IV.PLMA.HHZ. 2021-12-18T22:26:37.60 0.3 undecidable manual S 230 45.3213 98 -0.28 67
IV.PII.HHZ. 2021-12-18T22:26:35.18 1.0 positive manual P 164 68.0763 95 -0.02 23
IV.BDI.HHZ. 2021-12-18T22:26:35.56 0.3 undecidable manual S 139 36.8298 100 -0.1 72
IV.IMOL.HNZ. 2021-12-18T22:26:34.92 3.0 negative manual P 0.48 0
IV.MSSA.HHZ. 2021-12-18T22:26:34.25 0.6 undecidable manual P 271 61.2942 95 0.09 46
GU.GRAM.HHZ. 2021-12-18T22:26:33.04 0.6 undecidable manual S 318 26.6511 107 0.04 49
GU.GSCL.HHZ. 2021-12-18T22:26:32.17 0.3 undecidable manual S 80 24.0537 110 -0.18 72
GU.MAIM.HHZ. 2021-12-18T22:26:32.09 0.6 undecidable manual P 160 47.1195 97 0.11 46
IV.PLMA.HHZ. 2021-12-18T22:26:31.68 0.6 undecidable manual P 230 45.3213 98 -0.02 47
GU.EQUI.HHZ. 2021-12-18T22:26:31.13 0.3 undecidable manual S 214 19.5693 116 -0.11 73
GU.CARD.HHZ. 2021-12-18T22:26:30.35 0.1 undecidable manual P 154 35.2425 101 0.18 94
IV.ERBM.EHE. 2021-12-18T22:26:30.31 0.6 undecidable manual S 39 15.3735 125 0.03 50
IV.BDI.HHZ. 2021-12-18T22:26:30.69 0.3 undecidable manual P 139 36.8298 100 0.27 69
GU.FIVI.HNE. 2021-12-18T22:26:30.61 0.6 undecidable manual S 238 15.2736 125 0.35 47
IV.NEVI.HNN. 2021-12-18T22:26:29.49 0.6 undecidable manual P 4 30.1476 104 0.08 48
GU.GSCL.HHZ. 2021-12-18T22:26:28.39 0.6 undecidable manual P 80 24.0537 110 -0.12 48
GU.GRAM.HHZ. 2021-12-18T22:26:28.88 0.6 undecidable manual P 318 26.6511 107 0 49
GU.FIVI.HNE. 2021-12-18T22:26:27.27 0.1 undecidable manual P 238 15.2736 125 -0.03 100
IV.ERBM.EHE. 2021-12-18T22:26:27.21 0.1 undecidable manual P 39 15.3735 125 -0.1 98
GU.EQUI.HHZ. 2021-12-18T22:26:27.69 0.6 undecidable manual P 214 19.5693 116 -0.18 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GSCL.HHN. ML:1.3 0.0001175 0.8 AML other m 2021-12-18T22:26:32.88
GU.GSCL.HHE. ML:1.4 0.0001575 0.22 AML other m 2021-12-18T22:26:32.91
IV.BDI.HHE. ML:1.0 0.00004055 1.48 AML other m 2021-12-18T22:26:36.82
IV.BDI.HHN. ML:1.1 0.000045950000000000006 1.4 AML other m 2021-12-18T22:26:37.13
IV.PII.HHN. ML:1.7 0.00008549999999999999 0.62 AML other m 2021-12-18T22:26:46.39
IV.PII.HHE. ML:1.5 0.00005735 1.02 AML other m 2021-12-18T22:26:46.40
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