Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 02-09-2020 and time 05:22:44 (Italy) in region 1 km W Scheggino (PG)

A magnitude ML 0.8 earthquake occured in region: 1 km W Scheggino (PG), on

  • 02-09-2020 03:22:44 (UTC)
  • 02-09-2020 05:22:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.71, 12.81 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Scheggino PG 2 461 461
Sant'Anatolia di Narco PG 3 564 1025
Spoleto PG 7 38218 39243
Vallo di Nera PG 8 364 39607
Poggiodomo PG 10 117 39724
Ferentillo TR 10 1913 41637
Campello sul Clitunno PG 13 2442 44079
Montefranco TR 13 1276 45355
Monteleone di Spoleto PG 13 599 45954
Polino TR 14 233 46187
Arrone TR 14 2763 48950
Cerreto di Spoleto PG 15 1075 50025
Cascia PG 16 3217 53242
Castel Ritaldi PG 17 3278 56520
Trevi PG 20 8469 64989

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NE of Terni (111501 inhabitants)
29 Km SE of Foligno (57155 inhabitants)
56 Km SE of Perugia (166134 inhabitants)
62 Km NW of L'Aquila (69753 inhabitants)
67 Km E of Viterbo (67173 inhabitants)
73 Km W of Teramo (54892 inhabitants)
79 Km N of Guidonia Montecelio (88673 inhabitants)
83 Km N of Tivoli (56533 inhabitants)
95 Km N of Roma (2864731 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 0.8 2020-09-02
03:22:44		 42.71 12.81 8 2020-09-02
03:40:45		 Sala Sismica INGV-Roma 82551501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-02 03:22:44 ± 0.08
Latitude 42.71 ± 0.00
Longitude 12.81 ± 0.00
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82551501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 335
Semi-minor axis of confidence ellipse (meter) 275
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 305
Circular confidence region, given by single value of horizontal uncertainty (meter) 330
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.38311
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 13
Type of magnitude ML
Reference to an origin 82551501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-02 03:40:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ROM9.HNZ. 2020-09-02T03:23:03.05 3.0 positive manual P 0.16 0
IV.FDMO.HHZ. 2020-09-02T03:22:58.81 0.1 undecidable manual S 31 0.3831 50 0.11 94
IV.CESI.HHZ. 2020-09-02T03:22:56.32 0.1 undecidable manual S 13 0.3022 104 0.1 95
IV.NRCA.HHZ. 2020-09-02T03:22:54.32 0.1 undecidable manual S 61 0.2527 106 -0.04 97
IV.CESX.HHZ. 2020-09-02T03:22:52.08 0.1 undecidable manual S 239 0.1952 110 -0.21 95
IV.FDMO.HHZ. 2020-09-02T03:22:52.42 0.1 undecidable manual P 31 0.3831 50 -0.17 92
IV.MOMA.HHZ. 2020-09-02T03:22:52.31 0.3 undecidable manual S 298 0.2023 110 -0.23 71
IV.LNSS.HHZ. 2020-09-02T03:22:52.11 0.1 undecidable manual S 123 0.197 110 -0.24 95
IV.CESI.HHZ. 2020-09-02T03:22:51.03 0.1 undecidable manual P 13 0.3022 104 -0.13 95
IV.NRCA.HHZ. 2020-09-02T03:22:50.06 0.1 undecidable manual P 61 0.2527 106 -0.03 98
IV.ARRO.EHZ. 2020-09-02T03:22:50.52 0.3 undecidable manual S 195 0.1358 118 0.35 70
IV.LNSS.HHZ. 2020-09-02T03:22:49.06 0.1 undecidable manual P 123 0.197 110 0.14 97
IV.MOMA.HHZ. 2020-09-02T03:22:49.44 0.1 undecidable manual P 298 0.2023 110 0.41 91
IV.CESX.HHZ. 2020-09-02T03:22:48.59 0.3 undecidable manual P 239 0.1952 110 -0.3 70
IV.ARRO.EHZ. 2020-09-02T03:22:47.75 0.1 undecidable manual P 195 0.1358 118 0.09 99
IV.GAVE.EHZ. 2020-09-02T03:22:47.82 0.1 undecidable manual S 107 0.0612 140 -0.09 100
IV.GAVE.EHZ. 2020-09-02T03:22:46.58 0.1 undecidable manual P 107 0.0612 140 0.22 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHE. ML:0.6 4.75E-5 1.06 AML other m 2020-09-02T03:22:51.10
IV.ARRO.EHN. ML:0.6 4.44E-5 1.72 AML other m 2020-09-02T03:22:51.11
IV.MOMA.HHE. ML:0 3.085E-5 0.58 AML other m 2020-09-02T03:22:53.63
IV.NRCA.HHE. ML:0.8 3.335E-5 0.9 AML other m 2020-09-02T03:22:55.66
IV.NRCA.HHN. ML:0.9 4.15E-5 0.12 AML other m 2020-09-02T03:22:55.84
IV.MOMA.HHN. ML:0 1.835E-5 1.46 AML other m 2020-09-02T03:22:55.95
IV.CESI.HHN. ML:0.9 3.495E-5 1.08 AML other m 2020-09-02T03:22:56.59
IV.CESI.HHE. ML:0.8 2.7E-5 0.2 AML other m 2020-09-02T03:22:56.82
IV.FDMO.HHE. ML:0.7 1.4E-5 0.14 AML other m 2020-09-02T03:22:59.11
IV.FDMO.HHN. ML:0.7 1.42E-5 0.66 AML other m 2020-09-02T03:22:59.12
IV.GAVE.EHE. ML:1 0.0001945864 0.2592 AML other m 2020-09-02T03:22:48.40
IV.GAVE.EHN. ML:0.9 0.0001400046 0.16 AML other m 2020-09-02T03:22:49.83
IV.GAVE.HNE. ML:1.1 0.00021680145 0.2608 AML other m 2020-09-02T03:22:48.53
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