Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 19-09-2021 and time 10:48:02 (UTC) in region 6 km S Pietralunga (PG)

A magnitude ML 0.9 earthquake occured in region: 6 km S Pietralunga (PG), on

  • 19-09-2021 10:48:02 (UTC)
  • 19-09-2021 12:48:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.3870, 12.4240 at 5 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
Pietralunga PG 6 2111 2111
Montone PG 8 1680 3791
Umbertide PG 12 16681 20472
Gubbio PG 13 32216 52688
Città di Castello PG 17 39913 92601
Cantiano PU 19 2245 94846
Apecchio PU 19 1882 96728
Scheggia e Pascelupo PG 20 1393 98121

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km N of Perugia (166134 inhabitants)
45 Km E of Arezzo (99543 inhabitants)
53 Km NW of Foligno (57155 inhabitants)
70 Km SW of Fano (60888 inhabitants)
70 Km SW of Pesaro (94582 inhabitants)
76 Km S of Rimini (147750 inhabitants)
85 Km S of Cesena (96758 inhabitants)
89 Km E of Siena (53903 inhabitants)
92 Km W of Ancona (100861 inhabitants)
94 Km N of Terni (111501 inhabitants)
98 Km SE of Forlì (117913 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 0.9 2021-09-19
10:48:02		 43.3867 12.4238 5 2021-09-19
10:59:05		 Sala Sismica INGV-Roma 95630171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-19 10:48:02 ± 0.08
Latitude 43.3867 ± 0.0018
Longitude 12.4238 ± 0.0037
Depth (km) 5 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95630171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 276
Semi-minor axis of confidence ellipse (meter) 84
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 79
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00989
Epicentral distance of station farthest from the epicenter (degree) 0.33725
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 95630171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-19 10:59:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAFI.HHZ. 2021-09-19T10:48:15.01 0.1 undecidable manual S 260 37.4292 97 -0.49 85
IV.ATCC.EHZ. 2021-09-19T10:48:12.41 0.1 undecidable manual S 142 28.3494 99 0.04 95
IV.BADI.EHZ. 2021-09-19T10:48:09.85 0.1 undecidable manual S 313 19.869 103 0.36 90
IV.APEC.HHZ. 2021-09-19T10:48:09.32 0.1 undecidable manual S 359 19.0698 104 0.11 95
IV.CAFI.HHZ. 2021-09-19T10:48:09.63 1.0 negative manual P 260 37.4292 97 -0.33 22
IV.ATCC.EHZ. 2021-09-19T10:48:08.28 0.6 undecidable manual P 142 28.3494 99 0.12 47
IV.MURB.HHZ. 2021-09-19T10:48:08.56 0.3 undecidable manual S 149 15.9729 106 0.39 68
IV.ATBU.HNE. 2021-09-19T10:48:07.76 0.1 undecidable manual S 45 14.0748 108 0.22 94
IV.ATPC.HHE. 2021-09-19T10:48:06.65 0.1 undecidable manual S 14 10.7781 114 0.17 95
IV.BADI.EHZ. 2021-09-19T10:48:06.63 1.0 negative manual P 313 19.869 103 0.14 24
IV.ATFO.HHZ. 2021-09-19T10:48:06.67 0.1 undecidable manual S 101 12.0768 111 -0.23 94
IV.APEC.HHZ. 2021-09-19T10:48:06.03 0.3 undecidable manual P 359 19.0698 104 -0.3 69
IV.MURB.HHZ. 2021-09-19T10:48:05.60 1.0 positive manual P 149 15.9729 106 -0.13 24
IV.ATPI.EHZ. 2021-09-19T10:48:05.46 0.1 undecidable manual S 346 7.2927 123 0.05 98
IV.ATBU.HNE. 2021-09-19T10:48:05.30 0.1 undecidable manual P 45 14.0748 108 -0.07 97
IV.ATMI.HHZ. 2021-09-19T10:48:05.48 0.3 undecidable manual P 245 13.875 109 0.15 71
IV.ATLO.HNZ. 2021-09-19T10:48:05.88 0.1 undecidable manual S 190 8.0808 120 0.25 94
IV.ATFO.HHZ. 2021-09-19T10:48:04.72 0.1 undecidable manual P 101 12.0768 111 -0.28 93
IV.TB02.DHE.01 2021-09-19T10:48:04.35 0.1 undecidable manual S 213 2.1978 155 0.16 97
IV.ATVO.HHZ. 2021-09-19T10:48:04.09 0.1 undecidable manual S 250 1.4985 162 -0.02 100
IV.ATLO.HNZ. 2021-09-19T10:48:04.33 0.1 undecidable manual P 190 8.0808 120 0.06 98
IV.ATPC.HHE. 2021-09-19T10:48:04.67 0.1 undecidable manual P 14 10.7781 114 -0.08 97
IV.ATPI.EHZ. 2021-09-19T10:48:04.12 0.6 positive manual P 346 7.2927 123 -0.02 49
IV.TB03.DH2.01 2021-09-19T10:48:04.03 0.1 undecidable manual S 326 1.998 157 -0.13 97
IV.TB03.DH2.01 2021-09-19T10:48:03.33 0.1 undecidable manual P 326 1.998 157 -0.09 98
IV.TB02.DHE.01 2021-09-19T10:48:03.57 0.1 undecidable manual P 213 2.1978 155 0.14 97
IV.ATVO.HHZ. 2021-09-19T10:48:03.38 0.1 undecidable manual P 250 1.4985 162 -0.01 100
IV.TB01.DHE.01 2021-09-19T10:48:03.87 0.1 undecidable manual S 121 1.0989 167 -0.2 96
IV.TB01.DHE.01 2021-09-19T10:48:03.22 0.1 undecidable manual P 121 1.0989 167 -0.15 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATPI.EHN. ML:0.8 0.00012631745 0.1408 AML other m 2021-09-19T10:48:05.69
IV.ATPI.EHE. ML:0.7 0.000083165395 0.224 AML other m 2021-09-19T10:48:06.76
IV.ATFO.HHN. ML:0.8 0.000086111165 0.1216 AML other m 2021-09-19T10:48:06.90
IV.ATFO.HHE. ML:1.0 0.0001255 0.18 AML other m 2021-09-19T10:48:07.11
IV.BADI.EHN. ML:0.9 0.00007081445000000001 0.1408 AML other m 2021-09-19T10:48:10.31
IV.ATMI.HHE. ML:0.6 0.0000466 1.72 AML other m 2021-09-19T10:48:10.97
IV.BADI.EHE. ML:1.0 0.00008975 0.14 AML other m 2021-09-19T10:48:10.17
IV.ATCC.EHN. ML:1.0 0.0000481429 0.2816 AML other m 2021-09-19T10:48:12.89
IV.ATMI.HHN. ML:0.7 0.00006510000000000001 1.64 AML other m 2021-09-19T10:48:13.12
IV.ATCC.EHE. ML:1.0 0.000054613704999999996 0.1216 AML other m 2021-09-19T10:48:12.65
IV.ATPI.HNE. ML:0.8 0.000102953715 0.3136 AML other m 2021-09-19T10:48:05.56
IV.ATPI.HNN. ML:0.8 0.00012275375 0.128 AML other m 2021-09-19T10:48:05.68
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