Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 25-05-2021 and time 22:59:18 (Italy) in region 1 km NE Pieve Santo Stefano (AR)

A magnitude ML 1.0 earthquake occured in region: 1 km NE Pieve Santo Stefano (AR), on

  • 25-05-2021 20:59:18 (UTC)
  • 25-05-2021 22:59:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6780, 12.0550 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 1 3183 3183
Caprese Michelangelo AR 7 1426 4609
Chiusi della Verna AR 10 2023 6632
Badia Tedalda AR 11 1087 7719
Verghereto FC 14 1907 9626
Sansepolcro AR 14 15884 25510
Chitignano AR 14 899 26409
Casteldelci RN 15 407 26816
Anghiari AR 15 5638 32454
San Giustino PG 17 11297 43751
Castel Focognano AR 18 3149 46900
Subbiano AR 19 6331 53231
Bibbiena AR 19 12241 65472
Borgo Pace PU 20 606 66078
Sestino AR 20 1355 67433

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NE of Arezzo (99543 inhabitants)
53 Km S of Cesena (96758 inhabitants)
59 Km SW of Rimini (147750 inhabitants)
61 Km S of Forlì (117913 inhabitants)
65 Km E of Firenze (382808 inhabitants)
69 Km S of Faenza (58541 inhabitants)
69 Km NW of Perugia (166134 inhabitants)
71 Km NE of Siena (53903 inhabitants)
71 Km E of Scandicci (50609 inhabitants)
74 Km W of Pesaro (94582 inhabitants)
80 Km W of Fano (60888 inhabitants)
80 Km SE of Imola (69797 inhabitants)
80 Km E of Prato (191150 inhabitants)
83 Km S of Ravenna (159116 inhabitants)
96 Km E of Pistoia (90315 inhabitants)
96 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
Reviewed
Rev100 		ML 1.0 2021-05-25
20:59:18		 43.6782 12.0547 10 2021-05-25
21:39:30		 Sala Sismica INGV-Roma 90493621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-25 20:59:18 ± 0.06
Latitude 43.6782 ± 0.0045
Longitude 12.0547 ± 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 90493621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 544
Semi-minor axis of confidence ellipse (meter) 218
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 207
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.09533
Epicentral distance of station farthest from the epicenter (degree) 0.47124
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 23
Type of magnitude ML
Reference to an origin 90493621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-25 21:39:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RUFI.EHZ. 2021-05-25T20:59:27.47 0.3 undecidable manual P 292 47.1195 50 0.35 88
IV.BADI.EHZ. 2021-05-25T20:59:27.13 0.3 undecidable manual S 141 24.1536 112 -0.13 96
IV.ASQU.HHZ. 2021-05-25T20:59:27.28 0.3 undecidable manual S 302 24.9528 111 -0.27 93
IV.LMD.HHZ. 2021-05-25T20:59:27.91 0.3 undecidable manual P 328 52.3032 50 0 94
IV.PIEI.HHZ. 2021-05-25T20:59:26.15 0.3 undecidable manual P 112 41.7249 50 -0.13 93
IV.ATVO.HHZ. 2021-05-25T20:59:26.53 0.3 undecidable manual P 139 43.3233 50 0 95
IV.CAFI.HHZ. 2021-05-25T20:59:26.00 0.3 undecidable manual P 190 39.3273 50 0.08 94
IV.NARO.HHZ. 2021-05-25T20:59:26.25 0.3 undecidable manual P 100 42.8238 50 -0.21 91
IV.PARC.HHZ. 2021-05-25T20:59:24.26 0.3 undecidable manual S 102 15.0738 123 -0.22 96
IV.CPGN.EHZ. 2021-05-25T20:59:24.24 0.3 undecidable manual P 57 25.2525 111 0.57 86
IV.SSP9.EHZ. 2021-05-25T20:59:24.01 0.3 undecidable manual S 152 13.0758 126 0.11 98
IV.SFI.EHZ. 2021-05-25T20:59:24.32 0.3 undecidable manual P 327 30.1476 50 -0.17 94
IV.ASQU.HHZ. 2021-05-25T20:59:23.51 0.3 undecidable manual P 302 24.9528 111 -0.11 96
IV.CRE.HHZ. 2021-05-25T20:59:23.18 0.3 undecidable manual S 232 10.5783 132 -0.04 100
IV.BADI.EHZ. 2021-05-25T20:59:23.34 0.3 undecidable manual P 141 24.1536 112 -0.11 96
IV.CRE.HHZ. 2021-05-25T20:59:21.33 0.3 undecidable manual P 232 10.5783 132 0.21 97
IV.SSP9.EHZ. 2021-05-25T20:59:21.62 0.3 undecidable manual P 152 13.0758 126 0.1 98
IV.PARC.HHZ. 2021-05-25T20:59:21.90 0.3 undecidable manual P 102 15.0738 123 0.05 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRE.HHN. ML:1.3 0.000245 0.2 AML other m 2021-05-25T20:59:23.51
IV.CRE.HHE. ML:1.2 0.000176 0.2 AML other m 2021-05-25T20:59:23.65
IV.PARC.HHN. ML:1.6 0.0003855 0.3 AML other m 2021-05-25T20:59:24.58
IV.PARC.HHE. ML:1.1 0.0001255 0.26 AML other m 2021-05-25T20:59:24.57
IV.ASQU.HHE. ML:0.6 0.000024849010000000003 0.4224 AML other m 2021-05-25T20:59:29.91
IV.BADI.EHN. ML:0.9 0.00004857944 0.2432 AML other m 2021-05-25T20:59:29.51
IV.BADI.EHE. ML:1.1 0.00007403274 0.256 AML other m 2021-05-25T20:59:29.29
IV.SFI.EHE. ML:0.8 0.000029054311500000002 0.128 AML other m 2021-05-25T20:59:29.52
IV.ASQU.HHN. ML:0.9 0.000051344959999999994 0.3712 AML other m 2021-05-25T20:59:30.13
IV.CAFI.HHN. ML:0.8 0.000024 0.7 AML other m 2021-05-25T20:59:31.58
IV.CAFI.HHE. ML:0.8 0.00002194658 0.2688 AML other m 2021-05-25T20:59:32.60
IV.PIEI.HHN. ML:1.0 0.0000371 1.02 AML other m 2021-05-25T20:59:32.79
IV.PIEI.HHE. ML:1.4 0.00008795 0.12 AML other m 2021-05-25T20:59:32.41
IV.SFI.EHN. ML:0.7 0.000023715105 0.1664 AML other m 2021-05-25T20:59:29.86
IV.SSP9.EHE. ML:0.9 0.0000889255 0.4224 AML other m 2021-05-25T20:59:24.43
IV.SSP9.EHN. ML:0.9 0.000079127855 0.2816 AML other m 2021-05-25T20:59:24.38
IV.NARO.HHE. ML:0.9 0.000024257861 0.1408 AML other m 2021-05-25T20:59:34.21
IV.NARO.HHN. ML:1.0 0.000035102425 0.1408 AML other m 2021-05-25T20:59:33.47
IV.ATVO.HHE. ML:0.9 0.000022756819999999997 0.3072 AML other m 2021-05-25T20:59:37.29
IV.ATVO.HHN. ML:1.0 0.000035701990000000004 0.1536 AML other m 2021-05-25T20:59:33.98
IV.RUFI.EHN. ML:1.0 0.000023013099999999998 0.3328 AML other m 2021-05-25T20:59:36.24
IV.LMD.HHE. ML:0.9 0.0000179705315 0.2688 AML other m 2021-05-25T20:59:37.23
IV.LMD.HHN. ML:0.9 0.000020630753999999997 0.1792 AML other m 2021-05-25T20:59:36.90
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