Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 28-08-2023 and time 06:49:19 (Italy) in region 5 km NE Città di Castello (PG)

A magnitude ML 0.8 earthquake occured in region: 5 km NE Città di Castello (PG), on

  • 28-08-2023 04:49:19 (UTC)
  • 28-08-2023 06:49:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5040, 12.2640 at 6 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 9 11297 51210
Monte Santa Maria Tiberina PG 11 1183 52393
Citerna PG 12 3531 55924
Sansepolcro AR 12 15884 71808
Monterchi AR 12 1757 73565
Apecchio PU 14 1882 75447
Pietralunga PG 16 2111 77558
Montone PG 16 1680 79238
Mercatello sul Metauro PU 17 1378 80616
Anghiari AR 17 5638 86254
Borgo Pace PU 17 606 86860

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km E of Arezzo (99543 inhabitants)
45 Km N of Perugia (166134 inhabitants)
67 Km SW of Rimini (147750 inhabitants)
69 Km SW of Pesaro (94582 inhabitants)
70 Km S of Cesena (96758 inhabitants)
71 Km NW of Foligno (57155 inhabitants)
72 Km SW of Fano (60888 inhabitants)
78 Km E of Siena (53903 inhabitants)
82 Km S of Forlì (117913 inhabitants)
86 Km E of Firenze (382808 inhabitants)
92 Km E of Scandicci (50609 inhabitants)
92 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 0.8 2023-08-28
04:49:19		 43.5042 12.2642 6 2023-08-28
05:02:28		 Sala Sismica INGV-Roma 120535101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-28 04:49:19 ± 0.11
Latitude 43.5042 ± 0.0045
Longitude 12.2642 ± 0.0074
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 120535101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 504
Semi-minor axis of confidence ellipse (meter) 410
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 276
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 193
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.30667
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 15
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 120535101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-08-28 05:02:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATFO.HHZ. 2023-08-28T04:49:27.75 0.6 undecidable manual S -0.17 0.93
IV.TSM5.DHZ.10 2023-08-28T04:49:27.21 3.0 undecidable manual P 0
IV.TB02.DHZ.01 2023-08-28T04:49:26.01 0.3 undecidable manual S 142 18.87 107 -0.05 78
IV.MURB.HNZ. 2023-08-28T04:49:26.36 0.3 undecidable manual P 142 34.0437 100 0.24 73
IV.CAFI.HHZ. 2023-08-28T04:49:25.34 0.3 undecidable manual P 231 30.8469 101 -0.16 75
IV.TB03.DHZ.01 2023-08-28T04:49:25.39 0.3 undecidable manual S 134 16.3725 109 0.15 77
IV.NARO.HHZ. 2023-08-28T04:49:24.72 0.3 undecidable manual P 65 28.0497 102 -0.23 74
IV.TSM3.DHZ.01 2023-08-28T04:49:24.84 0.3 undecidable manual S 151 15.3735 111 -0.05 79
IV.TB02.DHZ.01 2023-08-28T04:49:23.15 0.3 undecidable manual P 142 18.87 107 -0.02 79
IV.ATMI.HHZ. 2023-08-28T04:49:23.41 0.3 negative manual P 0.14 1.4
IV.TB01.DHZ.01 2023-08-28T04:49:23.22 0.3 undecidable manual P 135 19.3695 107 -0.04 78
IV.TSM2.DHZ.01 2023-08-28T04:49:23.53 0.3 undecidable manual P 123 21.7671 105 -0.19 76
IV.PIEI.HHZ. 2023-08-28T04:49:23.65 0.3 undecidable manual P 81 22.0668 105 -0.13 77
IV.ATVO.HHZ. 2023-08-28T04:49:22.33 1.0 undecidable manual P -0.24 0.47
IV.TSM3.DHZ.01 2023-08-28T04:49:22.53 0.3 undecidable manual P 151 15.3735 111 0.04 79
IV.TB03.DHZ.01 2023-08-28T04:49:22.68 0.3 undecidable manual P 134 16.3725 109 -0.01 79
IV.APEC.HHZ. 2023-08-28T04:49:22.53 0.1 positive manual P -0.05 1.87
IV.TSM6.DHZ.01 2023-08-28T04:49:22.10 0.3 undecidable manual S 123 6.5934 131 -0.14 79
IV.TSM6.DHZ.01 2023-08-28T04:49:21.08 0.3 undecidable manual P 123 6.5934 131 0.12 79
IV.ATPI.EHZ. 2023-08-28T04:49:21.99 0.6 undecidable manual P 0.01 0.93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PIEI.HHN. ML:0.7 0.0000395 0.74 AML other m 2023-08-28T04:49:27.14
IV.PIEI.HHE. ML:0.9 0.00005865 0.96 AML other m 2023-08-28T04:49:28.80
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