Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 08-07-2020 and time 20:23:48 (Italy) in region 4 km N Collazzone (PG)

A magnitude ML 1.2 earthquake occured in region: 4 km N Collazzone (PG), on

  • 08-07-2020 18:23:48 (UTC)
  • 08-07-2020 20:23:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9340, 12.4480 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
Collazzone PG 4 3473 3473
Deruta PG 6 9669 13142
Marsciano PG 9 18902 32044
Gualdo Cattaneo PG 9 6155 38199
Bettona PG 9 4367 42566
Torgiano PG 10 6725 49291
Fratta Todina PG 11 1839 51130
Monte Castello di Vibio PG 13 1567 52697
Cannara PG 13 4305 57002
Bevagna PG 13 5081 62083
Giano dell'Umbria PG 15 3846 65929
San Venanzo TR 16 2218 68147
Bastia Umbra PG 17 21874 90021
Todi PG 17 16851 106872
Montefalco PG 17 5679 112551
Massa Martana PG 19 3770 116321
Spello PG 19 8645 124966
Perugia PG 20 166134 291100

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km S of Perugia (166134 inhabitants)
21 Km W of Foligno (57155 inhabitants)
45 Km NW of Terni (111501 inhabitants)
64 Km NE of Viterbo (67173 inhabitants)
75 Km SE of Arezzo (99543 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 1.2 2020-07-08
18:23:48		 42.9345 12.4482 10 2020-07-08
18:58:54		 Sala Sismica INGV-Roma 80889181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-08 18:23:48 ± 0.12
Latitude 42.9345 ± 0.0153
Longitude 12.4482 ± 0.0160
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 80889181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1975
Semi-minor axis of confidence ellipse (meter) 849
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 211
Circular confidence region, given by single value of horizontal uncertainty (meter) 1970.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 195
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 18
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.51711
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 80889181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-08 18:58:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCRV.HHZ. 2020-07-08T18:25:27.12 3.0 undecidable manual Sg 21.25 0
IV.MPNC.HHZ. 2020-07-08T18:25:17.25 3.0 undecidable manual Pg 16.809999 0
IV.SGO.HHZ. 2020-07-08T18:25:10.14 3.0 undecidable manual Sn -1.55 0
IV.CELB.HHZ. 2020-07-08T18:24:54.93 3.0 undecidable manual Sg 0.18 0
IV.LRP.EHZ. 2020-07-08T18:24:42.75 3.0 undecidable manual Sn 0.39 0
IV.SARZ.HHZ. 2020-07-08T18:24:27.59 3.0 positive manual Pg 0.38 0
IV.COLB.HHZ. 2020-07-08T18:24:27.06 3.0 undecidable manual Pn 4.18 0
IV.ZONE.HHZ. 2020-07-08T18:24:20.59 3.0 positive manual Pg 0.08 0
IV.PESA.HHZ. 2020-07-08T18:24:06.04 3.0 undecidable manual Sn 0.97 0
IV.ATVO.HHZ. 2020-07-08T18:24:04.45 0.6 undecidable manual S 356 49.7169 50 0.31 48
IV.MURB.HHZ. 2020-07-08T18:24:00.90 0.6 undecidable manual S 10 36.9297 50 0.17 50
IV.ATCC.EHZ. 2020-07-08T18:23:59.30 0.6 undecidable manual S 29 31.8459 50 -0.07 52
IV.CESX.HHZ. 2020-07-08T18:23:59.59 3.0 undecidable manual P 0
IV.TB03.DH1.01 2020-07-08T18:23:58.00 0.3 undecidable manual P 357 51.9036 50 0.28 72
IV.ATPI.EHE. 2020-07-08T18:23:58.72 0.6 undecidable manual P 356 57.3981 50 0.15 49
IV.NRCA.HHZ. 2020-07-08T18:23:58.20 0.1 undecidable manual P 101 55.3002 50 -0.04 100
IV.ATTE.HHZ. 2020-07-08T18:23:58.50 0.3 undecidable manual S 345 30.2475 50 -0.43 72
IV.ATVO.HHZ. 2020-07-08T18:23:57.45 0.3 undecidable manual P 356 49.7169 50 0.06 76
IV.SNTG.HHE. 2020-07-08T18:23:57.72 0.3 undecidable manual P 48 53.4021 50 -0.24 72
IV.TB01.DHE.01 2020-07-08T18:23:57.57 0.3 undecidable manual P 359 49.617 50 0.2 73
IV.ATLO.EHE. 2020-07-08T18:23:56.57 0.6 undecidable manual P 356 42.3243 50 0.32 48
IV.CESI.HHE. 2020-07-08T18:23:56.04 0.6 undecidable manual P 78 37.8288 50 0.48 47
IV.ATVA.EHE. 2020-07-08T18:23:55.88 0.3 undecidable manual P 341 40.4262 50 -0.07 77
IV.MURB.HHZ. 2020-07-08T18:23:55.32 0.3 undecidable manual P 10 36.9297 50 -0.1 77
IT.GNU.HGE. 2020-07-08T18:23:55.20 0.3 undecidable manual S 146 17.5713 120 0.01 81
IV.ATTE.HHZ. 2020-07-08T18:23:54.27 0.3 undecidable manual P 345 30.2475 50 -0.11 77
IV.ATCC.EHZ. 2020-07-08T18:23:54.30 0.3 undecidable manual P 29 31.8459 50 -0.34 74
IT.GNU.HGE. 2020-07-08T18:23:52.12 0.6 undecidable manual P 146 17.5713 120 -0.11 53
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATTE.HHN. ML:1.0 0.00005065 0.18 AML other m 2020-07-08T18:23:59.55
IV.ATCC.EHN. ML:1.1 0.00005995 1.62 AML other m 2020-07-08T18:23:59.91
IV.ATCC.EHE. ML:1.0 0.00005135 0.44 AML other m 2020-07-08T18:24:00.22
IV.ATTE.HHE. ML:1.0 0.00004725 1.82 AML other m 2020-07-08T18:24:00.01
IV.MURB.HHE. ML:1.7 0.0002035 0.36 AML other m 2020-07-08T18:24:01.81
IV.MURB.HHN. ML:1.5 0.000131 0.36 AML other m 2020-07-08T18:24:02.81
IV.ATVO.HHN. ML:1.0 0.0000229 0.32 AML other m 2020-07-08T18:24:05.67
IV.NRCA.HHN. ML:1.0 0.00002735 0.64 AML other m 2020-07-08T18:24:06.60
IV.ATVO.HHE. ML:1.1 0.0000302 0.48 AML other m 2020-07-08T18:24:06.66
IV.NRCA.HHE. ML:1.1 0.0000285 0.14 AML other m 2020-07-08T18:24:07.40
IV.FRON.EHE. ML:1.3 0.00003645 0.06 AML other m 2020-07-08T18:24:31.65
IV.FRON.EHN. ML:1.8 0.000108 0.28 AML other m 2020-07-08T18:24:32.24
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