Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 28-11-2021 and time 03:00:50 (UTC) in region 5 km N Anghiari (AR)

A magnitude ML 1.0 earthquake occured in region: 5 km N Anghiari (AR), on

  • 28-11-2021 03:00:50 (UTC)
  • 28-11-2021 04:00:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.5840, 12.0670 at 10 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
Anghiari AR 5 5638 5638
Sansepolcro AR 6 15884 21522
Caprese Michelangelo AR 9 1426 22948
Pieve Santo Stefano AR 10 3183 26131
San Giustino PG 10 11297 37428
Citerna PG 10 3531 40959
Monterchi AR 11 1757 42716
Subbiano AR 16 6331 49047
Capolona AR 17 5438 54485
Chiusi della Verna AR 17 2023 56508
Badia Tedalda AR 17 1087 57595
Chitignano AR 17 899 58494
Monte Santa Maria Tiberina PG 18 1183 59677
Arezzo AR 20 99543 159220
Città di Castello PG 20 39913 199133

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NE of Arezzo (99543 inhabitants)
59 Km NW of Perugia (166134 inhabitants)
63 Km S of Cesena (96758 inhabitants)
66 Km E of Siena (53903 inhabitants)
67 Km SW of Rimini (147750 inhabitants)
68 Km E of Firenze (382808 inhabitants)
71 Km S of Forlì (117913 inhabitants)
74 Km E of Scandicci (50609 inhabitants)
77 Km W of Pesaro (94582 inhabitants)
80 Km S of Faenza (58541 inhabitants)
82 Km W of Fano (60888 inhabitants)
85 Km E of Prato (191150 inhabitants)
87 Km NW of Foligno (57155 inhabitants)
90 Km SE of Imola (69797 inhabitants)
93 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 		Md 1.2
ML 1.0 		2021-11-28
03:00:50		 43.5837 12.0673 10 2021-11-28
03:05:38		 Sala Sismica INGV-Roma 97889661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-28 03:00:50 ± 0.08
Latitude 43.5837 ± 0.0045
Longitude 12.0673 ± 0.0050
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97889661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 525
Semi-minor axis of confidence ellipse (meter) 362
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 17
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 129
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 0.27699
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 97889661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-28 03:05:38

Md:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 8
Type of magnitude Md
Reference to an origin 97889661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-28 03:05:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATPI.EHZ. 2021-11-28T03:01:01.38 0.6 undecidable manual S 119 30.747 50 -0.05 49
IV.CAFI.HHZ. 2021-11-28T03:01:01.04 0.6 undecidable manual S 196 29.3484 50 -0.04 49
IV.ATMC.EHZ. 2021-11-28T03:00:57.53 0.6 undecidable manual S 146 18.2706 118 -0.11 49
IV.BADI.EHZ. 2021-11-28T03:00:57.18 0.6 undecidable manual S 120 16.4724 121 0.08 50
IV.ATPI.EHZ. 2021-11-28T03:00:56.12 1.0 undecidable manual P 119 30.747 50 -0.68 21
IV.PARC.HHZ. 2021-11-28T03:00:56.65 0.6 undecidable manual S 62 15.4734 122 -0.18 49
IV.CAFI.HHZ. 2021-11-28T03:00:56.72 1.0 positive manual P 196 29.3484 50 0.12 24
IV.CRE.HHZ. 2021-11-28T03:00:55.09 0.6 undecidable manual S 293 10.0788 134 -0.24 49
IV.PARC.HHZ. 2021-11-28T03:00:54.29 0.1 positive manual P 62 15.4734 122 0.15 98
IV.ATMC.EHZ. 2021-11-28T03:00:54.68 0.3 undecidable manual P 146 18.2706 118 0.07 74
IV.BADI.EHZ. 2021-11-28T03:00:54.56 0.6 negative manual P 120 16.4724 121 0.26 48
IT.SNS1.HNZ. 2021-11-28T03:00:54.37 0.6 undecidable manual S 102 5.2947 152 0.06 51
IV.SSP9.EHZ. 2021-11-28T03:00:53.97 0.6 undecidable manual S 102 5.2947 152 -0.34 48
IV.CRE.HHZ. 2021-11-28T03:00:53.38 0.1 positive manual P 293 10.0788 134 0.1 100
IT.SNS1.HNZ. 2021-11-28T03:00:52.79 0.3 undecidable manual P 102 5.2947 152 0.1 76
IV.SSP9.EHZ. 2021-11-28T03:00:52.69 0.3 positive manual P 102 5.2947 152 0 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSP9.EHN. ML:1.1 0.00023600000000000002 0.26 AML other m 2021-11-28T03:00:54.46
IV.SSP9.EHE. ML:1.2 0.00025948239 0.4 AML other m 2021-11-28T03:00:54.34
IV.PARC.HHN. ML:1.0 0.00010545 0.14 AML other m 2021-11-28T03:00:56.82
IV.CRE.HHE. ML:0.8 0.00008187022999999999 0.3008 AML other m 2021-11-28T03:00:56.61
IV.CRE.HHN. ML:1.0 0.00013910449999999998 0.2208 AML other m 2021-11-28T03:00:55.34
IV.PARC.HHE. ML:0.9 0.00007466819 0.1392 AML other m 2021-11-28T03:00:57.66
IV.CAFI.HHE. ML:1.1 0.000057719905 2.5392 AML other m 2021-11-28T03:01:08.38
IV.CAFI.HHN. ML:0.8 0.000037199509999999996 0.2208 AML other m 2021-11-28T03:01:01.45
IV.BADI.EHE. ML:0.6 0.00003267055 0.2208 AML other m 2021-11-28T03:00:59.54
IV.BADI.EHN. ML:0.7 0.000047367884999999997 0.1408 AML other m 2021-11-28T03:00:57.40
IV.ATPI.EHE. ML:0.9 0.000033630773 1.3792 AML other m 2021-11-28T03:01:12.07
IV.ATPI.EHN. ML:1.1 0.000053640255 2.2192 AML other m 2021-11-28T03:01:12.33
IV.ATPI.HNE. ML:1.3 0.00009170927749999999 0.68 AML other m 2021-11-28T03:01:07.02
IV.ATPI.HNN. ML:1.4 0.00010424616 0.4912 AML other m 2021-11-28T03:01:03.80
IV.CAFI.HNE. ML:1.1 0.00006673731999999999 1.6592 AML other m 2021-11-28T03:01:08.08
IV.CAFI.HNN. ML:0.9 0.000039344610000000003 0.2304 AML other m 2021-11-28T03:01:01.56
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