Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 25-10-2021 and time 19:02:15 (Italy) in region 4 km SE Pieve Santo Stefano (AR)

A magnitude ML 0.7 earthquake occured in region: 4 km SE Pieve Santo Stefano (AR), on

  • 25-10-2021 17:02:15 (UTC)
  • 25-10-2021 19:02:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6410, 12.0760 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
Pieve Santo Stefano AR 4 3183 3183
Caprese Michelangelo AR 7 1426 4609
Sansepolcro AR 9 15884 20493
Anghiari AR 11 5638 26131
Badia Tedalda AR 12 1087 27218
Chiusi della Verna AR 13 2023 29241
San Giustino PG 13 11297 40538
Chitignano AR 16 899 41437
Citerna PG 16 3531 44968
Monterchi AR 17 1757 46725
Borgo Pace PU 18 606 47331
Subbiano AR 18 6331 53662
Casteldelci RN 18 407 54069
Verghereto FC 18 1907 55976
Capolona AR 19 5438 61414
Castel Focognano AR 19 3149 64563
Sestino AR 19 1355 65918

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km NE of Arezzo (99543 inhabitants)
57 Km S of Cesena (96758 inhabitants)
61 Km SW of Rimini (147750 inhabitants)
65 Km NW of Perugia (166134 inhabitants)
65 Km S of Forlì (117913 inhabitants)
67 Km E of Firenze (382808 inhabitants)
70 Km NE of Siena (53903 inhabitants)
73 Km E of Scandicci (50609 inhabitants)
73 Km S of Faenza (58541 inhabitants)
74 Km W of Pesaro (94582 inhabitants)
79 Km W of Fano (60888 inhabitants)
83 Km E of Prato (191150 inhabitants)
84 Km SE of Imola (69797 inhabitants)
87 Km S of Ravenna (159116 inhabitants)
92 Km NW of Foligno (57155 inhabitants)
99 Km E of Pistoia (90315 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 0.7 2021-10-25
17:02:15		 43.6412 12.0762 10 2021-10-25
17:12:23		 Sala Sismica INGV-Roma 96985441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-25 17:02:15 ± 0.04
Latitude 43.6412 ± 0.0027
Longitude 12.0762 ± 0.0025
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 96985441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 300
Semi-minor axis of confidence ellipse (meter) 174
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 214
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 86
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 16
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) 0.64302
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 96985441
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-25 17:12:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MBAL.EHZ. 2021-10-25T17:03:26.65 3.0 undecidable manual Sg 6.67 0
IV.TERO.HHZ. 2021-10-25T17:03:02.57 3.0 undecidable manual S 1.33 0
IV.MNTT.EHZ. 2021-10-25T17:02:54.42 3.0 undecidable manual S -0.77 0
IV.ARCI.HHZ. 2021-10-25T17:02:43.38 3.0 undecidable manual S -1.31 0
IV.SFI.EHZ. 2021-10-25T17:02:27.07 0.3 undecidable manual S 328 34.5432 50 0.08 72
IV.BRSN.EHZ. 2021-10-25T17:02:27.59 1.0 undecidable manual P 0 71.373 50 -0.02 23
IV.CAFI.HHZ. 2021-10-25T17:02:27.16 0.3 undecidable manual S 194 35.742 50 -0.14 71
IV.ATPI.EHZ. 2021-10-25T17:02:26.82 0.3 undecidable manual S 129 33.6441 50 0.06 72
IV.SFI.EHZ. 2021-10-25T17:02:22.05 0.3 undecidable manual P 328 34.5432 50 0.11 71
IV.NARO.HHZ. 2021-10-25T17:02:22.77 3.0 undecidable manual P -0.24 0
IV.CAFI.HHZ. 2021-10-25T17:02:22.16 0.3 undecidable manual P 194 35.742 50 0.04 72
IV.BADI.EHZ. 2021-10-25T17:02:22.80 0.3 undecidable manual S 137 19.869 116 0.06 74
IV.PIEI.HHZ. 2021-10-25T17:02:22.46 3.0 undecidable manual P -0.02 0
IV.ATPI.EHZ. 2021-10-25T17:02:21.82 0.3 undecidable manual P 129 33.6441 50 0.01 73
IV.ASQU.HHZ. 2021-10-25T17:02:20.85 0.3 undecidable manual P 307 28.749 50 -0.2 71
IV.PARC.HHZ. 2021-10-25T17:02:20.49 0.3 undecidable manual S 86 13.0758 127 -0.23 72
IV.SSP9.EHZ. 2021-10-25T17:02:19.68 0.3 undecidable manual S 149 8.6802 139 0.08 75
IV.BADI.EHZ. 2021-10-25T17:02:19.40 0.1 undecidable manual P 137 19.869 116 -0.09 98
IV.CRE.HHZ. 2021-10-25T17:02:19.87 0.3 undecidable manual S 256 10.2786 134 -0.12 74
IV.PARC.HHZ. 2021-10-25T17:02:18.38 0.1 undecidable manual P 86 13.0758 127 0.06 100
IV.CRE.HHZ. 2021-10-25T17:02:18.00 0.1 undecidable manual P 256 10.2786 134 0.1 100
IV.SSP9.EHZ. 2021-10-25T17:02:17.83 0.3 undecidable manual P 149 8.6802 139 0.15 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRE.HHN. ML:1.0 0.00012575 0.2 AML other m 2021-10-25T17:02:20.07
IV.CRE.HHE. ML:0.9 0.00009455 0.72 AML other m 2021-10-25T17:02:20.10
IV.PARC.HHN. ML:0.9 0.00007980000000000002 0.12 AML other m 2021-10-25T17:02:20.67
IV.PARC.HHE. ML:0.8 0.00006459999999999998 1.42 AML other m 2021-10-25T17:02:20.14
IV.PIEI.HHN. ML:0.9 0.00002965 0.1 AML other m 2021-10-25T17:02:28.55
IV.PIEI.HHE. ML:1.0 0.0000394 0.12 AML other m 2021-10-25T17:02:28.79
IV.SSP9.EHE. ML:0.8 0.00009748828 0.0768 AML other m 2021-10-25T17:02:19.81
IV.SSP9.EHN. ML:0.9 0.00010646449000000001 0.2176 AML other m 2021-10-25T17:02:19.74
IV.BADI.EHE. ML:0.5 0.000026755405 0.1664 AML other m 2021-10-25T17:02:23.71
IV.BADI.EHN. ML:0.5 0.000027093365 0.1152 AML other m 2021-10-25T17:02:23.72
IV.ATPI.EHE. ML:0.6 0.000014712744999999999 0.3072 AML other m 2021-10-25T17:02:26.94
IV.ATPI.EHN. ML:0.6 0.000017227985 2.0736 AML other m 2021-10-25T17:02:27.78
IV.CAFI.HHE. ML:0.4 0.000011591585 1.7152 AML other m 2021-10-25T17:02:28.15
IV.CAFI.HHN. ML:0.6 0.000013900105285 0.1664 AML other m 2021-10-25T17:02:27.50
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