Earthquake with magnitude of ML 1.1 on date 31-10-2020 and time 19:16:01 (Italy) in region 5 km E Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 5 km E Norcia (PG), on

  • 31-10-2020 18:16:01 (UTC)
  • 31-10-2020 19:16:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.787, 13.149 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
Norcia PG 5 4957 4957
Castelsantangelo sul Nera MC 12 281 5238
Arquata del Tronto AP 12 1178 6416
Accumoli RI 13 667 7083
Cascia PG 13 3217 10300
Preci PG 14 724 11024
Montegallo AP 16 523 11547
Visso MC 17 1107 12654
Ussita MC 18 444 13098
Cittareale RI 19 482 13580
Cerreto di Spoleto PG 19 1075 14655
Poggiodomo PG 19 117 14772
Montemonaco AP 19 604 15376

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Foligno (57155 inhabitants)
48 Km W of Teramo (54892 inhabitants)
48 Km NE of Terni (111501 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
71 Km SE of Perugia (166134 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km W of Pescara (121014 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
96 Km NE of Tivoli (56533 inhabitants)
97 Km NW of Chieti (51815 inhabitants)
97 Km SW of Ancona (100861 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 1.1 2020-10-31
18:16:01
42.7872 13.1488 11 2020-10-31
18:35:45
Sala Sismica INGV-Roma 84328781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-31 18:16:01 ± 0.06
Latitude 42.7872 ± 0.0045
Longitude 13.1488 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84328781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 448
Semi-minor axis of confidence ellipse (meter) 324
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 14
Circular confidence region, given by single value of horizontal uncertainty (meter) 450
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.30307
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 84328781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-31 18:35:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
XK.GIZZ.HHZ. 2020-10-31T18:17:35.54 3.0 undecidable manual Sn 2.69 0
IV.CAVE.HHZ. 2020-10-31T18:17:18.61 3.0 undecidable manual Sg 4.08 0
GU.TRAV.HHZ. 2020-10-31T18:17:07.36 3.0 undecidable manual Pg 2.73 0
AC.VLO.HHZ. 2020-10-31T18:17:01.77 3.0 negative manual Pn -3.12 0
IV.PCN.EHZ. 2020-10-31T18:16:49.73 3.0 undecidable manual Pg 3.26 0
IV.SARZ.HHZ. 2020-10-31T18:16:44.66 3.0 positive manual Pn -5.6 0
IV.LRP.EHZ. 2020-10-31T18:16:37.51 3.0 undecidable manual Sg 25.860001 0
IV.BRSN.EHZ. 2020-10-31T18:16:24.09 3.0 undecidable manual Pg -2.08 0
IV.FIR.HHZ. 2020-10-31T18:16:22.01 3.0 positive manual Pg -1.54 0
IV.LRP.EHZ. 2020-10-31T18:16:12.93 3.0 undecidable manual Pg 10.66 0
IV.CESI.HHE. 2020-10-31T18:16:12.13 0.3 undecidable manual S 321 0.2815 50 -0.05 72
IV.RNI2.HHZ. 2020-10-31T18:16:10.75 3.0 undecidable manual P 3.83 0
IV.GAVE.EHZ. 2020-10-31T18:16:10.04 0.3 undecidable manual S 243 0.2095 50 -0.01 74
IV.MTRA.EHZ. 2020-10-31T18:16:09.05 0.3 undecidable manual S 99 0.1844 50 -0.25 69
IV.T1299.EHZ. 2020-10-31T18:16:09.36 0.3 undecidable manual S 147 0.1817 50 0.14 75
IV.SMA1.EHZ. 2020-10-31T18:16:09.92 0.3 undecidable manual S 139 0.2077 50 -0.08 72
IV.MMO1.EHZ. 2020-10-31T18:16:08.86 0.3 undecidable manual S 49 0.1718 50 -0.07 72
IV.MF5.EHZ. 2020-10-31T18:16:08.53 0.3 undecidable manual P 49 0.3031 50 0.56 67
IV.CESI.HHE. 2020-10-31T18:16:07.44 0.3 undecidable manual P 321 0.2815 50 -0.17 71
IV.T1299.EHZ. 2020-10-31T18:16:06.05 0.3 undecidable manual P 147 0.1817 50 0.16 74
IV.SMA1.EHZ. 2020-10-31T18:16:06.26 0.3 undecidable manual P 139 0.2077 50 -0.09 72
IV.LNSS.HHN. 2020-10-31T18:16:06.16 1.0 undecidable manual P 203 0.2005 50 -0.06 24
IV.GAVE.EHZ. 2020-10-31T18:16:06.28 0.3 undecidable manual P 243 0.2095 50 -0.09 73
IV.NRCA.HHZ. 2020-10-31T18:16:05.58 0.3 undecidable manual S 331 0.0531 152 -0.09 77
IV.MTRA.EHZ. 2020-10-31T18:16:05.88 0.3 undecidable manual P 99 0.1844 50 -0.05 73
IV.MMO1.EHZ. 2020-10-31T18:16:05.67 0.1 undecidable manual P 49 0.1718 50 -0.06 98
IV.MC2.EHZ. 2020-10-31T18:16:05.09 0.3 undecidable manual P 13 0.1277 128 0.15 74
IV.FDMO.HHZ. 2020-10-31T18:16:05.01 3.0 undecidable manual Pn -2.8 0
IV.NRCA.HHZ. 2020-10-31T18:16:03.95 0.1 negative manual P 331 0.0531 152 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.2 0.00023243245 0.1024 AML other m 2020-10-31T18:16:05.61
IV.NRCA.HHN. ML:1.3 0.00030300765 0.0768 AML other m 2020-10-31T18:16:05.64
IV.NRCA.HNE. ML:1.2 0.00023566805 0.1152 AML other m 2020-10-31T18:16:05.61
IV.NRCA.HNN. ML:1.2 0.00026335845 0.0768 AML other m 2020-10-31T18:16:05.64
IV.MTRA.EHE. ML:0.6 2.5020915E-5 0.256 AML other m 2020-10-31T18:16:10.78
IV.MTRA.EHN. ML:0.6 2.8695545E-5 0.2432 AML other m 2020-10-31T18:16:10.28
IV.MTRA.HNE. ML:1.2 0.00011475785 0.4736 AML other m 2020-10-31T18:16:11.01
IV.MTRA.HNN. ML:1.3 0.00014065355 2.5472 AML other m 2020-10-31T18:16:12.58
IV.SMA1.EHE. ML:0.5 1.96305545E-5 0.1792 AML other m 2020-10-31T18:16:09.96
IV.SMA1.EHN. ML:0.4 1.467291765E-5 0.1664 AML other m 2020-10-31T18:16:09.95
IV.GAVE.HNE. ML:1.4 0.0001460127 0.5504 AML other m 2020-10-31T18:16:12.58
IV.GAVE.HNN. ML:1.5 0.00017859975 0.6016 AML other m 2020-10-31T18:16:11.48
IV.GAVE.EHE. ML:0.8 3.5916165E-5 0.1408 AML other m 2020-10-31T18:16:11.20
IV.GAVE.EHN. ML:0.7 2.9091414E-5 0.1792 AML other m 2020-10-31T18:16:11.58
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