Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 04-08-2019 and time 07:22:22 (Italy) in region 7 km NE Sansepolcro (AR)

A magnitude ML 1.0 earthquake occured in region: 7 km NE Sansepolcro (AR), on

  • 04-08-2019 05:22:22 (UTC)
  • 04-08-2019 07:22:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6280, 12.1780 at 9 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 7 15884 15884
San Giustino PG 9 11297 27181
Badia Tedalda AR 9 1087 28268
Borgo Pace PU 10 606 28874
Pieve Santo Stefano AR 12 3183 32057
Mercatello sul Metauro PU 13 1378 33435
Sestino AR 13 1355 34790
Anghiari AR 14 5638 40428
Citerna PG 15 3531 43959
Caprese Michelangelo AR 16 1426 45385
Monterchi AR 17 1757 47142
Casteldelci RN 18 407 47549
Belforte all'Isauro PU 19 769 48318
Sant'Angelo in Vado PU 19 4133 52451
Città di Castello PG 20 39913 92364

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NE of Arezzo (99543 inhabitants)
57 Km S of Cesena (96758 inhabitants)
57 Km SW of Rimini (147750 inhabitants)
60 Km N of Perugia (166134 inhabitants)
67 Km W of Pesaro (94582 inhabitants)
67 Km S of Forlì (117913 inhabitants)
72 Km W of Fano (60888 inhabitants)
76 Km E of Firenze (382808 inhabitants)
76 Km E of Siena (53903 inhabitants)
77 Km SE of Faenza (58541 inhabitants)
81 Km E of Scandicci (50609 inhabitants)
86 Km NW of Foligno (57155 inhabitants)
88 Km S of Ravenna (159116 inhabitants)
89 Km SE of Imola (69797 inhabitants)
91 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
Reviewed
Rev100 		ML 1.0 2019-08-04
05:22:22		 43.6282 12.1783 9 2019-08-04
05:28:46		 Sala Sismica INGV-Roma 71156191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-04 05:22:22 ± 0.07
Latitude 43.6282 ± 0.0036
Longitude 12.1783 ± 0.0050
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71156191

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 428
Semi-minor axis of confidence ellipse (meter) 256
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 326
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
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) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 0.41099
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 71156191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-04 05:28:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FRON.EHZ. 2019-08-04T05:22:37.81 0.6 undecidable manual S 105 45.621 50 0.31 45
IV.CAFI.HHZ. 2019-08-04T05:22:35.16 0.6 undecidable manual S 207 37.3293 50 -0.11 47
IV.ATMI.HHZ. 2019-08-04T05:22:34.30 0.6 undecidable manual S 168 33.4443 50 0.07 48
IV.PIEI.HHZ. 2019-08-04T05:22:33.24 0.6 undecidable manual S 110 30.4473 50 -0.2 47
IV.ATPI.EHZ. 2019-08-04T05:22:32.28 0.6 undecidable manual S 137 26.6511 109 0.04 49
IV.PE3.EHZ. 2019-08-04T05:22:32.33 0.3 undecidable manual S 73 26.5512 109 0.11 72
IV.CPGN.EHZ. 2019-08-04T05:22:31.39 0.6 undecidable manual S 31 22.2555 112 0.56 44
IV.ATMC.EHE. 2019-08-04T05:22:30.19 0.6 undecidable manual S 177 20.1687 115 0.05 49
IV.FRON.EHZ. 2019-08-04T05:22:30.98 0.6 undecidable manual P 105 45.621 50 -0.16 46
IV.ATMI.HHZ. 2019-08-04T05:22:29.21 1.0 positive manual P 168 33.4443 50 -0.04 24
IV.CAFI.HHZ. 2019-08-04T05:22:29.90 0.3 undecidable manual P 207 37.3293 50 0.05 72
IV.CRE.HHZ. 2019-08-04T05:22:29.44 0.6 undecidable manual S 267 18.2706 117 -0.1 49
IV.BADI.EHZ. 2019-08-04T05:22:28.51 0.6 undecidable manual S 158 14.1747 123 0.19 49
IV.PE3.EHZ. 2019-08-04T05:22:28.09 0.3 positive manual P 73 26.5512 109 0 74
IV.PIEI.HHZ. 2019-08-04T05:22:28.44 0.3 negative manual P 110 30.4473 50 -0.35 68
IV.CPGN.EHZ. 2019-08-04T05:22:27.79 1.0 undecidable manual P 31 22.2555 112 0.5 22
IV.ATPI.EHZ. 2019-08-04T05:22:27.99 0.6 undecidable manual P 137 26.6511 109 -0.11 48
IV.SSP9.EHZ. 2019-08-04T05:22:26.51 0.6 undecidable manual S 212 7.0929 142 0.02 51
IV.BADI.EHZ. 2019-08-04T05:22:26.06 0.3 undecidable manual P 158 14.1747 123 0.22 72
IV.CRE.HHZ. 2019-08-04T05:22:26.56 0.1 positive manual P 267 18.2706 117 0.02 100
IV.ATMC.EHE. 2019-08-04T05:22:26.93 0.1 undecidable manual P 177 20.1687 115 0.04 99
IV.PARC.HHE. 2019-08-04T05:22:25.36 0.6 undecidable manual S 65 5.2947 150 -0.79 41
IV.PARC.HHE. 2019-08-04T05:22:24.36 0.1 undecidable manual P 65 5.2947 150 -0.22 98
IV.SSP9.EHZ. 2019-08-04T05:22:24.89 0.1 undecidable manual P 212 7.0929 142 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSP9.EHN. ML:1.0 0.00013800000000000002 0.48 AML other m 2019-08-04T05:22:26.98
IV.SSP9.EHE. ML:0.8 0.00009984999999999999 0.62 AML other m 2019-08-04T05:22:27.00
IV.BADI.EHN. ML:0.9 0.0000848 0.18 AML other m 2019-08-04T05:22:29.42
IV.BADI.EHE. ML:1.1 0.0001245 0.58 AML other m 2019-08-04T05:22:29.85
IV.CRE.HHN. ML:0.9 0.00007235 0.18 AML other m 2019-08-04T05:22:30.16
IV.CRE.HHE. ML:0.8 0.0000478 0.16 AML other m 2019-08-04T05:22:30.11
IV.CPGN.EHN. ML:0.9 0.000054099999999999994 1 AML other m 2019-08-04T05:22:32.47
IV.PE3.EHN. ML:1.8 0.000313 0.54 AML other m 2019-08-04T05:22:33.30
IV.CPGN.EHE. ML:1.1 0.00008655 1.5 AML other m 2019-08-04T05:22:33.91
IV.PE3.EHE. ML:1.8 0.000352 0.36 AML other m 2019-08-04T05:22:33.03
IV.PIEI.HHN. ML:1.0 0.0000429 0.64 AML other m 2019-08-04T05:22:33.82
IV.PIEI.HHE. ML:1.0 0.00005215 0.3 AML other m 2019-08-04T05:22:33.81
IV.ATMI.HHN. ML:1.0 0.00003855 0.82 AML other m 2019-08-04T05:22:35.74
IV.ATMI.HHE. ML:1.1 0.000052199999999999995 0.16 AML other m 2019-08-04T05:22:35.67
IV.CAFI.HHN. ML:0.6 0.000017439999999999996 0.96 AML other m 2019-08-04T05:22:35.31
IV.CAFI.HHE. ML:0.6 0.000017250000000000003 0.12 AML other m 2019-08-04T05:22:36.52
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