Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.2 on date 12-03-2021 and time 08:22:54 (Italy) in region 3 km SW Sansepolcro (AR)

A magnitude ML 0.2 earthquake occured in region: 3 km SW Sansepolcro (AR), on

  • 12-03-2021 07:22:54 (UTC)
  • 12-03-2021 08:22:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.5500, 12.1120 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
Anghiari AR 5 5638 21522
San Giustino PG 5 11297 32819
Citerna PG 6 3531 36350
Monterchi AR 7 1757 38107
Monte Santa Maria Tiberina PG 13 1183 39290
Pieve Santo Stefano AR 14 3183 42473
Città di Castello PG 15 39913 82386
Caprese Michelangelo AR 15 1426 83812
Badia Tedalda AR 19 1087 84899
Borgo Pace PU 19 606 85505
Subbiano AR 20 6331 91836

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km E of Arezzo (99543 inhabitants)
54 Km NW of Perugia (166134 inhabitants)
66 Km S of Cesena (96758 inhabitants)
68 Km SW of Rimini (147750 inhabitants)
68 Km E of Siena (53903 inhabitants)
73 Km E of Firenze (382808 inhabitants)
75 Km S of Forlì (117913 inhabitants)
76 Km SW of Pesaro (94582 inhabitants)
78 Km E of Scandicci (50609 inhabitants)
80 Km W of Fano (60888 inhabitants)
82 Km NW of Foligno (57155 inhabitants)
84 Km S of Faenza (58541 inhabitants)
89 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 0.2 2021-03-12
07:22:54		 43.5502 12.112 7 2021-03-12
07:31:45		 Sala Sismica INGV-Roma 88028191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-12 07:22:54 ± 0.08
Latitude 43.5502 ± 0.0018
Longitude 12.1120 ± 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 88028191

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 237
Semi-minor axis of confidence ellipse (meter) 132
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 273
Circular confidence region, given by single value of horizontal uncertainty (meter) 240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.24462
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.2

Field Value
Value 0.2
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 88028191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-12 07:31:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCIV.CHZ. 2021-03-12T07:23:08.32 3.0 undecidable manual S -0.04 0
IV.IMOL.HNZ. 2021-03-12T07:23:06.09 3.0 negative manual P 0.03 0
IV.CAFI.HHN. 2021-03-12T07:23:04.56 0.3 undecidable manual S 206 27.1506 105 -0.06 72
IV.CRE.HHZ. 2021-03-12T07:23:00.65 0.3 undecidable manual S 301 14.9739 115 0.03 74
IV.CAFI.HHN. 2021-03-12T07:23:00.50 0.3 undecidable manual P 206 27.1506 105 0 73
IV.PARC.HHZ. 2021-03-12T07:23:00.43 0.3 undecidable manual S 43 14.874 116 -0.18 72
IV.BADI.EHZ. 2021-03-12T07:22:59.61 0.6 undecidable manual S 113 11.5773 122 0.03 50
IV.ATMC.EHN. 2021-03-12T07:22:59.97 0.1 undecidable manual S 150 13.1757 118 -0.1 98
IV.PARC.HHZ. 2021-03-12T07:22:58.19 0.1 undecidable manual P 43 14.874 116 0 99
IV.CRE.HHZ. 2021-03-12T07:22:58.15 0.3 undecidable manual P 301 14.9739 115 -0.04 74
IV.SSP9.EHZ. 2021-03-12T07:22:57.42 0.3 undecidable manual S 31 3.0969 157 -0.14 74
IT.SNS1.HNE. 2021-03-12T07:22:57.73 0.3 undecidable manual S 31 2.997 157 0.17 74
IV.BADI.EHZ. 2021-03-12T07:22:57.77 0.1 undecidable manual P 113 11.5773 122 0.18 97
IV.ATMC.EHN. 2021-03-12T07:22:57.90 0.3 undecidable manual P 150 13.1757 118 0.03 74
IT.SNS1.HNE. 2021-03-12T07:22:56.56 0.1 undecidable manual P 31 2.997 157 0.14 99
IV.SSP9.EHZ. 2021-03-12T07:22:56.35 0.1 undecidable manual P 31 3.0969 157 -0.08 100
IV.OSSC.HNZ. 2021-03-12T07:22:53.20 3.0 undecidable manual P 1.14 0
IV.CSNT.HHZ. 2021-03-12T07:22:50.78 3.0 undecidable manual P -0.12 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSP9.EHE. ML:0.0 0.0002231894 0.2016 AML other m 2021-03-12T07:22:58.33
IV.SSP9.EHN. ML:0.0 0.000128772555 0.1376 AML other m 2021-03-12T07:22:57.64
IV.BADI.EHE. ML:0.2 0.000021767681 0.16 AML other m 2021-03-12T07:23:00.38
IV.BADI.EHN. ML:0.2 0.0000178096375 0.2208 AML other m 2021-03-12T07:23:01.08
IV.PARC.HHE. ML:0.3 0.0000177423695 0.1408 AML other m 2021-03-12T07:23:00.60
IV.PARC.HHN. ML:0.3 0.0000216833105 1.5584 AML other m 2021-03-12T07:23:00.00
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