Earthquake with magnitude of ML 1.1 on date 18-10-2021 and time 13:16:01 (UTC) in region 6 km NE Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 6 km NE Norcia (PG), on

  • 18-10-2021 13:16:01 (UTC)
  • 18-10-2021 15:16:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.83, 13.154 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.

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 6 4957 4957
Castelsantangelo sul Nera MC 7 281 5238
Preci PG 11 724 5962
Visso MC 13 1107 7069
Ussita MC 13 444 7513
Arquata del Tronto AP 13 1178 8691
Montegallo AP 15 523 9214
Montemonaco AP 16 604 9818
Cascia PG 17 3217 13035
Accumoli RI 17 667 13702
Bolognola MC 19 142 13844
Cerreto di Spoleto PG 19 1075 14919
Sellano PG 20 1079 15998
Montefortino FM 20 1178 17176

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Foligno (57155 inhabitants)
49 Km W of Teramo (54892 inhabitants)
51 Km NE of Terni (111501 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
96 Km W of Pescara (121014 inhabitants)
97 Km E of Viterbo (67173 inhabitants)
99 Km NW of Chieti (51815 inhabitants)
99 Km NE of Guidonia Montecelio (88673 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 2021-10-18
13:16:01
42.8297 13.1545 10 2021-10-18
13:27:25
Sala Sismica INGV-Roma 96727491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-18 13:16:01 ± 0.05
Latitude 42.8297 ± 0.0027
Longitude 13.1545 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96727491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 454
Semi-minor axis of confidence ellipse (meter) 208
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 59
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) 95
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.31386
Number of stations at which the event was observed 11
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 20
Type of magnitude ML
Reference to an origin 96727491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-18 13:27:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EL6.EHZ. 2021-10-18T13:16:20.35 3.0 undecidable manual S -0.11 0
IV.MML1.EHZ. 2021-10-18T13:16:13.88 0.3 undecidable manual S 335 0.3139 50 -0.01 73
IV.CSP1.EHZ. 2021-10-18T13:16:12.39 0.3 undecidable manual S 8 0.2644 50 -0.04 73
IV.SMA1.EHZ. 2021-10-18T13:16:11.55 0.1 undecidable manual S 146 0.2392 50 -0.13 96
IV.LNSS.HHZ. 2021-10-18T13:16:11.92 0.3 undecidable manual S 200 0.2419 50 0.17 71
IV.CESI.HHZ. 2021-10-18T13:16:11.98 0.3 undecidable manual S 314 0.2536 50 -0.12 72
IT.MTCL.HGN. 2021-10-18T13:16:10.03 0.3 undecidable manual S 325 0.1996 115 -0.36 69
IV.MTRA.EHZ. 2021-10-18T13:16:09.84 0.3 undecidable manual S 112 0.1916 116 -0.28 70
IV.MML1.EHZ. 2021-10-18T13:16:08.88 0.3 undecidable manual P 335 0.3139 50 0.05 72
IV.FEMA.HNN. 2021-10-18T13:16:08.75 0.3 undecidable manual S 330 0.1529 121 -0.05 74
IV.CSP1.EHZ. 2021-10-18T13:16:07.95 0.1 undecidable manual P 8 0.2644 50 -0.05 97
IV.SMA1.EHZ. 2021-10-18T13:16:07.54 0.1 undecidable manual P 146 0.2392 50 -0.02 98
IV.MC2.EHZ. 2021-10-18T13:16:07.03 0.1 undecidable manual S 17 0.0854 137 0.27 96
IV.LNSS.HHZ. 2021-10-18T13:16:07.79 0.1 undecidable manual P 200 0.2419 50 0.19 95
IV.CESI.HHZ. 2021-10-18T13:16:07.77 0.1 undecidable manual P 314 0.2536 50 -0.03 98
IV.MTRA.EHZ. 2021-10-18T13:16:06.61 0.1 undecidable manual P 112 0.1916 116 -0.05 99
IV.FEMA.HNN. 2021-10-18T13:16:06.06 0.1 undecidable manual P 330 0.1529 121 0.16 97
IT.MTCL.HGN. 2021-10-18T13:16:06.71 0.3 undecidable manual P 325 0.1996 115 -0.11 73
IV.NRCA.HNZ. 2021-10-18T13:16:05.41 0.1 undecidable manual S 278 0.0297 162 -0.24 98
IV.MC2.EHZ. 2021-10-18T13:16:05.04 0.1 undecidable manual P 17 0.0854 137 0.32 95
IV.NRCA.HNZ. 2021-10-18T13:16:04.21 0.1 undecidable manual P 278 0.0297 162 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:1.7 0.0009256323 0.128 AML other m 2021-10-18T13:16:05.54
IV.NRCA.HHE. ML:1.7 0.00094613835 0.1152 AML other m 2021-10-18T13:16:05.54
IV.NRCA.HNN. ML:1.6 0.00078581485 0.1024 AML other m 2021-10-18T13:16:05.99
IV.NRCA.HHN. ML:1.7 0.00087382325 0.1216 AML other m 2021-10-18T13:16:05.49
IV.MTRA.EHE. ML:1.2 0.00011195 0.32 AML other m 2021-10-18T13:16:10.43
IV.MTRA.EHN. ML:1.2 9.987628E-5 0.2432 AML other m 2021-10-18T13:16:10.48
IV.CESI.HHE. ML:1 5.603211E-5 0.1856 AML other m 2021-10-18T13:16:12.15
IV.LNSS.HHE. ML:1 6.18E-5 0.28 AML other m 2021-10-18T13:16:12.39
IV.LNSS.HHN. ML:1.1 7.36E-5 0.32 AML other m 2021-10-18T13:16:12.25
IV.CESI.HHN. ML:1.4 0.0001235 0.14 AML other m 2021-10-18T13:16:12.32
IV.MML1.EHE. ML:0.8 2.7490695E-5 0.1344 AML other m 2021-10-18T13:16:14.64
IV.MML1.EHN. ML:0.7 2.12265E-5 0.1792 AML other m 2021-10-18T13:16:14.52
IV.EL6.EHE. ML:0.9 2.2118205E-5 0.4416 AML other m 2021-10-18T13:16:22.50
IV.EL6.EHN. ML:1.2 4.204412E-5 8.9408 AML other m 2021-10-18T13:16:20.71
IV.MTRA.HNE. ML:1.3 0.000125408625 0.1536 AML other m 2021-10-18T13:16:10.43
IV.MTRA.HNN. ML:1.3 0.0001335614 0.7872 AML other m 2021-10-18T13:16:10.47
IV.SMA1.EHE. ML:0.8 3.327832E-5 0.1792 AML other m 2021-10-18T13:16:13.13
IV.SMA1.EHN. ML:0.7 3.090711E-5 0.3968 AML other m 2021-10-18T13:16:15.38
IV.CSP1.EHE. ML:1 4.70491E-5 0.1408 AML other m 2021-10-18T13:16:12.00
IV.CSP1.EHN. ML:1 4.2568818E-5 0.2752 AML other m 2021-10-18T13:16:13.20
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