Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 30-12-2021 and time 06:51:04 (UTC) in region 4 km NE Balme (TO)

A magnitude ML 1.9 earthquake occured in region: 4 km NE Balme (TO), on

  • 30-12-2021 06:51:04 (UTC)
  • 30-12-2021 07:51:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 45.3350, 7.2380 at 11 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
Balme TO 4 115 115
Groscavallo TO 5 204 319
Ala di Stura TO 6 469 788
Chialamberto TO 9 345 1133
Ceresole Reale TO 11 156 1289
Usseglio TO 11 209 1498
Cantoira TO 11 564 2062
Ceres TO 12 1065 3127
Lemie TO 13 179 3306
Mezzenile TO 13 786 4092
Pessinetto TO 14 606 4698
Noasca TO 15 137 4835
Viù TO 15 1051 5886
Monastero di Lanzo TO 16 350 6236
Traves TO 17 518 6754
Coassolo Torinese TO 18 1547 8301
Germagnano TO 20 1201 9502
Locana TO 20 1498 11000
Lanzo Torinese TO 20 5086 16086

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km NW of Torino (890529 inhabitants)
51 Km NW of Moncalieri (57294 inhabitants)
90 Km NW of Asti (76202 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 2021-12-30
06:51:04		 45.3347 7.2383 11 2022-03-30
13:04:25		 Bollettino Sismico Italiano INGV 99228251
Reviewed
Rev100 		ML 1.9 2021-12-30
06:51:04		 45.3377 7.2747 9 2021-12-30
06:55:39		 Sala Sismica INGV-Roma 99140761
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-30 06:51:04 ± 0.13
Latitude 45.3347 ± 0.0045
Longitude 7.2383 ± 0.0179
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99228251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1440
Semi-minor axis of confidence ellipse (meter) 444
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 269
Circular confidence region, given by single value of horizontal uncertainty (meter) 1440.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0.18706
Epicentral distance of station farthest from the epicenter (degree) 1.17272
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 99228251
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-03 11:11:59

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 99140761
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-30 06:55:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CH.DIX.HHZ. 2021-12-30T06:51:28.11 0.6 undecidable manual S 9 83.7495 90 -1 33
GU.GBOS.HHZ. 2021-12-30T06:51:26.12 0.3 undecidable manual P 158 130.1697 90 0.34 59
RD.ORIF.BHZ. 2021-12-30T06:51:24.68 0.3 undecidable manual P 247 115.8951 90 1.1 45
GU.BHB.HHZ. 2021-12-30T06:51:21.12 0.6 undecidable manual S 178 55.4001 90 -0.43 46
GU.RRL.HHE. 2021-12-30T06:51:21.35 0.6 undecidable manual S 218 57.7977 90 -0.82 40
GU.REMY.HHE. 2021-12-30T06:51:21.09 0.6 undecidable manual S 354 56.1993 90 -0.66 40
CH.MMK.HHZ. 2021-12-30T06:51:21.28 0.3 undecidable manual P 35 97.3248 90 0.57 62
MN.BNI.HHZ. 2021-12-30T06:51:20.41 0.6 undecidable manual S 235 53.9016 90 -0.72 42
GU.PZZ.HHZ. 2021-12-30T06:51:20.26 0.3 undecidable manual P 186 92.3409 90 0.31 64
IV.MRGE.HHZ. 2021-12-30T06:51:19.38 0.3 undecidable manual S 344 50.2164 90 -0.77 59
CH.DIX.HHZ. 2021-12-30T06:51:18.92 0.3 undecidable manual P 9 83.7495 90 0.3 67
GU.TRAV.HHZ. 2021-12-30T06:51:17.79 0.6 undecidable manual S 63 44.1225 90 -0.76 39
GU.CIRO.HHZ. 2021-12-30T06:51:16.38 0.6 undecidable manual S 41 39.2274 90 -0.84 38
IV.MONC.HHN. 2021-12-30T06:51:15.79 1.0 undecidable manual P 118 61.0944 90 0.65 21
GU.REMY.HHE. 2021-12-30T06:51:14.81 0.1 undecidable manual P 354 56.1993 90 0.44 91
GU.BHB.HHZ. 2021-12-30T06:51:14.59 0.1 undecidable manual P 178 55.4001 90 0.33 92
GU.RRL.HHE. 2021-12-30T06:51:14.69 0.3 undecidable manual P 218 57.7977 90 0.07 72
MN.BNI.HHZ. 2021-12-30T06:51:13.94 0.1 undecidable manual P 235 53.9016 90 -0.08 98
IV.MRGE.HHZ. 2021-12-30T06:51:13.76 0.1 positive manual P 344 50.2164 90 0.31 94
GU.TRAV.HHZ. 2021-12-30T06:51:12.56 0.1 negative manual P 63 44.1225 90 0.04 100
GU.RSP.HHZ. 2021-12-30T06:51:11.20 0.6 undecidable manual S 174 20.7681 91 -1.1 37
GU.CIRO.HHZ. 2021-12-30T06:51:11.91 0.1 negative manual P 41 39.2274 90 0.15 100
GU.RSP.HHZ. 2021-12-30T06:51:08.64 0.1 positive manual P 174 20.7681 91 -0.28 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.RSP.HNE. ML:1.9 0.0004935 0.46 AML other m 2021-12-30T06:51:11.63
GU.RSP.HHE. ML:1.9 0.0006154999999999999 0.46 AML other m 2021-12-30T06:51:11.63
GU.RSP.HHN. ML:1.9 0.000499 1.5 AML other m 2021-12-30T06:51:11.76
GU.RSP.HNN. ML:1.8 0.0004095 1.5 AML other m 2021-12-30T06:51:11.76
GU.CIRO.HHE. ML:1.6 0.00012495 1.7 AML other m 2021-12-30T06:51:17.93
GU.CIRO.HHN. ML:1.4 0.0000949 1.18 AML other m 2021-12-30T06:51:17.73
IV.MRGE.HHE. ML:2.0 0.0002915 0.18 AML other m 2021-12-30T06:51:19.57
GU.TRAV.HHE. ML:1.9 0.0002575 0.24 AML other m 2021-12-30T06:51:20.21
IV.MRGE.HHN. ML:2.3 0.00048650000000000006 0.56 AML other m 2021-12-30T06:51:20.23
GU.TRAV.HHN. ML:1.9 0.00023249999999999999 0.22 AML other m 2021-12-30T06:51:20.51
GU.BHB.HHE. ML:1.8 0.000151 1.56 AML other m 2021-12-30T06:51:21.05
GU.BHB.HNE. ML:1.8 0.0001555 0.42 AML other m 2021-12-30T06:51:22.05
MN.BNI.HHE. ML:1.5 0.0000807 0.56 AML other m 2021-12-30T06:51:22.15
GU.BHB.HNN. ML:1.9 0.0001945 0.74 AML other m 2021-12-30T06:51:22.47
GU.BHB.HHN. ML:1.9 0.00019350000000000001 0.74 AML other m 2021-12-30T06:51:22.10
MN.BNI.HHN. ML:1.6 0.00009570000000000001 0.54 AML other m 2021-12-30T06:51:24.29
GU.PZZ.HHN. ML:2.3 0.000203 1 AML other m 2021-12-30T06:51:33.77
GU.PZZ.HHE. ML:2.3 0.000238 0.66 AML other m 2021-12-30T06:51:34.34
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