Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 09-03-2023 and time 12:40:05 (UTC) in region 6 km NE Città di Castello (PG)

A magnitude ML 1.2 earthquake occured in region: 6 km NE Città di Castello (PG), on

  • 09-03-2023 12:40:05 (UTC)
  • 09-03-2023 13:40:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.4970, 12.2850 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
Città di Castello PG 6 39913 39913
San Giustino PG 11 11297 51210
Monte Santa Maria Tiberina PG 12 1183 52393
Apecchio PU 13 1882 54275
Citerna PG 14 3531 57806
Pietralunga PG 14 2111 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)
67 Km SW of Rimini (147750 inhabitants)
68 Km SW of Pesaro (94582 inhabitants)
69 Km NW of Foligno (57155 inhabitants)
71 Km SW of Fano (60888 inhabitants)
71 Km S of Cesena (96758 inhabitants)
79 Km E of Siena (53903 inhabitants)
83 Km S of Forlì (117913 inhabitants)
88 Km E of Firenze (382808 inhabitants)
93 Km E of Scandicci (50609 inhabitants)
94 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 1.2 2023-03-09
12:40:05		 43.4967 12.2852 9 2024-03-01
17:18:01		 Bollettino Sismico Italiano INGV 116029571
Reviewed
Rev100 		ML 1.2 2023-03-09
12:40:05		 43.4948 12.2832 8 2023-03-09
12:46:15		 Sala Sismica INGV-Roma 115146271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-09 12:40:05 ± 0.09
Latitude 43.4967 ± 0.0018
Longitude 12.2852 ± 0.0025
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 116029571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 270
Semi-minor axis of confidence ellipse (meter) 45
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 42
Circular confidence region, given by single value of horizontal uncertainty (meter) 270.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.03238
Epicentral distance of station farthest from the epicenter (degree) 0.27070
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 116029571
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-04-03 16:33:11

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 115146271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-09 12:46:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRE.HHZ. 2023-03-09T12:40:16.59 0.6 undecidable manual S 297 30.0477 107 0.14 47
IV.NARO.HHN. 2023-03-09T12:40:14.94 0.6 undecidable manual S 62 26.9508 108 -0.47 44
IV.ATLO.EHE. 2023-03-09T12:40:13.85 0.6 undecidable manual S 154 22.3554 112 -0.09 48
IV.PIEI.HHZ. 2023-03-09T12:40:13.29 0.6 undecidable manual S 78 20.5683 114 -0.06 48
IV.ATBU.EHZ. 2023-03-09T12:40:13.91 0.6 undecidable manual S 96 21.2676 113 0.32 46
IV.TSM2.DHN. 2023-03-09T12:40:13.08 0.6 undecidable manual S 124 19.869 114 -0.06 48
IV.ATVA.EHE. 2023-03-09T12:40:13.84 0.6 undecidable manual S 180 24.1536 110 -0.68 41
IV.ATMI.HHZ. 2023-03-09T12:40:12.74 0.6 undecidable manual S 184 18.0708 116 0.17 47
IV.TB01.DHZ. 2023-03-09T12:40:12.57 0.6 undecidable manual S 136 17.5713 117 0.15 48
IV.TB02.DHZ. 2023-03-09T12:40:12.68 0.6 undecidable manual S 144 17.1717 118 0.38 45
IV.ATVO.HHZ. 2023-03-09T12:40:12.05 0.6 undecidable manual S 142 16.0728 119 0.11 48
IV.PARC.HHZ. 2023-03-09T12:40:12.47 0.3 undecidable manual S 347 17.2716 117 0.15 71
IV.ATPC.HHE. 2023-03-09T12:40:11.36 0.6 undecidable manual S 97 13.9749 123 0.04 49
IV.NARO.HHN. 2023-03-09T12:40:11.05 0.1 undecidable manual P 62 26.9508 108 -0.2 93
IV.TB03.DHZ. 2023-03-09T12:40:11.60 0.6 undecidable manual S 136 14.5743 122 0.09 48
IV.CRE.HHZ. 2023-03-09T12:40:11.84 0.6 undecidable manual P 297 30.0477 107 -0.01 48
IV.ATVA.EHE. 2023-03-09T12:40:10.47 0.1 undecidable manual P 180 24.1536 110 -0.27 92
IV.ATPI.EHZ. 2023-03-09T12:40:10.26 0.6 undecidable manual S 118 10.6782 130 -0.15 48
IV.ATLO.EHE. 2023-03-09T12:40:10.41 0.1 undecidable manual P 154 22.3554 112 0.01 97
IV.PIEI.HHZ. 2023-03-09T12:40:10.13 1.0 negative manual P 78 20.5683 114 0.07 24
IV.ATBU.EHZ. 2023-03-09T12:40:10.09 0.1 undecidable manual P 96 21.2676 113 -0.11 95
IV.PARC.HHZ. 2023-03-09T12:40:09.64 0.6 negative manual P 347 17.2716 117 0.17 47
IV.TB03.DHZ. 2023-03-09T12:40:09.09 0.1 undecidable manual P 136 14.5743 122 0.09 97
IV.ATMI.HHZ. 2023-03-09T12:40:09.65 0.6 positive manual P 184 18.0708 116 0.04 49
IV.TB01.DHZ. 2023-03-09T12:40:09.59 0.1 undecidable manual P 136 17.5713 117 0.06 97
IV.TB02.DHZ. 2023-03-09T12:40:09.60 0.1 undecidable manual P 144 17.1717 118 0.15 95
IV.ATMC.EHE. 2023-03-09T12:40:09.94 0.6 undecidable manual S 233 9.2796 134 -0.1 49
IV.ATVO.HHZ. 2023-03-09T12:40:09.37 0.3 negative manual P 142 16.0728 119 0.12 72
IV.TSM2.DHN. 2023-03-09T12:40:09.83 0.1 undecidable manual P 124 19.869 114 -0.11 95
IV.BADI.EHZ. 2023-03-09T12:40:08.59 0.6 undecidable manual S 294 3.5964 158 -0.33 47
IV.ATMC.EHE. 2023-03-09T12:40:08.26 0.1 undecidable manual P 233 9.2796 134 0.11 97
IV.ATPI.EHZ. 2023-03-09T12:40:08.41 0.1 negative manual P 118 10.6782 130 0.04 98
IV.ATPC.HHE. 2023-03-09T12:40:08.98 0.1 undecidable manual P 97 13.9749 123 0.09 97
IV.BADI.EHZ. 2023-03-09T12:40:07.52 0.1 undecidable manual P 294 3.5964 158 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATPI.EHE. ML:1.0 0.0001285 0.12 AML other m 2023-03-09T12:40:10.35
IV.ATPI.EHN. ML:1.0 0.00012940000000000003 0.18 AML other m 2023-03-09T12:40:10.34
IV.ATVO.HHN. ML:1.5 0.0002785 0.28 AML other m 2023-03-09T12:40:12.71
IV.ATVO.HHE. ML:1.3 0.000199 1.26 AML other m 2023-03-09T12:40:12.83
IV.PARC.HHE. ML:1.4 0.00020700000000000002 1.72 AML other m 2023-03-09T12:40:12.91
IV.PARC.HHN. ML:1.2 0.00013800000000000002 1.76 AML other m 2023-03-09T12:40:13.88
IV.ATMI.HHE. ML:1.3 0.000157 1.02 AML other m 2023-03-09T12:40:13.06
IV.ATMI.HHN. ML:1.1 0.00009635 0.46 AML other m 2023-03-09T12:40:13.49
IV.PIEI.HHN. ML:0.9 0.000060049999999999996 0.94 AML other m 2023-03-09T12:40:13.29
IV.PIEI.HHE. ML:1.1 0.00009675000000000001 0.88 AML other m 2023-03-09T12:40:14.64
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