Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 28-09-2021 and time 20:15:04 (UTC) in region 7 km E Città di Castello (PG)

A magnitude ML 1.5 earthquake occured in region: 7 km E Città di Castello (PG), on

  • 28-09-2021 20:15:04 (UTC)
  • 28-09-2021 22:15:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4610, 12.3280 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
Città di Castello PG 7 39913 39913
Pietralunga PG 9 2111 42024
Montone PG 11 1680 43704
Apecchio PU 13 1882 45586
Monte Santa Maria Tiberina PG 14 1183 46769
San Giustino PG 16 11297 58066
Umbertide PG 17 16681 74747
Citerna PG 18 3531 78278
Monterchi AR 18 1757 80035
Sansepolcro AR 19 15884 95919

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Arezzo (99543 inhabitants)
40 Km N of Perugia (166134 inhabitants)
64 Km NW of Foligno (57155 inhabitants)
69 Km SW of Pesaro (94582 inhabitants)
70 Km S of Rimini (147750 inhabitants)
70 Km SW of Fano (60888 inhabitants)
76 Km S of Cesena (96758 inhabitants)
82 Km E of Siena (53903 inhabitants)
88 Km S of Forlì (117913 inhabitants)
93 Km E of Firenze (382808 inhabitants)
98 Km W of Ancona (100861 inhabitants)
98 Km E of Scandicci (50609 inhabitants)
99 Km SE of Faenza (58541 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 1.5 2021-09-28
20:15:04		 43.4608 12.3283 10 2022-03-30
13:04:10		 Bollettino Sismico Italiano INGV 96321111
Reviewed
Rev100 		ML 1.5 2021-09-28
20:15:04		 43.4602 12.3268 10 2021-09-28
21:05:27		 Sala Sismica INGV-Roma 96008121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-28 20:15:04 ± 0.03
Latitude 43.4608 ± 0.0018
Longitude 12.3283 ± 0.0025
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 96321111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 181
Semi-minor axis of confidence ellipse (meter) 151
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 209
Circular confidence region, given by single value of horizontal uncertainty (meter) 180.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 46
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 41
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.05486
Epicentral distance of station farthest from the epicenter (degree) 0.57647
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 36
Type of magnitude ML
Reference to an origin 96321111
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-07 14:00:31

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 36
Type of magnitude ML
Reference to an origin 96008121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-28 21:05:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MPAG.EHZ. 2021-09-28T20:15:17.92 0.1 undecidable manual S 62 39.3273 50 0.1 93
IV.CRE.HHZ. 2021-09-28T20:15:16.49 0.3 undecidable manual S 300 35.0427 50 -0.16 69
IV.EL6.EHZ. 2021-09-28T20:15:16.23 0.1 undecidable manual P 103 63.9915 50 0.2 87
IV.SSFR.HHZ. 2021-09-28T20:15:16.95 0.1 undecidable manual S 94 36.6411 50 -0.14 93
IV.MGAB.HHZ. 2021-09-28T20:15:16.09 0.1 undecidable manual P 196 63.2922 50 0.18 87
IV.ARVD.HHZ. 2021-09-28T20:15:13.83 0.1 undecidable manual P 85 49.5171 50 0.03 92
IV.PARC.HHZ. 2021-09-28T20:15:12.81 0.1 undecidable manual S 341 22.0668 114 -0.18 94
IV.MPAG.EHZ. 2021-09-28T20:15:12.12 0.1 undecidable manual P 62 39.3273 50 -0.12 93
IV.SSP9.EHZ. 2021-09-28T20:15:12.40 0.3 undecidable manual S 308 20.1687 116 -0.02 73
IV.ATCC.EHZ. 2021-09-28T20:15:12.48 0.1 undecidable manual P 140 39.627 50 0.21 91
IV.ATFO.HHZ. 2021-09-28T20:15:12.85 0.1 undecidable manual S 118 22.1556 114 -0.19 94
IV.ATBU.EHZ. 2021-09-28T20:15:11.87 0.6 undecidable manual S 85 17.7711 119 0.19 47
IV.SSFR.HHZ. 2021-09-28T20:15:11.69 0.1 undecidable manual P 94 36.6411 50 -0.12 93
IV.CAFI.HHZ. 2021-09-28T20:15:11.17 0.1 undecidable manual P 244 32.6451 50 -0.02 95
IV.PIEI.HHZ. 2021-09-28T20:15:11.96 0.1 undecidable manual S 63 18.5703 118 0.04 97
IV.FRON.EHZ. 2021-09-28T20:15:11.00 0.1 undecidable manual P 79 32.6451 50 -0.19 92
IV.ATLO.EHE. 2021-09-28T20:15:11.47 0.1 undecidable manual S 158 17.3715 120 -0.08 97
IV.CRE.HHZ. 2021-09-28T20:15:11.44 0.1 undecidable manual P 300 35.0427 50 -0.12 93
IV.PE3.EHZ. 2021-09-28T20:15:10.77 0.1 undecidable manual P 27 29.3484 50 0.08 95
IV.ATMI.HHZ. 2021-09-28T20:15:10.67 0.1 undecidable manual S 199 14.874 124 -0.14 96
IV.MURB.HHZ. 2021-09-28T20:15:10.29 0.1 undecidable manual P 144 27.0507 50 -0.04 96
IV.TB01.DHZ.01 2021-09-28T20:15:10.04 0.1 undecidable manual S 135 12.3765 129 -0.06 98
IV.APEC.HHZ. 2021-09-28T20:15:10.29 0.1 undecidable manual S 34 13.0758 127 -0.02 99
IV.SSP9.EHZ. 2021-09-28T20:15:09.25 0.1 undecidable manual P 308 20.1687 116 0.14 95
IV.ATFO.HHZ. 2021-09-28T20:15:09.56 0.1 undecidable manual P 118 22.1556 114 0.09 96
IV.TB03.DHZ.01 2021-09-28T20:15:09.24 0.1 undecidable manual S 135 9.3795 137 -0.1 98
IV.PARC.HHZ. 2021-09-28T20:15:09.49 0.1 undecidable manual P 341 22.0668 114 0.04 97
IV.NARO.HHZ. 2021-09-28T20:15:09.92 0.1 undecidable manual P 51 26.2515 50 -0.28 91
IV.ATPC.HHE. 2021-09-28T20:15:09.83 0.6 undecidable manual S 78 10.5783 133 0.18 48
IV.CDCA.HNZ. 2021-09-28T20:15:08.96 0.1 undecidable manual S 268 7.5813 143 0 100
IV.ATLO.EHE. 2021-09-28T20:15:08.64 0.1 undecidable manual P 158 17.3715 120 0.03 98
IV.APEC.HHZ. 2021-09-28T20:15:08.05 0.1 undecidable manual P 34 13.0758 127 0.15 96
IV.ATBU.EHZ. 2021-09-28T20:15:08.88 0.1 undecidable manual P 85 17.7711 119 0.2 94
IV.ATMI.HHZ. 2021-09-28T20:15:08.27 0.1 undecidable manual P 199 14.874 124 0.09 97
IV.ATPI.EHZ. 2021-09-28T20:15:08.25 0.1 undecidable manual S 101 6.0939 149 -0.4 92
IV.PIEI.HHZ. 2021-09-28T20:15:08.81 0.1 undecidable manual P 63 18.5703 118 -0.01 98
IV.ATPC.HHE. 2021-09-28T20:15:07.69 0.1 undecidable manual P 78 10.5783 133 0.17 96
IV.CDCA.HNZ. 2021-09-28T20:15:07.20 0.1 undecidable manual P 268 7.5813 143 0.09 98
IV.TB03.DHZ.01 2021-09-28T20:15:07.45 0.1 undecidable manual P 135 9.3795 137 0.12 97
IV.TB01.DHZ.01 2021-09-28T20:15:07.86 0.1 undecidable manual P 135 12.3765 129 0.08 98
IV.ATPI.EHZ. 2021-09-28T20:15:06.96 0.1 undecidable manual P 101 6.0939 149 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATPI.HNN. ML:1.7 0.000772 0.5 AML other m 2021-09-28T20:15:08.42
IV.ATPI.EHN. ML:1.7 0.0008200000000000001 0.5 AML other m 2021-09-28T20:15:08.43
IV.ATPI.HNE. ML:1.9 0.0012649999999999998 0.54 AML other m 2021-09-28T20:15:08.42
IV.ATPI.EHE. ML:1.9 0.0012165 0.54 AML other m 2021-09-28T20:15:08.43
IV.APEC.HHN. ML:1.7 0.000589 0.26 AML other m 2021-09-28T20:15:10.64
IV.ATMI.HHE. ML:1.8 0.0006325 1.68 AML other m 2021-09-28T20:15:10.05
IV.ATMI.HHN. ML:1.8 0.0005480000000000001 1.7 AML other m 2021-09-28T20:15:11.05
IV.PIEI.HHN. ML:1.3 0.000157 0.4 AML other m 2021-09-28T20:15:12.84
IV.PIEI.HHE. ML:1.4 0.0001795 0.14 AML other m 2021-09-28T20:15:12.80
IV.APEC.HHE. ML:1.7 0.000524 1.62 AML other m 2021-09-28T20:15:13.96
IV.ATFO.HHE. ML:1.6 0.0002445 0.18 AML other m 2021-09-28T20:15:13.25
IV.ATFO.HHN. ML:1.5 0.000228 0.3 AML other m 2021-09-28T20:15:13.19
IV.PARC.HHE. ML:1.5 0.0002035 0.44 AML other m 2021-09-28T20:15:13.65
IV.NARO.HHE. ML:1.3 0.00010785 0.18 AML other m 2021-09-28T20:15:14.17
IV.PARC.HHN. ML:1.4 0.00014850000000000003 1.36 AML other m 2021-09-28T20:15:14.83
IV.NARO.HHN. ML:1.4 0.0001285 0.16 AML other m 2021-09-28T20:15:14.95
IV.MURB.HHN. ML:1.7 0.00027649999999999994 1.68 AML other m 2021-09-28T20:15:16.10
IV.FRON.EHN. ML:1.6 0.0001705 0.28 AML other m 2021-09-28T20:15:16.14
IV.FRON.EHE. ML:1.1 0.000059749999999999995 0.74 AML other m 2021-09-28T20:15:16.31
IV.PE3.EHN. ML:1.6 0.000176 0.78 AML other m 2021-09-28T20:15:16.93
IV.MURB.HHE. ML:1.6 0.0002235 0.28 AML other m 2021-09-28T20:15:17.82
IV.CAFI.HHN. ML:0.9 0.000036750000000000006 0.58 AML other m 2021-09-28T20:15:17.69
IV.CRE.HHE. ML:1.1 0.000053349999999999996 0.18 AML other m 2021-09-28T20:15:17.63
IV.SSFR.HHN. ML:1.8 0.0002195 0.46 AML other m 2021-09-28T20:15:17.79
IV.SSFR.HHE. ML:1.6 0.00017099999999999998 0.56 AML other m 2021-09-28T20:15:17.55
IV.CAFI.HHE. ML:1.0 0.00004545 1.18 AML other m 2021-09-28T20:15:17.95
IV.CRE.HHN. ML:1.4 0.00009085 1.32 AML other m 2021-09-28T20:15:18.74
IV.MPAG.EHN. ML:1.1 0.000040900000000000005 0.36 AML other m 2021-09-28T20:15:18.35
IV.MPAG.EHE. ML:1.2 0.00004755 0.14 AML other m 2021-09-28T20:15:18.47
IV.PE3.EHE. ML:1.4 0.0001343 1.66 AML other m 2021-09-28T20:15:18.14
IV.ATCC.EHE. ML:1.3 0.0000686 0.18 AML other m 2021-09-28T20:15:20.53
IV.ATCC.EHN. ML:1.4 0.0000818 0.3 AML other m 2021-09-28T20:15:20.98
IV.ARVD.HHN. ML:1.2 0.000039349999999999994 0.44 AML other m 2021-09-28T20:15:21.60
IV.ARVD.HHE. ML:1.1 0.000034500000000000005 0.48 AML other m 2021-09-28T20:15:21.95
IV.MGAB.HHN. ML:1.4 0.00004955 0.82 AML other m 2021-09-28T20:15:26.31
IV.MGAB.HHE. ML:1.4 0.00005035 0.72 AML other m 2021-09-28T20:15:28.45
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