Earthquake with magnitude of ML 0.9 on date 21-10-2020 and time 01:29:39 (UTC) in region 5 km N Spoleto (PG)

A magnitude ML 0.9 earthquake occured in region: 5 km N Spoleto (PG), on

  • 21-10-2020 01:29:39 (UTC)
  • 21-10-2020 03:29:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.78, 12.75 at 11 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
Spoleto PG 5 38218 38218
Campello sul Clitunno PG 6 2442 40660
Sant'Anatolia di Narco PG 8 564 41224
Castel Ritaldi PG 9 3278 44502
Vallo di Nera PG 9 364 44866
Scheggino PG 9 461 45327
Trevi PG 12 8469 53796
Cerreto di Spoleto PG 14 1075 54871
Montefalco PG 16 5679 60550
Giano dell'Umbria PG 16 3846 64396
Poggiodomo PG 16 117 64513
Ferentillo TR 17 1913 66426
Massa Martana PG 19 3770 70196
Sellano PG 19 1079 71275
Acquasparta TR 19 4778 76053
Montefranco TR 20 1276 77329

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km S of Foligno (57155 inhabitants)
25 Km NE of Terni (111501 inhabitants)
47 Km SE of Perugia (166134 inhabitants)
66 Km NE of Viterbo (67173 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
79 Km W of Teramo (54892 inhabitants)
86 Km N of Guidonia Montecelio (88673 inhabitants)
90 Km N of Tivoli (56533 inhabitants)
100 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 0.9 2020-10-21
01:29:39
42.77 12.75 11 2020-10-21
02:40:08
Sala Sismica INGV-Roma 83973961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-21 01:29:39 ± 0.08
Latitude 42.77 ± 0.00
Longitude 12.75 ± 0.00
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83973961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 502
Semi-minor axis of confidence ellipse (meter) 415
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 179
Circular confidence region, given by single value of horizontal uncertainty (meter) 500
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.35793
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 83973961
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-21 02:40:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PE3.EHZ. 2020-10-21T01:30:11.73 3.0 undecidable manual S -0.03 0
IV.FDMO.HHZ. 2020-10-21T01:29:53.48 0.6 undecidable manual S 43 0.3579 50 0.46 61
IV.NRCA.HHZ. 2020-10-21T01:29:50.33 0.6 undecidable manual S 77 0.2707 50 -0.11 66
IV.CESI.HHZ. 2020-10-21T01:29:49.58 0.6 undecidable manual S 26 0.2554 50 -0.39 63
IV.CESX.HHZ. 2020-10-21T01:29:48.48 0.6 undecidable manual S 216 0.2068 50 -0.05 68
IV.FDMO.HHZ. 2020-10-21T01:29:47.43 1.0 undecidable manual P 43 0.3579 50 -0.03 33
IV.MOMA.HHZ. 2020-10-21T01:29:46.25 0.6 undecidable manual S 282 0.1376 125 -0.09 68
IV.NRCA.HHZ. 2020-10-21T01:29:46.06 0.3 undecidable manual P 77 0.2707 50 0.09 100
IV.CESI.HHZ. 2020-10-21T01:29:45.60 0.6 undecidable manual P 26 0.2554 50 -0.1 67
IV.GAVE.EHZ. 2020-10-21T01:29:45.99 0.6 undecidable manual S 129 0.1322 126 -0.17 67
IV.CESX.HHZ. 2020-10-21T01:29:44.91 0.6 undecidable manual P 216 0.2068 50 0.04 68
IV.GAVE.EHZ. 2020-10-21T01:29:43.64 0.6 negative manual P 129 0.1322 126 0.14 68
IV.MOMA.HHZ. 2020-10-21T01:29:43.78 0.6 negative manual P 282 0.1376 125 0.17 67
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHE. ML:0.7 3.16813E-5 0.3 AML other m 2020-10-21T01:29:50.10
IV.CESX.HHN. ML:0.7 2.843519E-5 0.56 AML other m 2020-10-21T01:29:50.28
IV.GAVE.EHE. ML:0.9 6.895595E-5 0.1 AML other m 2020-10-21T01:29:46.24
IV.GAVE.EHN. ML:0.7 4.582989E-5 0.2 AML other m 2020-10-21T01:29:46.64
IV.GAVE.HNE. ML:1.2 0.0001473614 3.4104 AML other m 2020-10-21T01:29:52.97
IV.GAVE.HNN. ML:1.3 0.00018731105 1.4696 AML other m 2020-10-21T01:29:52.55
IV.MOMA.HHE. ML:0.8 6.7476455E-5 0.24 AML other m 2020-10-21T01:29:46.86
IV.MOMA.HHN. ML:0.6 3.78283E-5 0.28 AML other m 2020-10-21T01:29:47.49
IV.MOMA.HNE. ML:1.1 0.000108244465 1.5496 AML other m 2020-10-21T01:29:51.58
IV.MOMA.HNN. ML:1.5 0.00028061445 2.3 AML other m 2020-10-21T01:29:53.96
IV.CESI.HNE. ML:1.4 0.000142451 2.32 AML other m 2020-10-21T01:29:48.29
IV.CESI.HNN. ML:1.5 0.0001695743 1.2304 AML other m 2020-10-21T01:29:51.28
IV.CESI.HHE. ML:0.6 2.0452265E-5 5.66 AML other m 2020-10-21T01:30:00.74
IV.CESI.HHN. ML:0.8 3.410333E-5 0.18 AML other m 2020-10-21T01:29:50.18
IV.NRCA.HHE. ML:0.7 2.4053046E-5 0.12 AML other m 2020-10-21T01:29:51.80
IV.NRCA.HHN. ML:0.5 1.698775E-5 0.12 AML other m 2020-10-21T01:29:52.83
IV.NRCA.HNE. ML:1.3 0.000107450905 0.8008 AML other m 2020-10-21T01:29:50.12
IV.NRCA.HNN. ML:1.5 0.000157509865 1.0792 AML other m 2020-10-21T01:30:00.10
IV.FDMO.HHE. ML:0.6 1.351659E-5 5.32 AML other m 2020-10-21T01:29:47.81
IV.FDMO.HHN. ML:0.9 2.3204565E-5 5.22 AML other m 2020-10-21T01:29:57.50
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