Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 17-10-2021 and time 13:59:57 (Italy) in region 6 km W Borgo Pace (PU)

A magnitude ML 0.5 earthquake occured in region: 6 km W Borgo Pace (PU), on

  • 17-10-2021 11:59:57 (UTC)
  • 17-10-2021 13:59:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6410, 12.2270 at 5 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
Borgo Pace PU 6 606 606
Badia Tedalda AR 8 1087 1693
Mercatello sul Metauro PU 9 1378 3071
Sestino AR 10 1355 4426
Sansepolcro AR 10 15884 20310
San Giustino PG 11 11297 31607
Belforte all'Isauro PU 15 769 32376
Pieve Santo Stefano AR 15 3183 35559
Sant'Angelo in Vado PU 15 4133 39692
Anghiari AR 18 5638 45330
Casteldelci RN 18 407 45737
Piandimeleto PU 18 2167 47904
Apecchio PU 18 1882 49786
Carpegna PU 18 1674 51460
Citerna PG 18 3531 54991
Frontino PU 18 293 55284
Caprese Michelangelo AR 19 1426 56710
Monterchi AR 20 1757 58467
Pennabilli RN 20 2869 61336

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NE of Arezzo (99543 inhabitants)
54 Km SW of Rimini (147750 inhabitants)
55 Km S of Cesena (96758 inhabitants)
61 Km N of Perugia (166134 inhabitants)
63 Km W of Pesaro (94582 inhabitants)
67 Km S of Forlì (117913 inhabitants)
68 Km W of Fano (60888 inhabitants)
77 Km SE of Faenza (58541 inhabitants)
79 Km E of Firenze (382808 inhabitants)
81 Km E of Siena (53903 inhabitants)
85 Km E of Scandicci (50609 inhabitants)
85 Km NW of Foligno (57155 inhabitants)
86 Km S of Ravenna (159116 inhabitants)
89 Km SE of Imola (69797 inhabitants)
95 Km E of Prato (191150 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 0.5 2021-10-17
11:59:57		 43.641 12.2272 5 2022-03-30
13:04:15		 Bollettino Sismico Italiano INGV 97341101
Reviewed
Rev100 		ML 0.6 2021-10-17
11:59:57		 43.6533 12.2197 11 2021-10-17
12:05:32		 Sala Sismica INGV-Roma 96679331
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-17 11:59:57 ± 0.16
Latitude 43.6410 ± 0.0063
Longitude 12.2272 ± 0.0062
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97341101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 633
Semi-minor axis of confidence ellipse (meter) 268
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 168
Circular confidence region, given by single value of horizontal uncertainty (meter) 630.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.01079
Epicentral distance of station farthest from the epicenter (degree) 0.25721
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 97341101
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-08 12:11:13

ML:0.6

Field Value
Value 0.6
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 96679331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-17 12:05:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PIEI.HHZ. 2021-10-17T12:00:07.19 0.3 undecidable manual S 115 27.3504 101 -0.21 70
IV.NARO.HHZ. 2021-10-17T12:00:07.48 0.3 undecidable manual S 97 28.5492 101 -0.34 68
IV.PE3.EHZ. 2021-10-17T12:00:05.97 0.3 undecidable manual S 74 22.4553 104 0.23 70
IV.CPGN.EHZ. 2021-10-17T12:00:05.19 0.3 undecidable manual S 23 19.2696 106 0.52 66
IV.CRE.HHZ. 2021-10-17T12:00:05.57 0.1 undecidable manual S 264 22.2555 104 -0.11 96
IV.BADI.EHZ. 2021-10-17T12:00:03.50 0.3 undecidable manual S 175 14.6742 110 0.36 69
IV.PIEI.HHZ. 2021-10-17T12:00:03.15 0.6 undecidable manual P 115 27.3504 101 -0.16 47
IV.ATPI.EHE. 2021-10-17T12:00:03.55 0.1 undecidable manual P 146 25.3524 102 0.63 83
IV.NARO.HHZ. 2021-10-17T12:00:03.35 0.1 undecidable manual P 97 28.5492 101 -0.2 93
IV.CRE.HHZ. 2021-10-17T12:00:02.01 0.1 undecidable manual P 264 22.2555 104 -0.31 92
IV.ATPC.HHE. 2021-10-17T12:00:02.31 0.1 undecidable manual P 134 25.6521 102 -0.67 82
IV.PE3.EHZ. 2021-10-17T12:00:02.37 0.6 negative manual P 74 22.4553 104 0.02 49
IV.ATMC.EHE. 2021-10-17T12:00:02.29 0.1 undecidable manual P 187 21.6672 104 0.08 96
IV.BADI.EHZ. 2021-10-17T12:00:01.23 0.1 undecidable manual P 175 14.6742 110 0.38 91
IV.CPGN.EHZ. 2021-10-17T12:00:01.82 0.6 undecidable manual P 23 19.2696 106 0.08 48
IV.PARC.HHZ. 2021-10-17T11:59:59.55 0.1 undecidable manual S 47 1.1988 167 -0.11 99
IV.PARC.HHZ. 2021-10-17T11:59:58.78 0.1 positive manual P 47 1.1988 167 -0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CPGN.EHN. ML:0.6 0.0000363844815 1.44 AML other m 2021-10-17T12:00:01.24
IV.CPGN.EHE. ML:0.7 0.000043790604999999994 1.0016 AML other m 2021-10-17T12:00:03.59
IV.BADI.EHN. ML:0.6 0.0000467 0.1 AML other m 2021-10-17T12:00:04.49
IV.BADI.EHE. ML:0.7 0.00005553033 0.1408 AML other m 2021-10-17T12:00:04.64
IV.CPGN.HNN. ML:1.4 0.00020510655 1.1328 AML other m 2021-10-17T12:00:04.39
IV.CRE.HHN. ML:0.3 0.000015506064999999998 0.2432 AML other m 2021-10-17T12:00:05.93
IV.CRE.HHE. ML:0.1 0.000009449947000000001 0.4032 AML other m 2021-10-17T12:00:05.79
IV.PE3.EHN. ML:0.6 0.000026018304999999998 0.1024 AML other m 2021-10-17T12:00:06.67
IV.PE3.EHE. ML:0.6 0.000025893334999999997 0.1216 AML other m 2021-10-17T12:00:06.67
IV.NARO.HHN. ML:0.7 0.000023796775 0.1408 AML other m 2021-10-17T12:00:07.75
IV.PIEI.HHE. ML:0.2 0.000010520089999999999 0.096 AML other m 2021-10-17T12:00:08.51
IV.PIEI.HHN. ML:0.2 0.0000078539615 0.16 AML other m 2021-10-17T12:00:08.45
IV.NARO.HHE. ML:0.3 0.00001112553 0.0576 AML other m 2021-10-17T12:00:08.58
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