Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 27-12-2021 and time 02:05:45 (UTC) in region 7 km W Borgo Pace (PU)

A magnitude ML 0.9 earthquake occured in region: 7 km W Borgo Pace (PU), on

  • 27-12-2021 02:05:45 (UTC)
  • 27-12-2021 03:05:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.6330, 12.2170 at 10 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
Borgo Pace PU 7 606 606
Badia Tedalda AR 9 1087 1693
Sansepolcro AR 9 15884 17577
San Giustino PG 10 11297 28874
Mercatello sul Metauro PU 10 1378 30252
Sestino AR 11 1355 31607
Pieve Santo Stefano AR 15 3183 34790
Belforte all'Isauro PU 16 769 35559
Anghiari AR 16 5638 41197
Sant'Angelo in Vado PU 16 4133 45330
Citerna PG 17 3531 48861
Monterchi AR 18 1757 50618
Apecchio PU 18 1882 52500
Casteldelci RN 18 407 52907
Caprese Michelangelo AR 19 1426 54333
Piandimeleto PU 19 2167 56500
Carpegna PU 19 1674 58174
Città di Castello PG 20 39913 98087
Frontino PU 20 293 98380

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km NE of Arezzo (99543 inhabitants)
55 Km SW of Rimini (147750 inhabitants)
56 Km S of Cesena (96758 inhabitants)
60 Km N of Perugia (166134 inhabitants)
64 Km W of Pesaro (94582 inhabitants)
67 Km S of Forlì (117913 inhabitants)
69 Km W of Fano (60888 inhabitants)
77 Km SE of Faenza (58541 inhabitants)
79 Km E of Firenze (382808 inhabitants)
79 Km E of Siena (53903 inhabitants)
84 Km E of Scandicci (50609 inhabitants)
85 Km NW of Foligno (57155 inhabitants)
87 Km S of Ravenna (159116 inhabitants)
90 Km SE of Imola (69797 inhabitants)
94 Km E of Prato (191150 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 0.9 2021-12-27
02:05:45		 43.6327 12.2167 10 2022-03-30
13:04:33		 Bollettino Sismico Italiano INGV 100410221
Reviewed
Rev100 		ML 0.9 2021-12-27
02:05:45		 43.6327 12.2167 11 2021-12-27
02:11:56		 Sala Sismica INGV-Roma 99036871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-27 02:05:45 ± 0.09
Latitude 43.6327 ± 0.0054
Longitude 12.2167 ± 0.0075
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100410221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 636
Semi-minor axis of confidence ellipse (meter) 497
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 150
Circular confidence region, given by single value of horizontal uncertainty (meter) 640.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.02248
Epicentral distance of station farthest from the epicenter (degree) 0.35343
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 100410221
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-31 17:14:34

ML:0.9

Field Value
Value 0.9
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 99036871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-27 02:11:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PIEI.HHZ. 2021-12-27T02:05:55.01 0.6 undecidable manual S 113 27.75 50 -0.33 47
IV.CPGN.EHZ. 2021-12-27T02:05:54.19 0.3 undecidable manual S 24 20.4684 117 0.93 60
IV.ATPC.HHE. 2021-12-27T02:05:54.99 0.6 undecidable manual S 131 25.6521 50 0.21 47
IV.PE3.EHZ. 2021-12-27T02:05:54.17 0.3 undecidable manual S 72 23.5542 50 -0.04 76
IV.ATMC.EHE. 2021-12-27T02:05:53.42 0.3 undecidable manual S 185 20.6682 117 0.08 75
IV.CRE.HHZ. 2021-12-27T02:05:53.40 0.6 undecidable manual S 266 21.3675 116 -0.14 49
IV.CAFI.HHE. 2021-12-27T02:05:53.10 0.1 undecidable manual P 211 39.2274 50 0.23 92
IV.APEC.HHZ. 2021-12-27T02:05:52.90 0.6 undecidable manual S 117 18.2706 119 0.3 49
IV.BADI.EHZ. 2021-12-27T02:05:51.59 0.6 undecidable manual S 171 13.7751 127 0.29 49
IV.ATMI.HHZ. 2021-12-27T02:05:51.94 0.3 undecidable manual P 173 33.3444 50 -0.03 74
IV.CPGN.EHZ. 2021-12-27T02:05:50.10 0.1 undecidable manual P 24 20.4684 117 0.2 99
IV.ATPC.HHE. 2021-12-27T02:05:50.65 0.3 undecidable manual P 131 25.6521 50 -0.13 74
IV.PE3.EHZ. 2021-12-27T02:05:50.39 0.1 undecidable manual P 72 23.5542 50 -0.06 100
IV.SSP9.EHZ. 2021-12-27T02:05:50.41 0.3 undecidable manual S 227 9.4794 138 0.24 75
IV.PIEI.HHZ. 2021-12-27T02:05:50.72 0.1 undecidable manual P 113 27.75 50 -0.38 93
IV.APEC.HHZ. 2021-12-27T02:05:49.70 0.3 undecidable manual P 117 18.2706 119 0.18 74
IV.ATMC.EHE. 2021-12-27T02:05:49.84 0.1 undecidable manual P 185 20.6682 117 -0.1 99
IV.CRE.HHZ. 2021-12-27T02:05:49.97 0.1 undecidable manual P 266 21.3675 116 -0.09 99
IV.BADI.EHZ. 2021-12-27T02:05:48.94 0.1 undecidable manual P 171 13.7751 127 0.17 100
IV.PARC.HHZ. 2021-12-27T02:05:48.09 0.6 undecidable manual S 45 2.4975 166 -0.91 37
IV.SSP9.EHZ. 2021-12-27T02:05:48.30 0.3 undecidable manual P 227 9.4794 138 0.18 76
IV.PARC.HHZ. 2021-12-27T02:05:47.10 0.1 undecidable manual P 45 2.4975 166 -0.34 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PARC.HHN. ML:1.6 0.00074547155 0.0608 AML other m 2021-12-27T02:05:48.18
IV.PARC.HHE. ML:1.7 0.00096850915 0.1408 AML other m 2021-12-27T02:05:48.22
IV.BADI.EHN. ML:1.2 0.0001505 0.1 AML other m 2021-12-27T02:05:51.76
IV.BADI.EHE. ML:0.9 0.00008392156000000001 1.84 AML other m 2021-12-27T02:05:52.92
IV.APEC.HHE. ML:0.7 0.000039028124999999995 0.2016 AML other m 2021-12-27T02:05:53.41
IV.CRE.HHE. ML:0.5 0.0000191685 0.1792 AML other m 2021-12-27T02:05:53.61
IV.CRE.HHN. ML:0.6 0.000031669345 1.8192 AML other m 2021-12-27T02:05:54.07
IV.APEC.HHN. ML:0.6 0.00003354124 1.72 AML other m 2021-12-27T02:05:54.11
IV.PE3.EHE. ML:1.4 0.00016357830000000002 0.3392 AML other m 2021-12-27T02:05:54.65
IV.PE3.EHN. ML:1.4 0.0001770514 1.68 AML other m 2021-12-27T02:05:55.88
IV.PIEI.HHE. ML:0.7 0.000027388725000000003 0.12 AML other m 2021-12-27T02:05:55.37
IV.PIEI.HHN. ML:0.6 0.000021244925499999997 0.0992 AML other m 2021-12-27T02:05:55.39
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