Earthquake with magnitude of ML 1.0 on date 30-09-2020 and time 02:20:49 (Italy) in region 3 km SE San Venanzo (TR)

A magnitude ML 1.0 earthquake occured in region: 3 km SE San Venanzo (TR), on

  • 30-09-2020 00:20:49 (UTC)
  • 30-09-2020 02:20:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.85, 12.29 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
San Venanzo TR 3 2218 2218
Monte Castello di Vibio PG 5 1567 3785
Fratta Todina PG 7 1839 5624
Marsciano PG 8 18902 24526
Todi PG 12 16851 41377
Collazzone PG 13 3473 44850
Parrano TR 15 534 45384
Montegabbione TR 18 1216 46600
Ficulle TR 18 1669 48269
Deruta PG 19 9669 57938

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km S of Perugia (166134 inhabitants)
36 Km W of Foligno (57155 inhabitants)
43 Km NW of Terni (111501 inhabitants)
50 Km NE of Viterbo (67173 inhabitants)
76 Km SE of Arezzo (99543 inhabitants)
93 Km NE of Civitavecchia (52991 inhabitants)
94 Km SE of Siena (53903 inhabitants)
96 Km E of Grosseto (82087 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.0 2020-09-30
00:20:49
42.85 12.29 9 2020-09-30
00:43:37
Sala Sismica INGV-Roma 83373741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-30 00:20:49 ± 0.1
Latitude 42.85 ± 0.01
Longitude 12.29 ± 0.00
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 83373741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 490
Semi-minor axis of confidence ellipse (meter) 321
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 168
Circular confidence region, given by single value of horizontal uncertainty (meter) 490
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.14389
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

Field Value
Value 1
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 83373741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-30 00:43:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ATVO.HHE. 2020-09-30T00:21:09.17 0.6 undecidable manual S 9 0.5414 50 0.39 43
IV.CAFI.HNN. 2020-09-30T00:21:08.88 0.3 undecidable manual S 334 0.5351 50 0.27 66
IV.ATMI.HHZ. 2020-09-30T00:21:07.70 0.3 undecidable manual S 358 0.4865 50 0.54 63
TV.SF14.HHE. 2020-09-30T00:21:07.18 0.6 undecidable manual S 260 0.5018 50 -0.44 43
TV.SF13.HHE. 2020-09-30T00:21:07.18 0.6 undecidable manual S 267 0.4901 50 -0.1 46
IV.ATLO.EHE. 2020-09-30T00:21:07.30 0.3 undecidable manual S 11 0.4757 50 0.47 64
IV.MURB.HHZ. 2020-09-30T00:21:06.42 0.3 undecidable manual S 23 0.4497 50 0.34 66
IV.MCIV.CHE. 2020-09-30T00:21:06.58 0.3 undecidable manual S 261 0.4533 50 0.41 65
IV.ATCC.EHN. 2020-09-30T00:21:05.46 0.3 undecidable manual S 37 0.4245 50 0.14 69
IV.ATVA.EHE. 2020-09-30T00:21:04.84 0.3 undecidable manual S 360 0.4308 50 -0.67 60
IV.ASSB.HHZ. 2020-09-30T00:21:02.60 0.3 undecidable manual S 54 0.3345 50 -0.05 72
IV.CESX.HHZ. 2020-09-30T00:21:02.23 0.6 undecidable manual S 137 0.3247 50 -0.14 47
IV.SACS.HHZ. 2020-09-30T00:21:01.02 0.6 undecidable manual S 270 0.277 50 0.07 48
IV.CAFI.HNN. 2020-09-30T00:21:00.71 0.1 undecidable manual P 334 0.5351 50 0.02 93
TV.SF13.HHE. 2020-09-30T00:21:00.59 0.6 undecidable manual P 267 0.4901 50 0.67 40
IV.ATVO.HHE. 2020-09-30T00:21:00.29 0.1 undecidable manual P 9 0.5414 50 -0.5 84
TV.SF14.HHE. 2020-09-30T00:21:00.15 0.1 undecidable manual P 260 0.5018 50 0.03 93
IV.ATLO.EHE. 2020-09-30T00:20:59.47 0.1 undecidable manual P 11 0.4757 50 -0.19 91
IV.ATMI.HHZ. 2020-09-30T00:20:59.91 0.1 undecidable manual P 358 0.4865 50 0.06 93
IV.MOMA.HHZ. 2020-09-30T00:20:59.05 0.3 undecidable manual S 102 0.2113 111 0.43 68
IV.MURB.HHZ. 2020-09-30T00:20:59.08 0.1 undecidable manual P 23 0.4497 50 -0.15 92
IV.MCIV.CHE. 2020-09-30T00:20:59.23 0.3 undecidable manual P 261 0.4533 50 -0.05 70
IV.ATCC.EHN. 2020-09-30T00:20:58.65 0.1 undecidable manual P 37 0.4245 50 -0.14 93
IV.ATVA.EHE. 2020-09-30T00:20:58.22 0.1 undecidable manual P 360 0.4308 50 -0.68 80
IV.ASSB.HHZ. 2020-09-30T00:20:57.13 0.1 undecidable manual P 54 0.3345 50 -0.12 95
IV.CESX.HHZ. 2020-09-30T00:20:56.58 3.0 undecidable manual P 137 0.3247 50 -0.51 0
IV.SACS.HHZ. 2020-09-30T00:20:56.27 0.1 undecidable manual P 270 0.277 50 0 98
IV.MGAB.HHZ. 2020-09-30T00:20:56.25 0.3 undecidable manual S 297 0.1439 120 -0.01 75
IV.MOMA.HHZ. 2020-09-30T00:20:54.94 0.1 undecidable manual P 102 0.2113 111 0.01 99
IV.MGAB.HHZ. 2020-09-30T00:20:53.59 0.1 negative manual P 297 0.1439 120 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MGAB.HHE. ML:1.1 0.0001245 0.32 AML other m 2020-09-30T00:20:56.52
IV.MGAB.HHN. ML:1.1 0.000111 0.42 AML other m 2020-09-30T00:20:56.67
IV.MOMA.HHN. ML:0.6 2.445E-5 0.56 AML other m 2020-09-30T00:21:00.69
IV.MOMA.HHE. ML:0.7 3.32E-5 0.78 AML other m 2020-09-30T00:21:00.97
IV.SACS.HHE. ML:0.8 3.205E-5 0.72 AML other m 2020-09-30T00:21:03.48
IV.SACS.HHN. ML:0.7 2.6E-5 0.76 AML other m 2020-09-30T00:21:06.76
IV.MURB.HHE. ML:1.3 5.325E-5 1.72 AML other m 2020-09-30T00:21:11.94
IV.MURB.HHN. ML:1.2 4.475E-5 0.3 AML other m 2020-09-30T00:21:11.10
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download