Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 06-09-2021 and time 23:28:18 (Italy) in region 6 km W Valfabbrica (PG)

A magnitude ML 1.1 earthquake occured in region: 6 km W Valfabbrica (PG), on

  • 06-09-2021 21:28:18 (UTC)
  • 06-09-2021 23:28:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1640, 12.5270 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
Valfabbrica PG 6 3389 3389
Bastia Umbra PG 11 21874 25263
Assisi PG 13 28299 53562
Perugia PG 13 166134 219696
Torgiano PG 17 6725 226421
Bettona PG 17 4367 230788
Cannara PG 19 4305 235093
Corciano PG 20 21332 256425

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km E of Perugia (166134 inhabitants)
27 Km NW of Foligno (57155 inhabitants)
62 Km SE of Arezzo (99543 inhabitants)
68 Km N of Terni (111501 inhabitants)
85 Km SW of Fano (60888 inhabitants)
89 Km SW of Pesaro (94582 inhabitants)
90 Km NE of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
98 Km E of Siena (53903 inhabitants)
100 Km S of Rimini (147750 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 1.1 2021-09-06
21:28:18		 43.1645 12.5273 10 2021-09-06
21:36:29		 Sala Sismica INGV-Roma 95124031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-06 21:28:18 ± 0.06
Latitude 43.1645 ± 0.0036
Longitude 12.5273 ± 0.0049
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 95124031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 482
Semi-minor axis of confidence ellipse (meter) 210
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 56
Circular confidence region, given by single value of horizontal uncertainty (meter) 480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.08454
Epicentral distance of station farthest from the epicenter (degree) 0.54139
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:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 95124031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-06 21:36:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CESI.HHZ. 2021-09-06T21:28:30.41 0.6 undecidable manual S 120 35.3424 50 0.21 47
IV.ATPI.EHZ. 2021-09-06T21:28:29.52 0.6 undecidable manual S 342 33.3444 50 -0.13 48
IV.NRCA.HHZ. 2021-09-06T21:28:28.88 0.1 undecidable manual P 127 60.0954 50 -0.02 93
IV.ARVD.HHZ. 2021-09-06T21:28:27.36 0.6 negative manual P 42 49.8168 50 0.04 47
IV.EL6.EHZ. 2021-09-06T21:28:27.34 0.1 undecidable manual P 68 49.9167 50 0.02 95
IV.ATMI.HHZ. 2021-09-06T21:28:27.62 0.6 undecidable manual S 312 28.1496 50 -0.66 42
IV.NARO.HHZ. 2021-09-06T21:28:27.22 1.0 negative manual P 5 49.7169 50 -0.07 23
IV.CAFI.HHZ. 2021-09-06T21:28:27.42 0.3 negative manual P 292 48.9177 50 0.26 68
IV.MGAB.HHZ. 2021-09-06T21:28:26.61 0.6 negative manual P 230 43.7229 50 0.24 46
IV.ATFO.HHZ. 2021-09-06T21:28:26.84 0.6 undecidable manual S 9 22.6551 114 0.14 49
IV.FRON.EHZ. 2021-09-06T21:28:26.02 0.6 positive manual P 22 42.3243 50 -0.13 47
IV.CESI.HHZ. 2021-09-06T21:28:25.07 0.6 undecidable manual P 120 35.3424 50 -0.01 49
IV.MML1.EHZ. 2021-09-06T21:28:25.29 1.0 positive manual P 99 36.4413 50 0.05 24
IV.ATMI.HHZ. 2021-09-06T21:28:24.00 0.1 undecidable manual P 312 28.1496 50 0.03 98
IV.ASSB.HHZ. 2021-09-06T21:28:24.71 0.6 undecidable manual S 142 17.1717 120 -0.3 47
IV.ATPI.EHZ. 2021-09-06T21:28:24.80 0.6 positive manual P 342 33.3444 50 0.03 49
IV.ATFO.HHZ. 2021-09-06T21:28:23.06 0.1 undecidable manual P 9 22.6551 114 0 100
IV.MURB.HHZ. 2021-09-06T21:28:23.25 0.6 undecidable manual S 359 10.878 133 0 51
IV.ASSB.HHZ. 2021-09-06T21:28:22.00 0.3 positive manual P 142 17.1717 120 -0.08 74
IV.ATCC.EHZ. 2021-09-06T21:28:22.75 0.6 undecidable manual S 76 9.3795 137 -0.12 50
IV.MURB.HHZ. 2021-09-06T21:28:21.20 0.1 positive manual P 359 10.878 133 0.14 99
IV.ATCC.EHZ. 2021-09-06T21:28:20.86 0.6 undecidable manual P 76 9.3795 137 0.01 51
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.EHN. ML:1.8 0.0007700000000000001 1.9 AML other m 2021-09-06T21:28:22.00
IV.ATCC.EHE. ML:1.7 0.000718 0.14 AML other m 2021-09-06T21:28:23.00
IV.MURB.HNE. ML:2.0 0.0011400000000000002 0.28 AML other m 2021-09-06T21:28:23.98
IV.MURB.HHE. ML:1.9 0.000986 0.3 AML other m 2021-09-06T21:28:23.99
IV.MURB.HHN. ML:1.9 0.000987 0.84 AML other m 2021-09-06T21:28:24.76
IV.MURB.HNN. ML:1.9 0.0009875 0.82 AML other m 2021-09-06T21:28:24.76
IV.ASSB.HHE. ML:1.1 0.00009939999999999999 0.56 AML other m 2021-09-06T21:28:25.08
IV.ASSB.HHN. ML:1.1 0.0001108 1.52 AML other m 2021-09-06T21:28:25.10
IV.ATFO.HHE. ML:1.2 0.0001041 0.22 AML other m 2021-09-06T21:28:27.22
IV.ATFO.HHN. ML:1.0 0.00006914999999999999 1.56 AML other m 2021-09-06T21:28:27.07
IV.ATMI.HHE. ML:1.0 0.000053099999999999996 1.54 AML other m 2021-09-06T21:28:28.07
IV.MML1.EHN. ML:1.2 0.0000669 1.66 AML other m 2021-09-06T21:28:30.04
IV.CESI.HHE. ML:0.9 0.0000303 0.78 AML other m 2021-09-06T21:28:31.42
IV.MML1.EHE. ML:1.3 0.0000698 1.06 AML other m 2021-09-06T21:28:31.08
IV.ATPI.EHN. ML:0.8 0.0000291 1.18 AML other m 2021-09-06T21:28:31.02
IV.ATPI.EHE. ML:0.8 0.00002335 0.64 AML other m 2021-09-06T21:28:31.65
IV.ATMI.HHN. ML:0.9 0.0000407 0.24 AML other m 2021-09-06T21:28:31.81
IV.CESI.HHN. ML:1.0 0.000044999999999999996 0.76 AML other m 2021-09-06T21:28:32.03
IV.FRON.EHE. ML:1.1 0.000040050000000000004 0.54 AML other m 2021-09-06T21:28:32.33
IV.FRON.EHN. ML:1.1 0.00004155 0.86 AML other m 2021-09-06T21:28:33.63
IV.MGAB.HHE. ML:1.2 0.00005225 0.86 AML other m 2021-09-06T21:28:35.01
IV.CAFI.HHE. ML:0.9 0.0000203 0.12 AML other m 2021-09-06T21:28:35.61
IV.MGAB.HHN. ML:1.3 0.00006315 0.74 AML other m 2021-09-06T21:28:36.06
IV.CAFI.HHN. ML:0.8 0.0000174 1.26 AML other m 2021-09-06T21:28:36.99
IV.NRCA.HHE. ML:1.0 0.00002195 0.88 AML other m 2021-09-06T21:28:39.16
IV.NRCA.HHN. ML:1.2 0.00002855 0.12 AML other m 2021-09-06T21:28:39.73
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