Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 13-03-2023 and time 18:47:44 (UTC) in region 6 km NE Città di Castello (PG)

A magnitude ML 1.1 earthquake occured in region: 6 km NE Città di Castello (PG), on

  • 13-03-2023 18:47:44 (UTC)
  • 13-03-2023 19:47:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.4990, 12.2900 at 7 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 6 39913 39913
San Giustino PG 11 11297 51210
Monte Santa Maria Tiberina PG 12 1183 52393
Apecchio PU 12 1882 54275
Pietralunga PG 13 2111 56386
Citerna PG 14 3531 59917
Monterchi AR 14 1757 61674
Sansepolcro AR 14 15884 77558
Montone PG 15 1680 79238
Mercatello sul Metauro PU 17 1378 80616
Borgo Pace PU 18 606 81222
Anghiari AR 19 5638 86860

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Arezzo (99543 inhabitants)
44 Km N of Perugia (166134 inhabitants)
66 Km SW of Rimini (147750 inhabitants)
68 Km SW of Pesaro (94582 inhabitants)
69 Km NW of Foligno (57155 inhabitants)
70 Km SW of Fano (60888 inhabitants)
71 Km S of Cesena (96758 inhabitants)
80 Km E of Siena (53903 inhabitants)
83 Km S of Forlì (117913 inhabitants)
89 Km E of Firenze (382808 inhabitants)
93 Km SE of Faenza (58541 inhabitants)
94 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 1.1 2023-03-13
18:47:44		 43.4992 12.2903 7 2024-03-01
17:18:03		 Bollettino Sismico Italiano INGV 116347101
Reviewed
Rev100 		ML 1.2 2023-03-13
18:47:43		 43.4975 12.2863 10 2023-03-13
19:17:06		 Sala Sismica INGV-Roma 115329871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-13 18:47:44 ± 0.09
Latitude 43.4992 ± 0.0027
Longitude 12.2903 ± 0.0037
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 116347101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 340
Semi-minor axis of confidence ellipse (meter) 59
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 146
Circular confidence region, given by single value of horizontal uncertainty (meter) 340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.77971
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 116347101
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-04-13 16:13:21

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 115329871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-13 19:17:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2023-03-13T18:47:59.14 1.0 undecidable manual P 121 86.5467 50 -0.38 20
IV.ATCC.EHZ. 2023-03-13T18:47:53.76 0.3 undecidable manual P 141 44.8218 50 0.67 60
IV.ATLO.EHE. 2023-03-13T18:47:52.02 0.3 undecidable manual S 155 22.4553 106 -0.3 69
IV.PIEI.HHZ. 2023-03-13T18:47:51.51 0.3 undecidable manual S 78 20.0688 108 -0.03 74
IV.ATMI.HHZ. 2023-03-13T18:47:51.04 0.3 undecidable manual S 186 18.3705 110 0.06 73
IV.MURB.HHE. 2023-03-13T18:47:50.95 1.0 undecidable manual P 144 32.2455 102 0.15 23
IV.ATVO.HHZ. 2023-03-13T18:47:50.41 0.3 undecidable manual S 144 15.9729 112 0.2 72
IV.PARC.HHZ. 2023-03-13T18:47:50.65 0.3 undecidable manual S 346 17.0718 111 0.09 73
IV.CAFI.HHZ. 2023-03-13T18:47:50.28 0.3 undecidable manual P 234 32.2455 102 -0.5 65
IV.APEC.HHZ. 2023-03-13T18:47:49.21 0.3 undecidable manual S 58 12.2766 118 0.16 73
IV.ATVA.EHE. 2023-03-13T18:47:49.68 0.6 undecidable manual P 181 24.4533 105 0.41 45
IV.ATPC.HHE. 2023-03-13T18:47:49.54 0.3 undecidable manual S 99 13.5753 116 0.11 73
IV.ATMI.HHZ. 2023-03-13T18:47:48.37 0.6 undecidable manual P 186 18.3705 110 0.26 47
IV.ATPI.EHZ. 2023-03-13T18:47:48.42 0.1 undecidable manual S 121 10.4784 122 -0.08 99
IV.PIEI.HHZ. 2023-03-13T18:47:48.35 0.3 undecidable manual P 78 20.0688 108 -0.08 73
IV.SSP9.EHZ. 2023-03-13T18:47:48.95 3.0 undecidable manual P 0
IV.ATLO.EHE. 2023-03-13T18:47:48.65 0.3 undecidable manual P 155 22.4553 106 -0.24 70
IV.ATMC.EHE. 2023-03-13T18:47:48.17 0.3 undecidable manual S 234 9.7791 124 -0.12 74
IV.ATBU.EHZ. 2023-03-13T18:47:48.48 0.3 undecidable manual P 97 20.9679 108 -0.12 72
IV.APEC.HHZ. 2023-03-13T18:47:47.00 0.1 undecidable manual P 58 12.2766 118 0 100
IV.CDCA.HNZ. 2023-03-13T18:47:47.72 0.1 undecidable manual S 225 6.3936 136 0.32 95
IV.ATVO.HHZ. 2023-03-13T18:47:47.54 0.1 undecidable manual P 144 15.9729 112 -0.13 97
IV.PARC.HHZ. 2023-03-13T18:47:47.76 0.3 undecidable manual P 346 17.0718 111 -0.11 73
IV.ATPC.HHE. 2023-03-13T18:47:47.18 0.3 undecidable manual P 99 13.5753 116 -0.04 74
IV.ATMC.EHE. 2023-03-13T18:47:46.48 0.1 undecidable manual P 234 9.7791 124 -0.08 99
IV.ATPI.EHZ. 2023-03-13T18:47:46.54 0.1 undecidable manual P 121 10.4784 122 -0.14 98
IV.CDCA.HNZ. 2023-03-13T18:47:46.10 0.1 undecidable manual P 225 6.3936 136 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.APEC.HHN. ML:1.3 0.000251 0.18 AML other m 2023-03-13T18:47:49.42
IV.APEC.HHE. ML:1.1 0.000158 0.36 AML other m 2023-03-13T18:47:49.73
IV.ATVO.HHN. ML:1.2 0.00014050000000000003 0.3 AML other m 2023-03-13T18:47:50.78
IV.ATVO.HHE. ML:1.1 0.000126 0.54 AML other m 2023-03-13T18:47:50.69
IV.PARC.HHE. ML:1.2 0.00014050000000000003 0.24 AML other m 2023-03-13T18:47:51.06
IV.PARC.HHN. ML:1.1 0.000123 1.76 AML other m 2023-03-13T18:47:51.98
IV.PIEI.HHE. ML:0.9 0.00006335000000000001 0.12 AML other m 2023-03-13T18:47:51.89
IV.PIEI.HHN. ML:0.8 0.00004385 1.78 AML other m 2023-03-13T18:47:52.98
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