Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 09-08-2021 and time 05:06:11 (Italy) in region 3 km E Cannara (PG)

A magnitude ML 0.4 earthquake occured in region: 3 km E Cannara (PG), on

  • 09-08-2021 03:06:11 (UTC)
  • 09-08-2021 05:06:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9890, 12.6240 at 8 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
Cannara PG 3 4305 4305
Spello PG 4 8645 12950
Bevagna PG 6 5081 18031
Foligno PG 8 57155 75186
Assisi PG 9 28299 103485
Gualdo Cattaneo PG 10 6155 109640
Bastia Umbra PG 11 21874 131514
Montefalco PG 11 5679 137193
Bettona PG 12 4367 141560
Valtopina PG 13 1398 142958
Torgiano PG 16 6725 149683
Trevi PG 16 8469 158152
Deruta PG 17 9669 167821
Giano dell'Umbria PG 18 3846 171667
Collazzone PG 18 3473 175140
Castel Ritaldi PG 19 3278 178418
Valfabbrica PG 19 3389 181807
Nocera Umbra PG 19 5839 187646

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km W of Foligno (57155 inhabitants)
23 Km SE of Perugia (166134 inhabitants)
48 Km N of Terni (111501 inhabitants)
76 Km NE of Viterbo (67173 inhabitants)
80 Km SE of Arezzo (99543 inhabitants)
95 Km NW of L'Aquila (69753 inhabitants)
96 Km W of Teramo (54892 inhabitants)
100 Km SW of Fano (60888 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 0.4 2021-08-09
03:06:11		 42.9892 12.6242 9 2021-08-09
03:14:46		 Sala Sismica INGV-Roma 93867661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-09 03:06:11 ± 0.09
Latitude 42.9892 ± 0.0027
Longitude 12.6242 ± 0.0061
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93867661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 381
Semi-minor axis of confidence ellipse (meter) 267
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 85
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 153
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.05936
Epicentral distance of station farthest from the epicenter (degree) 0.34174
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 93867661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-09 03:14:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHN. 2021-08-09T03:06:25.35 0.6 undecidable manual S 82 37.9287 50 0.25 45
IV.MML1.EHZ. 2021-08-09T03:06:23.14 0.3 undecidable manual S 64 31.3464 105 -0.09 71
IV.MURB.HHZ. 2021-08-09T03:06:23.52 0.3 undecidable manual S 345 31.4463 105 0.26 68
IV.ATCC.EHZ. 2021-08-09T03:06:20.08 0.3 undecidable manual S 3 21.7671 111 0.01 73
IV.CESI.HNZ. 2021-08-09T03:06:20.73 0.3 undecidable manual S 85 22.8549 110 0.32 69
IV.FDMO.HHN. 2021-08-09T03:06:19.20 0.3 undecidable manual P 82 37.9287 50 -0.34 67
IV.MOMA.HHZ. 2021-08-09T03:06:19.93 0.3 undecidable manual S 192 20.9679 112 0.11 72
IV.MML1.EHZ. 2021-08-09T03:06:18.26 0.3 undecidable manual P 64 31.3464 105 -0.21 69
IV.MURB.HHZ. 2021-08-09T03:06:18.44 0.6 undecidable manual P 345 31.4463 105 -0.04 48
IV.ATCC.EHZ. 2021-08-09T03:06:16.67 0.3 undecidable manual P 3 21.7671 111 0.03 73
IV.CESI.HNZ. 2021-08-09T03:06:16.90 0.3 undecidable manual P 85 22.8549 110 0.07 72
IV.MOMA.HHZ. 2021-08-09T03:06:16.41 0.3 undecidable manual P 192 20.9679 112 -0.09 72
IV.ASSB.HHZ. 2021-08-09T03:06:15.44 0.3 undecidable manual S 25 6.5934 142 -0.25 72
IV.ASSB.HHZ. 2021-08-09T03:06:14.14 0.1 undecidable manual P 25 6.5934 142 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:0.5 0.00006121896000000001 0.2992 AML other m 2021-08-09T03:06:15.77
IV.ASSB.HHN. ML:0.3 0.000032894050000000004 0.1792 AML other m 2021-08-09T03:06:17.23
IV.MOMA.HHE. ML:0.3 0.000014054870000000001 0.1184 AML other m 2021-08-09T03:06:20.80
IV.MOMA.HHN. ML:0.3 0.000013356868500000001 0.2608 AML other m 2021-08-09T03:06:20.23
IV.ATCC.EHE. ML:0.2 0.000010191765 0.2208 AML other m 2021-08-09T03:06:20.57
IV.ATCC.EHN. ML:-0.2 0.000006707448999999999 0.16 AML other m 2021-08-09T03:06:20.26
IV.MURB.HHE. ML:0.9 0.00004181396 0.2608 AML other m 2021-08-09T03:06:23.94
IV.MURB.HHN. ML:0.9 0.00004022025 0.3392 AML other m 2021-08-09T03:06:24.85
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