Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 23-01-2022 and time 18:50:43 (Italy) in region 1 km E Pratovecchio Stia (AR)

A magnitude ML 1.1 earthquake occured in region: 1 km E Pratovecchio Stia (AR), on

  • 23-01-2022 17:50:43 (UTC)
  • 23-01-2022 18:50:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.7870, 11.7390 at 9 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
Pratovecchio Stia AR 1 5845 5845
Castel San Niccolò AR 6 2707 8552
Poppi AR 7 6160 14712
Montemignaio AR 11 566 15278
Ortignano Raggiolo AR 12 878 16156
Bibbiena AR 12 12241 28397
Londa FI 16 1840 30237
Castel Focognano AR 17 3149 33386
Chitignano AR 18 899 34285
San Godenzo FI 18 1167 35452
Chiusi della Verna AR 19 2023 37475
Pelago FI 19 7660 45135
Reggello FI 20 16290 61425

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km NW of Arezzo (99543 inhabitants)
39 Km E of Firenze (382808 inhabitants)
45 Km E of Scandicci (50609 inhabitants)
53 Km E of Prato (191150 inhabitants)
54 Km SW of Forlì (117913 inhabitants)
56 Km SW of Cesena (96758 inhabitants)
57 Km S of Faenza (58541 inhabitants)
61 Km NE of Siena (53903 inhabitants)
63 Km S of Imola (69797 inhabitants)
68 Km E of Pistoia (90315 inhabitants)
73 Km W of Rimini (147750 inhabitants)
79 Km SW of Ravenna (159116 inhabitants)
85 Km SE of Bologna (386663 inhabitants)
92 Km NW of Perugia (166134 inhabitants)
95 Km W of Pesaro (94582 inhabitants)
99 Km E of Lucca (89046 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 1.1 2022-01-23
17:50:43		 43.787 11.7387 9 2022-01-23
17:59:38		 Sala Sismica INGV-Roma 100099781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-01-23 17:50:43 ± 0.1
Latitude 43.7870 ± 0.0081
Longitude 11.7387 ± 0.0075
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 100099781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 883
Semi-minor axis of confidence ellipse (meter) 479
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 26
Circular confidence region, given by single value of horizontal uncertainty (meter) 880.0
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 19
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.54769
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 100099781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-01-23 17:59:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRMI.HHZ. 2022-01-23T17:51:03.16 0.3 undecidable manual S 271 60.7947 50 0.42 63
IV.MPPT.EHZ. 2022-01-23T17:51:01.15 0.3 undecidable manual S 290 55.2003 50 -0.1 68
IV.CAFI.HHZ. 2022-01-23T17:51:00.72 3.0 undecidable manual S 0
IV.OSSC.HHZ. 2022-01-23T17:50:59.73 0.3 undecidable manual S 234 49.2174 50 0.09 68
IV.PARC.HHZ. 2022-01-23T17:50:58.03 0.3 undecidable manual S 111 42.9237 50 0.06 70
IV.LMD.HHZ. 2022-01-23T17:50:55.44 0.3 undecidable manual S 356 32.3454 50 0.3 68
IV.CRMI.HHZ. 2022-01-23T17:50:54.96 0.1 undecidable manual P 271 60.7947 50 0.32 85
IV.CAFI.HHZ. 2022-01-23T17:50:53.52 3.0 undecidable manual P 0
IV.MPPT.EHZ. 2022-01-23T17:50:53.86 0.1 undecidable manual P 290 55.2003 50 0.08 91
IV.OSSC.HHZ. 2022-01-23T17:50:52.49 0.1 undecidable manual P 234 49.2174 50 -0.37 86
IV.CRE.HHZ. 2022-01-23T17:50:52.51 0.3 undecidable manual S 137 25.2525 109 -0.38 67
IV.PARC.HHZ. 2022-01-23T17:50:51.71 0.3 undecidable manual P 111 42.9237 50 -0.18 68
IV.RUFI.EHZ. 2022-01-23T17:50:50.70 0.3 undecidable manual S 287 19.1697 115 -0.23 70
IV.CRE.HHZ. 2022-01-23T17:50:49.44 0.1 undecidable manual P 137 25.2525 109 0.49 88
IV.LMD.HHZ. 2022-01-23T17:50:49.18 0.1 undecidable manual P 356 32.3454 50 -1.08 67
IV.ASQU.HHZ. 2022-01-23T17:50:47.02 0.3 undecidable manual S 75 4.1958 155 0.01 75
IV.RUFI.EHZ. 2022-01-23T17:50:47.81 0.1 undecidable manual P 287 19.1697 115 -0.02 98
IV.SFI.EHZ. 2022-01-23T17:50:47.57 0.1 undecidable manual P 34 15.6732 120 0.37 91
IV.ASQU.HHZ. 2022-01-23T17:50:45.53 0.1 undecidable manual P 75 4.1958 155 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHN. ML:1.4 0.000251 1.86 AML other m 2022-01-23T17:50:51.06
IV.SFI.EHE. ML:1.4 0.0002545 0.5 AML other m 2022-01-23T17:50:51.01
IV.CRE.HHN. ML:1.1 0.00007985 0.14 AML other m 2022-01-23T17:50:55.37
IV.CRE.HHE. ML:1.1 0.00008219999999999999 0.26 AML other m 2022-01-23T17:50:56.68
IV.OSSC.HHN. ML:1.0 0.000027400000000000002 1.24 AML other m 2022-01-23T17:51:00.85
IV.OSSC.HHE. ML:1.2 0.000039349999999999994 0.76 AML other m 2022-01-23T17:51:00.43
IV.LMD.HHE. ML:0.0 0.00019350000000000001 0.24 AML other m 2022-01-23T17:50:55.78
IV.LMD.HHN. ML:0.0 0.0001175 0.58 AML other m 2022-01-23T17:50:56.45
IV.PARC.HHE. ML:0.9 0.000023025234999999997 0.1536 AML other m 2022-01-23T17:50:59.19
IV.PARC.HHN. ML:1.0 0.00003207365 0.2176 AML other m 2022-01-23T17:50:58.75
IV.CAFI.HHE. ML:0.9 0.000020311374999999998 0.3456 AML other m 2022-01-23T17:51:01.66
IV.CAFI.HHN. ML:0.9 0.0000202642245 0.3712 AML other m 2022-01-23T17:51:04.01
IV.MPPT.EHE. ML:1.2 0.000039752375 0.256 AML other m 2022-01-23T17:51:02.40
IV.MPPT.EHN. ML:1.1 0.000028706324999999998 0.1536 AML other m 2022-01-23T17:51:02.43
IV.CRMI.HHE. ML:0.9 0.000012583023000000001 0.5248 AML other m 2022-01-23T17:51:10.59
IV.CRMI.HHN. ML:1.0 0.000021979755 0.3584 AML other m 2022-01-23T17:51:03.46
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