Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 12-03-2023 and time 18:20:11 (UTC) in region 6 km N Città di Castello (PG)

A magnitude ML 1.0 earthquake occured in region: 6 km N Città di Castello (PG), on

  • 12-03-2023 18:20:11 (UTC)
  • 12-03-2023 19:20:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.5100, 12.2320 at 7 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 6 11297 51210
Citerna PG 9 3531 54741
Monte Santa Maria Tiberina PG 10 1183 55924
Sansepolcro AR 10 15884 71808
Monterchi AR 10 1757 73565
Anghiari AR 15 5638 79203
Apecchio PU 16 1882 81085
Borgo Pace PU 17 606 81691
Mercatello sul Metauro PU 18 1378 83069
Montone PG 18 1680 84749
Pietralunga PG 18 2111 86860

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km E of Arezzo (99543 inhabitants)
47 Km N of Perugia (166134 inhabitants)
67 Km SW of Rimini (147750 inhabitants)
70 Km S of Cesena (96758 inhabitants)
71 Km SW of Pesaro (94582 inhabitants)
73 Km NW of Foligno (57155 inhabitants)
74 Km SW of Fano (60888 inhabitants)
76 Km E of Siena (53903 inhabitants)
81 Km S of Forlì (117913 inhabitants)
84 Km E of Firenze (382808 inhabitants)
89 Km E of Scandicci (50609 inhabitants)
91 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
Reviewed
Rev100 		ML 1.0 2023-03-12
18:20:11		 43.51 12.2322 7 2023-03-12
18:31:18		 Sala Sismica INGV-Roma 115291841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-12 18:20:11 ± 0.1
Latitude 43.5100 ± 0.0027
Longitude 12.2322 ± 0.0037
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 115291841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 360
Semi-minor axis of confidence ellipse (meter) 45
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 319
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
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) 0.00899
Epicentral distance of station farthest from the epicenter (degree) 0.27160
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 2
Type of magnitude ML
Reference to an origin 115291841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-12 18:31:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAFI.HHZ. 2023-03-12T18:20:21.37 0.3 undecidable manual S 227 29.3484 103 -0.21 70
IV.NARO.HHZ. 2023-03-12T18:20:21.36 0.3 undecidable manual S 68 30.1476 103 -0.49 66
IV.PIEI.HHZ. 2023-03-12T18:20:20.20 0.3 undecidable manual S 83 24.5532 105 0.25 70
IV.ATPC.HHN. 2023-03-12T18:20:18.21 0.6 undecidable manual S 100 18.3705 110 0.29 47
IV.ATVO.HHZ. 2023-03-12T18:20:18.42 0.3 undecidable manual S 135 19.9689 109 -0.02 74
IV.ATMI.HHZ. 2023-03-12T18:20:18.40 0.3 undecidable manual S 172 19.7691 109 0.04 74
IV.PARC.HHZ. 2023-03-12T18:20:17.04 0.3 undecidable manual S 2 15.3735 114 0.08 74
IV.APEC.HHE. 2023-03-12T18:20:17.45 0.3 undecidable manual S 70 16.0728 113 0.29 71
IV.NARO.HHZ. 2023-03-12T18:20:17.01 0.1 undecidable manual P 68 30.1476 103 -0.31 92
IV.CRE.HHZ. 2023-03-12T18:20:16.92 0.3 undecidable manual P 298 25.5522 105 0.5 67
IV.ATPI.EHZ. 2023-03-12T18:20:16.79 0.3 undecidable manual S 116 15.1737 114 -0.11 74
IV.CAFI.HHZ. 2023-03-12T18:20:16.90 0.1 undecidable manual P 227 29.3484 103 -0.26 93
IV.PIEI.HHZ. 2023-03-12T18:20:16.03 0.3 undecidable manual P 83 24.5532 105 -0.19 71
IV.ATMI.HHZ. 2023-03-12T18:20:15.23 0.3 undecidable manual P 172 19.7691 109 -0.08 73
IV.ATPC.HHN. 2023-03-12T18:20:15.20 0.6 undecidable manual P 100 18.3705 110 0.15 48
IV.ATVO.HHZ. 2023-03-12T18:20:15.47 0.1 undecidable manual P 135 19.9689 109 0.12 97
IV.PARC.HHZ. 2023-03-12T18:20:14.47 0.1 positive manual P 2 15.3735 114 -0.02 100
IV.APEC.HHE. 2023-03-12T18:20:14.72 0.3 undecidable manual P 70 16.0728 113 0.11 73
IV.CDCA.HNE. 2023-03-12T18:20:14.57 0.6 undecidable manual S 179 5.6943 140 0.37 47
IV.ATMC.EHN. 2023-03-12T18:20:14.72 0.3 undecidable manual S 204 7.6812 131 0.04 76
IV.ATPI.EHZ. 2023-03-12T18:20:14.47 0.1 undecidable manual P 116 15.1737 114 0.01 100
IV.BADI.EHZ. 2023-03-12T18:20:13.21 0.1 undecidable manual S 92 0.999 172 -0.29 97
IV.CDCA.HNE. 2023-03-12T18:20:13.04 0.3 undecidable manual P 179 5.6943 140 0.14 74
IV.ATMC.EHN. 2023-03-12T18:20:13.26 0.1 undecidable manual P 204 7.6812 131 0.08 100
IV.BADI.EHZ. 2023-03-12T18:20:12.43 0.3 undecidable manual P 92 0.999 172 -0.07 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PARC.HHE. ML:1.1 0.0001215 0.82 AML other m 2023-03-12T18:20:17.48
IV.PARC.HHN. ML:0.8 0.00007099999999999999 0.82 AML other m 2023-03-12T18:20:17.06
IV.BADI.EHE. ML:0.0 0.00050047705 0.1664 AML other m 2023-03-12T18:20:13.84
IV.BADI.EHN. ML:0.0 0.00066398055 0.1664 AML other m 2023-03-12T18:20:13.25
IV.ATPI.EHE. ML:0.0 0.000026241964999999998 0.1024 AML other m 2023-03-12T18:20:17.44
IV.ATPI.EHN. ML:0.0 0.00002340288 0.3456 AML other m 2023-03-12T18:20:19.61
IV.ATMI.HHE. ML:0.0 0.00003337336 0.1152 AML other m 2023-03-12T18:20:18.73
IV.ATMI.HHN. ML:0.0 0.000030075011499999997 0.0896 AML other m 2023-03-12T18:20:18.68
IV.ATVO.HHE. ML:0.0 0.0000474818 5.824 AML other m 2023-03-12T18:20:19.60
IV.ATVO.HHN. ML:0.0 0.0000339444 1.7792 AML other m 2023-03-12T18:20:19.14
IV.PIEI.HHE. ML:0.0 0.000032954945 0.1408 AML other m 2023-03-12T18:20:20.60
IV.PIEI.HHN. ML:0.0 0.000020566179999999998 0.1792 AML other m 2023-03-12T18:20:20.98
IV.CAFI.HHE. ML:0.0 0.00001229272995 0.1152 AML other m 2023-03-12T18:20:23.30
IV.CAFI.HHN. ML:0.0 0.0000121119765 0.2944 AML other m 2023-03-12T18:20:22.43
IV.NARO.HHE. ML:0.0 0.000014310953499999998 0.064 AML other m 2023-03-12T18:20:21.86
IV.NARO.HHN. ML:0.0 0.000018664154500000002 0.0512 AML other m 2023-03-12T18:20:21.66
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