Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 30-12-2022 and time 02:35:36 (UTC) in region 8 km N Sansepolcro (AR)

A magnitude ML 0.4 earthquake occured in region: 8 km N Sansepolcro (AR), on

  • 30-12-2022 02:35:36 (UTC)
  • 30-12-2022 03:35:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.6390, 12.1430 at 10 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
Sansepolcro AR 8 15884 15884
Badia Tedalda AR 8 1087 16971
Pieve Santo Stefano AR 9 3183 20154
San Giustino PG 10 11297 31451
Borgo Pace PU 12 606 32057
Caprese Michelangelo AR 13 1426 33483
Anghiari AR 13 5638 39121
Sestino AR 15 1355 40476
Mercatello sul Metauro PU 16 1378 41854
Citerna PG 16 3531 45385
Casteldelci RN 17 407 45792
Monterchi AR 17 1757 47549
Chiusi della Verna AR 18 2023 49572

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NE of Arezzo (99543 inhabitants)
56 Km S of Cesena (96758 inhabitants)
58 Km SW of Rimini (147750 inhabitants)
62 Km NW of Perugia (166134 inhabitants)
66 Km S of Forlì (117913 inhabitants)
69 Km W of Pesaro (94582 inhabitants)
73 Km E of Firenze (382808 inhabitants)
74 Km W of Fano (60888 inhabitants)
75 Km E of Siena (53903 inhabitants)
75 Km S of Faenza (58541 inhabitants)
78 Km E of Scandicci (50609 inhabitants)
87 Km SE of Imola (69797 inhabitants)
87 Km S of Ravenna (159116 inhabitants)
88 Km E of Prato (191150 inhabitants)
89 Km NW of Foligno (57155 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 0.4 2022-12-30
02:35:36		 43.6393 12.1433 10 2024-03-01
15:28:19		 Bollettino Sismico Italiano INGV 114836141
Reviewed
Rev100 		ML 0.7 2022-12-30
02:35:35		 43.6458 12.1357 10 2022-12-30
03:52:39		 Sala Sismica INGV-Roma 113181251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-12-30 02:35:36 ± 0.07
Latitude 43.6393 ± 0.0045
Longitude 12.1433 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 114836141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 493
Semi-minor axis of confidence ellipse (meter) 299
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 185
Circular confidence region, given by single value of horizontal uncertainty (meter) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.54139
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 114836141
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-02-26 23:03:00

ML:0.7

Field Value
Value 0.7
Uncertainty 0.0
Num. used stations 2
Type of magnitude ML
Reference to an origin 113181251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-12-30 03:52:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OX.SABO.HNZ. 2022-12-30T02:36:23.08 3.0 undecidable manual Sn -0.24 0
IV.VMGN.HHN. 2022-12-30T02:35:55.42 0.6 undecidable manual S 306 60.0954 50 0.46 42
IV.NARO.HHZ. 2022-12-30T02:35:48.29 0.3 undecidable manual S 95 35.2425 50 -0.04 72
IV.SFI.EHZ. 2022-12-30T02:35:48.89 3.0 undecidable manual P 0
IV.CAFI.HNN. 2022-12-30T02:35:48.95 0.6 undecidable manual S 203 37.2294 50 0.09 47
IV.PIEI.HHE. 2022-12-30T02:35:47.78 0.6 undecidable manual S 110 33.5442 50 -0.08 48
IV.VMGN.HHN. 2022-12-30T02:35:47.08 0.6 undecidable manual P 306 60.0954 50 0.06 46
IV.APEC.HNZ. 2022-12-30T02:35:45.59 0.6 undecidable manual S 112 23.9538 112 0.45 45
IV.ATMC.EHZ. 2022-12-30T02:35:44.24 0.6 undecidable manual S 169 21.7671 114 -0.19 48
IV.NARO.HHZ. 2022-12-30T02:35:43.02 0.1 undecidable manual P 95 35.2425 50 -0.17 93
IV.CAFI.HNN. 2022-12-30T02:35:43.53 0.3 undecidable manual P 203 37.2294 50 0.04 72
IV.BADI.EHZ. 2022-12-30T02:35:43.01 0.6 undecidable manual S 151 16.5723 121 0.19 48
IV.PIEI.HHE. 2022-12-30T02:35:42.60 0.3 undecidable manual P 110 33.5442 50 -0.32 68
IV.CRE.HHZ. 2022-12-30T02:35:42.40 0.3 undecidable manual S 262 15.5733 122 -0.13 73
IV.RIBO.EHZ.01 2022-12-30T02:35:42.25 3.0 undecidable manual Pn -1.53 0
IV.APEC.HNZ. 2022-12-30T02:35:41.58 0.3 undecidable manual P 112 23.9538 112 0.23 70
IV.PARC.HHZ. 2022-12-30T02:35:40.27 0.3 undecidable manual S 82 7.6812 142 -0.21 73
IV.BADI.EHZ. 2022-12-30T02:35:40.16 0.1 undecidable manual P 151 16.5723 121 0.15 97
IT.SNS1.HNZ. 2022-12-30T02:35:40.67 0.6 undecidable manual S 188 7.3815 143 0.26 48
IV.SSP9.EHZ. 2022-12-30T02:35:40.28 0.3 undecidable manual S 188 7.3815 143 -0.12 74
IV.ATMC.EHZ. 2022-12-30T02:35:40.71 0.6 undecidable manual P 169 21.7671 114 -0.23 47
IV.CRE.HHZ. 2022-12-30T02:35:39.75 0.1 undecidable manual P 262 15.5733 122 -0.09 98
IV.PARC.HHZ. 2022-12-30T02:35:38.72 0.1 undecidable manual P 82 7.6812 142 0.06 100
IT.SNS1.HNZ. 2022-12-30T02:35:38.18 0.6 undecidable manual P 188 7.3815 143 -0.43 46
IV.SSP9.EHZ. 2022-12-30T02:35:38.79 0.1 undecidable manual P 188 7.3815 143 0.18 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PARC.HHN. ML:0.6 0.00006720000000000001 0.24 AML other m 2022-12-30T02:35:40.34
IV.PARC.HHE. ML:0.6 0.0000577 0.4 AML other m 2022-12-30T02:35:40.51
IV.CRE.HHE. ML:0.2 0.000016786407999999998 0.3808 AML other m 2022-12-30T02:35:45.22
IV.CRE.HHN. ML:0.2 0.000015050395999999998 0.2592 AML other m 2022-12-30T02:35:42.72
IV.BADI.EHN. ML:0.4 0.000020018380000000003 0.0784 AML other m 2022-12-30T02:35:43.05
IV.BADI.EHE. ML:0.4 0.00002678341 0.1008 AML other m 2022-12-30T02:35:43.33
IV.NARO.HHN. ML:0.4 0.000008794676000000002 0.08 AML other m 2022-12-30T02:35:49.11
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