Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 18-01-2023 and time 23:28:29 (UTC) in region 3 km SW Sansepolcro (AR)

A magnitude ML 0.5 earthquake occured in region: 3 km SW Sansepolcro (AR), on

  • 18-01-2023 23:28:29 (UTC)
  • 19-01-2023 00:28:29 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.5490, 12.1280 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
Sansepolcro AR 3 15884 15884
San Giustino PG 4 11297 27181
Citerna PG 6 3531 30712
Anghiari AR 6 5638 36350
Monterchi AR 7 1757 38107
Monte Santa Maria Tiberina PG 13 1183 39290
Città di Castello PG 14 39913 79203
Pieve Santo Stefano AR 15 3183 82386
Caprese Michelangelo AR 16 1426 83812
Borgo Pace PU 18 606 84418
Badia Tedalda AR 18 1087 85505

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km E of Arezzo (99543 inhabitants)
53 Km NW of Perugia (166134 inhabitants)
66 Km S of Cesena (96758 inhabitants)
67 Km SW of Rimini (147750 inhabitants)
69 Km E of Siena (53903 inhabitants)
74 Km E of Firenze (382808 inhabitants)
75 Km SW of Pesaro (94582 inhabitants)
75 Km S of Forlì (117913 inhabitants)
79 Km W of Fano (60888 inhabitants)
80 Km E of Scandicci (50609 inhabitants)
81 Km NW of Foligno (57155 inhabitants)
84 Km S of Faenza (58541 inhabitants)
91 Km E of Prato (191150 inhabitants)
95 Km SE of Imola (69797 inhabitants)
97 Km S of Ravenna (159116 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 0.5 2023-01-18
23:28:29		 43.549 12.1282 7 2023-01-18
23:38:16		 Sala Sismica INGV-Roma 113669371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-01-18 23:28:29 ± 0.09
Latitude 43.5490 ± 0.0027
Longitude 12.1282 ± 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 113669371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 278
Semi-minor axis of confidence ellipse (meter) 103
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 219
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 24
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.25271
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 12
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 113669371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-01-18 23:38:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSNT.HHZ. 2023-01-18T23:28:48.21 3.0 undecidable manual P 0
IV.CAFI.HHZ. 2023-01-18T23:28:39.18 0.3 undecidable manual S 208 27.6501 105 -0.02 72
IV.ATPC.HNZ. 2023-01-18T23:28:39.27 0.3 undecidable manual S 106 27.5502 105 0.12 71
IV.ATMI.HHZ. 2023-01-18T23:28:38.74 0.3 undecidable manual S 155 26.3514 105 -0.03 72
IV.TB03.DHZ.01 2023-01-18T23:28:38.86 0.1 undecidable manual S 126 28.0497 104 -0.46 87
IV.ATPI.EHZ. 2023-01-18T23:28:38.00 0.3 undecidable manual S 116 24.5532 106 -0.18 70
IV.APEC.HNZ. 2023-01-18T23:28:37.91 0.3 undecidable manual S 87 23.4543 107 0.1 71
IV.TB03.DHZ.01 2023-01-18T23:28:35.02 0.1 undecidable manual P 126 28.0497 104 -0.06 95
IV.CAFI.HHZ. 2023-01-18T23:28:35.00 0.1 undecidable manual P 208 27.6501 105 -0.01 96
IV.CRE.HHZ. 2023-01-18T23:28:35.40 0.3 undecidable manual S 299 16.1727 114 -0.03 73
IV.ATPC.HNZ. 2023-01-18T23:28:35.16 0.3 undecidable manual P 106 27.5502 105 0.17 70
IV.ATMI.HHZ. 2023-01-18T23:28:34.82 0.1 undecidable manual P 155 26.3514 105 0.06 95
IV.PARC.HHZ. 2023-01-18T23:28:34.71 0.3 undecidable manual S 39 14.1747 117 -0.09 73
IV.ATPI.EHZ. 2023-01-18T23:28:34.29 0.3 undecidable manual P 116 24.5532 106 -0.14 71
IV.CDCA.HNZ. 2023-01-18T23:28:34.72 0.6 undecidable manual S 140 13.1757 119 0.23 47
IV.ATMC.EHZ. 2023-01-18T23:28:34.35 0.3 undecidable manual S 155 12.4764 120 0.07 73
IV.APEC.HNZ. 2023-01-18T23:28:34.18 0.3 undecidable manual P 87 23.4543 107 -0.03 72
IV.BADI.EHZ. 2023-01-18T23:28:33.93 0.3 undecidable manual S 115 10.2786 125 0.28 70
IV.CRE.HHZ. 2023-01-18T23:28:32.86 0.1 undecidable manual P 299 16.1727 114 0.03 98
IV.ATMC.EHZ. 2023-01-18T23:28:32.28 0.3 undecidable manual P 155 12.4764 120 0.11 73
IV.BADI.EHZ. 2023-01-18T23:28:32.06 0.1 undecidable manual P 115 10.2786 125 0.26 94
IV.PARC.HHZ. 2023-01-18T23:28:32.52 0.1 undecidable manual P 39 14.1747 117 0.05 98
IV.SSP9.EHZ. 2023-01-18T23:28:31.73 0.3 undecidable manual S 5 2.7972 159 -0.23 72
IV.CDCA.HNZ. 2023-01-18T23:28:31.91 0.6 undecidable manual P 140 13.1757 119 -0.38 46
IV.SSP9.EHZ. 2023-01-18T23:28:30.86 0.1 undecidable manual P 5 2.7972 159 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSP9.EHE. ML:0.0 0.000456846 0 AML other m 2023-01-18T23:28:32.15
IV.SSP9.EHN. ML:0.0 0.00062819975 0.1536 AML other m 2023-01-18T23:28:32.20
IV.BADI.EHE. ML:0.6 0.000054072145 0.1152 AML other m 2023-01-18T23:28:34.48
IV.BADI.EHN. ML:0.4 0.000038354565 0.1152 AML other m 2023-01-18T23:28:34.02
IV.PARC.HHE. ML:0.6 0.000047434514999999996 0.2176 AML other m 2023-01-18T23:28:36.28
IV.PARC.HHN. ML:0.7 0.00005659749500000001 0.1536 AML other m 2023-01-18T23:28:35.96
IV.CRE.HHE. ML:0.3 0.0000187478075 0.1792 AML other m 2023-01-18T23:28:36.70
IV.CRE.HHN. ML:0.5 0.00003188586 0.1536 AML other m 2023-01-18T23:28:36.54
IV.ATMI.HHE. ML:0.7 0.0000313856565 0.1792 AML other m 2023-01-18T23:28:38.91
IV.ATMI.HHN. ML:0.5 0.000021734955 0.1536 AML other m 2023-01-18T23:28:38.96
IV.CAFI.HHE. ML:0.4 0.000017434604999999998 0.128 AML other m 2023-01-18T23:28:40.14
IV.CAFI.HHN. ML:0.4 0.0000172015375 0.128 AML other m 2023-01-18T23:28:40.26
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