Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 27-12-2021 and time 03:24:36 (UTC) in region 4 km NW Apecchio (PU)

A magnitude ML 1.9 earthquake occured in region: 4 km NW Apecchio (PU), on

  • 27-12-2021 03:24:36 (UTC)
  • 27-12-2021 04:24:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.5790, 12.3810 at 9 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
Apecchio PU 4 1882 1882
Mercatello sul Metauro PU 9 1378 3260
Sant'Angelo in Vado PU 10 4133 7393
Piobbico PU 11 2029 9422
Borgo Pace PU 11 606 10028
Urbania PU 15 7099 17127
Belforte all'Isauro PU 16 769 17896
Pietralunga PG 16 2111 20007
Sestino AR 16 1355 21362
Peglio PU 16 696 22058
Piandimeleto PU 17 2167 24225
San Giustino PG 17 11297 35522
Città di Castello PG 18 39913 75435
Lunano PU 18 1527 76962
Sansepolcro AR 19 15884 92846

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km E of Arezzo (99543 inhabitants)
52 Km N of Perugia (166134 inhabitants)
56 Km S of Rimini (147750 inhabitants)
57 Km SW of Pesaro (94582 inhabitants)
59 Km SW of Fano (60888 inhabitants)
63 Km S of Cesena (96758 inhabitants)
74 Km NW of Foligno (57155 inhabitants)
77 Km SE of Forlì (117913 inhabitants)
88 Km SE of Faenza (58541 inhabitants)
89 Km E of Siena (53903 inhabitants)
92 Km W of Ancona (100861 inhabitants)
93 Km E of Firenze (382808 inhabitants)
94 Km S of Ravenna (159116 inhabitants)
99 Km E of Scandicci (50609 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 2021-12-27
03:24:36		 43.5788 12.3808 9 2022-03-30
13:04:31		 Bollettino Sismico Italiano INGV 99852411
Reviewed
Rev100 		ML 1.9 2021-12-27
03:24:36		 43.5672 12.3802 8 2021-12-27
03:29:09		 Sala Sismica INGV-Roma 99039071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-27 03:24:36 ± 0.04
Latitude 43.5788 ± 0.0027
Longitude 12.3808 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99852411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 314
Semi-minor axis of confidence ellipse (meter) 62
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 32
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 39
Number of associated phases, regardless of their use for origin computation 60
Number of defining phases 60
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.03507
Epicentral distance of station farthest from the epicenter (degree) 0.98116
Number of stations at which the event was observed 42
Number of stations from which data was used for origin computation 42
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 64
Type of magnitude ML
Reference to an origin 99852411
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-31 17:37:03

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 64
Type of magnitude ML
Reference to an origin 99039071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-27 03:29:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-12-27T03:24:57.77 0.6 undecidable manual S 115 64.2912 50 0.91 35
IV.SNTG.HHZ. 2021-12-27T03:24:55.77 0.6 undecidable manual S 128 57.6978 50 0.68 39
IV.ARCI.HHZ. 2021-12-27T03:24:55.67 1.0 undecidable manual P 223 108.9132 50 0.45 19
IV.ATCC.EHZ. 2021-12-27T03:24:53.30 1.0 undecidable manual S 154 48.4182 50 0.68 20
IV.FDMO.HHZ. 2021-12-27T03:24:51.27 1.0 undecidable manual P 136 82.8504 50 0.06 22
IV.CSP1.EHZ. 2021-12-27T03:24:51.78 1.0 undecidable manual P 129 85.6476 50 0.14 21
IV.CESI.HHZ. 2021-12-27T03:24:50.24 0.3 undecidable manual P 146 76.4679 50 0.02 67
IV.MGAB.HHZ. 2021-12-27T03:24:50.45 0.3 undecidable manual P 196 77.0673 50 0.14 65
IV.MURB.HHZ. 2021-12-27T03:24:49.80 1.0 undecidable manual S 162 36.9297 50 0.25 23
IV.CING.HHZ. 2021-12-27T03:24:49.05 1.0 undecidable manual P 109 69.375 50 -0.07 22
IV.ASSB.HHZ. 2021-12-27T03:24:48.26 0.6 undecidable manual P 159 63.5919 50 0.03 46
IV.CRE.HHZ. 2021-12-27T03:24:48.42 0.6 undecidable manual S 277 34.743 50 -0.56 43
IV.EL6.EHZ. 2021-12-27T03:24:48.23 0.6 undecidable manual P 115 64.2912 50 -0.12 45
IV.CPGN.EHZ. 2021-12-27T03:24:47.22 0.6 undecidable manual S 349 25.1526 109 1.28 31
IV.ATMI.HHZ. 2021-12-27T03:24:47.10 0.6 undecidable manual S 199 28.6491 107 0 49
IV.MPAG.EHZ. 2021-12-27T03:24:47.35 0.6 undecidable manual S 79 30.9468 106 -0.51 44
IV.SNTG.HHZ. 2021-12-27T03:24:47.34 0.3 undecidable manual P 128 57.6978 50 0.02 69
IV.ATLO.EHE. 2021-12-27T03:24:47.18 0.6 undecidable manual S 176 29.3484 107 -0.15 47
IV.SFI.EHZ. 2021-12-27T03:24:46.93 0.3 undecidable manual P 310 55.9995 50 -0.14 68
IV.COR1.EHZ. 2021-12-27T03:24:46.50 0.6 undecidable manual P 83 50.1165 50 0.34 44
IV.FRON.EHZ. 2021-12-27T03:24:46.66 0.6 undecidable manual S 104 28.5492 107 -0.41 45
IV.ATFO.HHZ. 2021-12-27T03:24:46.80 1.0 undecidable manual S 147 28.1496 107 -0.12 24
IV.PESA.HHZ. 2021-12-27T03:24:46.93 1.0 undecidable manual P 42 54.501 50 0.1 23
IV.ASQU.HHZ. 2021-12-27T03:24:46.33 0.3 undecidable manual P 297 53.2023 50 -0.31 66
IV.CRTC.HHZ. 2021-12-27T03:24:45.42 0.3 undecidable manual P 62 45.4212 50 -0.02 71
IV.TB02.DHZ.01 2021-12-27T03:24:45.60 0.6 undecidable manual S 174 23.2545 111 0.28 47
IV.CAFI.HHZ. 2021-12-27T03:24:45.00 0.1 undecidable manual P 230 43.4232 50 -0.12 93
IV.ARVD.HHZ. 2021-12-27T03:24:45.27 1.0 undecidable manual P 101 46.0206 50 -0.25 23
IV.ATCC.EHZ. 2021-12-27T03:24:45.99 0.3 undecidable manual P 154 48.4182 50 0.09 70
IV.FOSV.EHZ. 2021-12-27T03:24:45.19 0.6 undecidable manual P 136 43.9227 50 -0.02 47
IV.RSM2.HHE. 2021-12-27T03:24:45.36 1.0 undecidable manual P 7 40.1265 50 0.74 20
IV.MURB.HHZ. 2021-12-27T03:24:44.09 0.1 undecidable manual P 162 36.9297 50 -0.03 96
IV.SSP9.EHZ. 2021-12-27T03:24:44.40 1.0 undecidable manual S 268 20.0688 113 0.1 24
IV.CRE.HHZ. 2021-12-27T03:24:43.44 0.1 undecidable manual P 277 34.743 50 -0.35 90
IV.ATVA.EHE. 2021-12-27T03:24:43.34 0.6 undecidable manual P 193 34.2435 50 -0.37 45
IV.SSFR.HHZ. 2021-12-27T03:24:43.48 1.0 undecidable manual P 116 35.9418 50 -0.5 22
IV.ATMI.HHZ. 2021-12-27T03:24:42.65 0.1 undecidable manual P 199 28.6491 107 -0.06 97
IV.PIEI.HHZ. 2021-12-27T03:24:42.00 0.3 undecidable manual S 111 13.2756 123 -0.22 72
IV.ATFO.HHZ. 2021-12-27T03:24:42.40 0.3 undecidable manual P 147 28.1496 107 -0.21 70
IV.BADI.EHZ. 2021-12-27T03:24:42.40 1.0 undecidable manual S 235 13.3755 123 0.14 24
IV.ATSC.EHE. 2021-12-27T03:24:42.63 0.6 undecidable manual P 125 29.9478 106 -0.34 46
IV.CPGN.EHZ. 2021-12-27T03:24:42.46 0.1 undecidable manual P 349 25.1526 109 0.42 90
IV.ATLO.EHE. 2021-12-27T03:24:42.66 0.1 undecidable manual P 176 29.3484 107 -0.18 94
IV.ATPC.HHE. 2021-12-27T03:24:42.50 0.6 undecidable manual S 151 12.4764 125 0.5 45
IV.FRON.EHZ. 2021-12-27T03:24:42.28 0.3 undecidable manual P 104 28.5492 107 -0.41 67
IV.MPAG.EHZ. 2021-12-27T03:24:42.73 0.3 undecidable manual P 79 30.9468 106 -0.42 67
IV.PARC.HHZ. 2021-12-27T03:24:42.10 0.3 undecidable manual S 304 13.7751 122 -0.27 71
IV.ATMC.EHE. 2021-12-27T03:24:41.27 0.1 undecidable manual P 226 21.0678 112 -0.01 99
IT.SNS1.HNZ. 2021-12-27T03:24:41.19 0.3 undecidable manual P 268 20.0688 113 0.1 73
IV.TB03.DHZ.01 2021-12-27T03:24:41.17 0.3 undecidable manual P 173 19.869 114 0.12 73
IV.TB02.DHZ.01 2021-12-27T03:24:41.80 0.6 undecidable manual P 174 23.2545 111 0.12 48
IV.SSP9.EHZ. 2021-12-27T03:24:41.12 0.1 undecidable manual P 268 20.0688 113 0.03 99
IV.PARC.HHZ. 2021-12-27T03:24:40.00 0.1 undecidable manual P 304 13.7751 122 0.02 100
IV.ATPC.HHE. 2021-12-27T03:24:40.03 0.1 undecidable manual P 151 12.4764 125 0.27 95
IV.PE3.EHZ. 2021-12-27T03:24:40.42 0.1 undecidable manual P 35 15.9729 119 0.07 99
IV.APEC.HNZ. 2021-12-27T03:24:40.00 0.3 undecidable manual S 126 3.8961 156 -0.02 76
IV.BADI.EHZ. 2021-12-27T03:24:40.10 0.3 undecidable manual P 235 13.3755 123 0.19 73
IV.PIEI.HHZ. 2021-12-27T03:24:39.81 0.1 undecidable manual P 111 13.2756 123 -0.08 99
IV.SAIV.HNZ. 2021-12-27T03:24:39.29 0.3 undecidable manual P 15 9.879 131 -0.06 75
IV.APEC.HNZ. 2021-12-27T03:24:38.81 0.1 undecidable manual P 126 3.8961 156 0.19 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PIEI.HHE. ML:2.3 0.002355 0.38 AML other m 2021-12-27T03:24:42.24
IV.PIEI.HNE. ML:2.3 0.00209 0.14 AML other m 2021-12-27T03:24:42.36
IV.PARC.HHN. ML:1.8 0.000795 0.2 AML other m 2021-12-27T03:24:42.67
IV.PIEI.HNN. ML:1.9 0.0009180000000000001 0.94 AML other m 2021-12-27T03:24:42.42
IV.PIEI.HHN. ML:2.0 0.000999 0.12 AML other m 2021-12-27T03:24:42.83
IV.BADI.EHE. ML:2.4 0.0026550000000000002 0.22 AML other m 2021-12-27T03:24:43.00
IV.PARC.HHE. ML:1.8 0.000739 0.2 AML other m 2021-12-27T03:24:43.71
IV.BADI.EHN. ML:2.3 0.002185 0.38 AML other m 2021-12-27T03:24:43.83
IV.PE3.EHE. ML:2.2 0.0016200000000000001 0.32 AML other m 2021-12-27T03:24:44.10
IV.PE3.EHN. ML:2.3 0.001745 0.3 AML other m 2021-12-27T03:24:44.29
IV.SSP9.EHN. ML:1.7 0.000358 1.28 AML other m 2021-12-27T03:24:45.69
IV.SSP9.EHE. ML:1.6 0.000272 0.64 AML other m 2021-12-27T03:24:45.39
IV.ATFO.HHE. ML:1.6 0.00023415479999999998 0.2992 AML other m 2021-12-27T03:24:47.07
IV.FRON.EHN. ML:2.0 0.00048450000000000007 0.1 AML other m 2021-12-27T03:24:47.62
IV.CPGN.HNN. ML:1.9 0.0005325 0.34 AML other m 2021-12-27T03:24:47.88
IV.CPGN.EHE. ML:1.9 0.0004645 0.36 AML other m 2021-12-27T03:24:47.72
IV.MPAG.EHE. ML:1.6 0.0001959207 0 AML other m 2021-12-27T03:24:47.84
IV.FRON.EHE. ML:1.6 0.0001975 1.16 AML other m 2021-12-27T03:24:47.88
IV.ATFO.HHN. ML:1.7 0.00028700000000000004 1.04 AML other m 2021-12-27T03:24:47.43
IV.CPGN.EHN. ML:1.9 0.00047850000000000003 1.12 AML other m 2021-12-27T03:24:48.59
IV.ATMI.HHE. ML:2.0 0.0005235 1.46 AML other m 2021-12-27T03:24:48.96
IV.MPAG.EHN. ML:1.7 0.0002245 0.64 AML other m 2021-12-27T03:24:48.48
IV.ATMI.HHN. ML:1.9 0.000375 1 AML other m 2021-12-27T03:24:48.96
IV.CPGN.HNE. ML:1.8 0.00040849999999999995 0.24 AML other m 2021-12-27T03:24:49.14
IV.CRE.HHN. ML:1.9 0.0003305 0.22 AML other m 2021-12-27T03:24:49.47
IV.CRE.HHE. ML:1.6 0.00016534335 0.1584 AML other m 2021-12-27T03:24:49.64
IV.SSFR.HNE. ML:2.5 0.0011585 1 AML other m 2021-12-27T03:24:50.69
IV.SSFR.HHE. ML:2.4 0.0010265 0.64 AML other m 2021-12-27T03:24:50.69
IV.MURB.HHN. ML:2.4 0.000852 0.96 AML other m 2021-12-27T03:24:50.38
IV.MURB.HNN. ML:2.3 0.0008355 0.46 AML other m 2021-12-27T03:24:50.38
IV.SSFR.HHN. ML:2.5 0.0011949999999999999 0.64 AML other m 2021-12-27T03:24:50.37
IV.SSFR.HNN. ML:2.5 0.0012050000000000001 0.68 AML other m 2021-12-27T03:24:50.71
IV.MURB.HHE. ML:2.4 0.0009605 0.54 AML other m 2021-12-27T03:24:50.81
IV.MURB.HNE. ML:2.4 0.000873 0.54 AML other m 2021-12-27T03:24:50.82
IV.CAFI.HHE. ML:1.7 0.0001545 0.36 AML other m 2021-12-27T03:24:52.19
IV.CAFI.HHN. ML:1.8 0.0002235 0.46 AML other m 2021-12-27T03:24:52.22
IV.CAFI.HNN. ML:1.8 0.000201 0.14 AML other m 2021-12-27T03:24:52.22
IV.CAFI.HNE. ML:1.7 0.0001435 0.58 AML other m 2021-12-27T03:24:52.43
IV.FOSV.EHE. ML:1.6 0.00011454999999999999 0.62 AML other m 2021-12-27T03:24:52.33
IV.ARVD.HHE. ML:1.7 0.000136 0.12 AML other m 2021-12-27T03:24:53.63
IV.ARVD.HHN. ML:1.6 0.0001295 0.1 AML other m 2021-12-27T03:24:54.05
IV.FOSV.EHN. ML:1.5 0.00008989999999999999 0.58 AML other m 2021-12-27T03:24:54.34
IV.ASQU.HHN. ML:1.6 0.00008400000000000001 0.2 AML other m 2021-12-27T03:24:54.66
IV.CRTC.HHN. ML:2.1 0.00040249999999999997 1.54 AML other m 2021-12-27T03:24:54.08
IV.ASQU.HHE. ML:1.5 0.00006845 0.48 AML other m 2021-12-27T03:24:54.87
IV.ATCC.EHE. ML:1.9 0.000211 0.48 AML other m 2021-12-27T03:24:55.32
IV.PESA.HHE. ML:2.4 0.000682 0.2 AML other m 2021-12-27T03:24:55.62
IV.PESA.HHN. ML:2.3 0.000488 0.18 AML other m 2021-12-27T03:24:55.91
IV.CRTC.HHE. ML:2.0 0.0002785 1.26 AML other m 2021-12-27T03:24:55.93
IV.SNTG.HHN. ML:1.8 0.00013700000000000002 0.22 AML other m 2021-12-27T03:24:56.43
IV.SNTG.HHE. ML:1.6 0.0000835 0.88 AML other m 2021-12-27T03:24:56.42
IV.CING.HHN. ML:1.5 0.000054199999999999996 0.56 AML other m 2021-12-27T03:24:59.19
IV.EL6.EHE. ML:1.9 0.0001395 0.82 AML other m 2021-12-27T03:24:59.99
IV.ATCC.EHN. ML:1.8 0.00019250000000000002 0.9 AML other m 2021-12-27T03:24:59.65
IV.CING.HHE. ML:1.6 0.0000585 0.18 AML other m 2021-12-27T03:25:01.02
IV.ASSB.HHE. ML:1.6 0.00007605 0.42 AML other m 2021-12-27T03:25:01.83
IV.ASSB.HHN. ML:1.6 0.0000798 0.58 AML other m 2021-12-27T03:25:02.88
IV.EL6.EHN. ML:1.8 0.00011675 0.46 AML other m 2021-12-27T03:25:03.94
IV.MGAB.HHN. ML:1.9 0.000121 0.46 AML other m 2021-12-27T03:25:04.54
IV.MGAB.HHE. ML:1.9 0.00011645 0.56 AML other m 2021-12-27T03:25:04.67
IV.CSP1.EHN. ML:2.0 0.00013565 0.42 AML other m 2021-12-27T03:25:06.02
IV.FDMO.HHE. ML:1.6 0.0000496 0.16 AML other m 2021-12-27T03:25:09.49
IV.CSP1.EHE. ML:2.1 0.000158 0.46 AML other m 2021-12-27T03:25:10.47
IV.FDMO.HHN. ML:1.6 0.00004775 0.42 AML other m 2021-12-27T03:25:15.26
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