Earthquake with magnitude of ML 1.0 on date 17-10-2021 and time 09:01:20 (Italy) in region 4 km NE Sellano (PG)

A magnitude ML 1.0 earthquake occured in region: 4 km NE Sellano (PG), on

  • 17-10-2021 07:01:20 (UTC)
  • 17-10-2021 09:01:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.916, 12.965 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
Sellano PG 4 1079 1079
Preci PG 7 724 1803
Monte Cavallo MC 9 145 1948
Visso MC 10 1107 3055
Cerreto di Spoleto PG 11 1075 4130
Ussita MC 15 444 4574
Castelsantangelo sul Nera MC 16 281 4855
Pieve Torina MC 16 1458 6313
Fiordimonte MC 17 202 6515
Norcia PG 17 4957 11472
Serravalle di Chienti MC 18 1070 12542
Vallo di Nera PG 18 364 12906
Trevi PG 18 8469 21375
Campello sul Clitunno PG 19 2442 23817
Pievebovigliana MC 19 866 24683
Muccia MC 20 915 25598

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
51 Km E of Perugia (166134 inhabitants)
67 Km W of Teramo (54892 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
89 Km NE of Viterbo (67173 inhabitants)
90 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.0 2021-10-17
07:01:20
42.9155 12.9647 11 2021-10-17
07:43:32
Sala Sismica INGV-Roma 96675941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-17 07:01:20 ± 0.05
Latitude 42.9155 ± 0.0027
Longitude 12.9647 ± 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 96675941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 307
Semi-minor axis of confidence ellipse (meter) 266
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 80
Circular confidence region, given by single value of horizontal uncertainty (meter) 310
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 66
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.33994
Number of stations at which the event was observed 37
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 96675941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-17 07:43:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
AC.VLO.HHZ. 2021-10-17T07:02:52.11 3.0 negative manual Pg 18.559999 0
IV.VBKN.HHZ. 2021-10-17T07:02:41.88 3.0 undecidable manual Sg 14.05 0
IV.MTGR.HHZ. 2021-10-17T07:02:40.88 3.0 undecidable manual Pg 22.700001 0
IV.ESCV.HHZ. 2021-10-17T07:02:35.77 3.0 positive manual Pn 9.5 0
IV.ERC.EHZ. 2021-10-17T07:02:31.08 3.0 undecidable manual Pg 15.08 0
IV.VITU.HHZ. 2021-10-17T07:02:29.61 3.0 undecidable manual Sn 5.18 0
MN.TRI.HHZ. 2021-10-17T07:02:26.13 3.0 undecidable manual Sg 2.97 0
IV.TST01.HHZ. 2021-10-17T07:02:24.74 3.0 undecidable manual Sg 11.58 0
IV.LRP.EHZ. 2021-10-17T07:02:19.96 3.0 undecidable manual Sg 15.17 0
IV.RCAV.EHZ. 2021-10-17T07:02:13.17 3.0 undecidable manual Sg 17.92 0
IV.TREG.EHZ. 2021-10-17T07:02:12.11 3.0 undecidable manual Sg 2.39 0
IV.VOBA.EHZ. 2021-10-17T07:02:02.39 3.0 undecidable manual Sn -9.99 0
IX.PGN3.HHZ.02 2021-10-17T07:02:01.65 3.0 undecidable manual Pn 0.59 0
IV.MGR.HHZ. 2021-10-17T07:02:00.90 3.0 undecidable manual Pn -2.4 0
IV.TOLF.HHZ. 2021-10-17T07:01:58.65 3.0 undecidable manual Sg 12.76 0
IV.CAVE.HHZ. 2021-10-17T07:01:57.92 3.0 undecidable manual Sg 1.37 0
IV.VAGA.HNZ. 2021-10-17T07:01:56.98 3.0 undecidable manual Pg 14.64 0
GU.RSP.HNZ. 2021-10-17T07:01:56.30 3.0 undecidable manual Pn 0.41 0
IV.MTMR.EHZ. 2021-10-17T07:01:54.05 3.0 negative manual Pn 1.93 0
IX.RSF3.HHZ.02 2021-10-17T07:01:53.44 3.0 undecidable manual Pn 0.45 0
IX.NSC3.EHZ.02 2021-10-17T07:01:51.43 3.0 undecidable manual Pn -2.19 0
IV.RAVA.EHZ. 2021-10-17T07:01:49.43 3.0 undecidable manual Sn -4.61 0
IV.VIVA.HHZ. 2021-10-17T07:01:38.40 3.0 positive manual Pg 7.56 0
IV.CSP1.EHZ. 2021-10-17T07:01:30.01 0.3 undecidable manual S 45 0.2491 50 0.1 72
IV.ASSB.HHZ. 2021-10-17T07:01:29.93 0.3 undecidable manual S 300 0.2572 50 -0.23 70
IV.GAVE.EHZ. 2021-10-17T07:01:29.25 0.3 undecidable manual S 193 0.2293 50 -0.08 73
IV.MML1.EHZ. 2021-10-17T07:01:28.32 0.3 undecidable manual S 1 0.1979 50 -0.08 73
IV.SNTG.HHZ. 2021-10-17T07:01:27.38 0.3 undecidable manual P 357 0.3399 50 0.09 71
IV.MOMA.HNZ. 2021-10-17T07:01:27.03 0.3 undecidable manual P 249 0.3103 50 0.25 69
IV.MC2.EHZ. 2021-10-17T07:01:27.27 0.3 undecidable manual S 91 0.1646 121 -0.11 73
IV.NRCA.HHZ. 2021-10-17T07:01:26.34 0.3 undecidable manual S 127 0.1367 125 -0.15 73
IV.FDMO.HHZ. 2021-10-17T07:01:26.72 0.3 undecidable manual S 37 0.1502 123 -0.21 72
IV.GAVE.EHZ. 2021-10-17T07:01:25.36 0.3 undecidable manual P 193 0.2293 50 -0.03 73
IV.CSP1.EHZ. 2021-10-17T07:01:25.70 0.3 undecidable manual P 45 0.2491 50 -0.03 73
IV.ASSB.HHZ. 2021-10-17T07:01:25.72 0.3 undecidable manual P 300 0.2572 50 -0.16 71
IV.CESI.HHZ. 2021-10-17T07:01:25.40 0.3 undecidable manual S 334 0.0998 134 0.02 76
IV.MML1.EHZ. 2021-10-17T07:01:25.00 0.3 undecidable manual P 1 0.1979 50 0.14 72
IV.MC2.EHZ. 2021-10-17T07:01:24.64 0.3 undecidable manual P 91 0.1646 121 0.37 69
IV.CESI.HHZ. 2021-10-17T07:01:23.28 0.3 undecidable manual P 334 0.0998 134 0.16 73
IV.NRCA.HHZ. 2021-10-17T07:01:23.74 0.1 undecidable manual P 127 0.1367 125 -0.02 100
IV.FDMO.HHZ. 2021-10-17T07:01:23.99 0.1 undecidable manual P 37 0.1502 123 -0.02 100
IV.RIBO.EHZ.01 2021-10-17T07:01:22.74 3.0 undecidable manual P 2.39 0
IV.BRSN.EHZ. 2021-10-17T07:01:22.63 3.0 undecidable manual Pn -2.71 0
IV.FRON.EHZ. 2021-10-17T07:01:20.59 3.0 undecidable manual P -2.42 0
IV.CSNT.HHZ. 2021-10-17T07:01:18.51 3.0 positive manual P -1.36 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.8 7.215E-5 0.2 AML other m 2021-10-17T07:01:25.67
IV.CESI.HHN. ML:0.9 9.385E-5 0.44 AML other m 2021-10-17T07:01:25.56
IV.NRCA.HHN. ML:1.3 0.0002005 0.1 AML other m 2021-10-17T07:01:26.48
IV.NRCA.HHE. ML:1.2 0.0001595 0.44 AML other m 2021-10-17T07:01:26.56
IV.MML1.EHN. ML:1.2 0.00010085 0.18 AML other m 2021-10-17T07:01:28.59
IV.MML1.EHE. ML:1 6.015E-5 0.52 AML other m 2021-10-17T07:01:28.74
IV.GAVE.EHE. ML:1 5.51E-5 0.3 AML other m 2021-10-17T07:01:29.44
IV.GAVE.EHN. ML:0.8 3.8E-5 1.38 AML other m 2021-10-17T07:01:29.04
IV.VIVA.HHE. ML:3.1 0.000838 1.02 AML other m 2021-10-17T07:01:47.75
IV.VIVA.HHN. ML:3 0.000698 0.66 AML other m 2021-10-17T07:01:48.46
IV.MTMR.EHN. ML:4.3 0.00273 0.42 AML other m 2021-10-17T07:01:55.72
IV.MTMR.EHE. ML:3.8 0.001045 0.42 AML other m 2021-10-17T07:01:55.73
GU.RSP.HNN. ML:4.3 0.0005645 1.44 AML other m 2021-10-17T07:02:01.85
GU.RSP.HNE. ML:4.3 0.000561 1.46 AML other m 2021-10-17T07:02:01.86
IV.NRCA.HNE. ML:1.2 0.00013580667 0.1312 AML other m 2021-10-17T07:01:26.57
IV.NRCA.HNN. ML:1.3 0.00017911438 0.1088 AML other m 2021-10-17T07:01:26.54
IV.FDMO.HHN. ML:0.5 2.511101E-5 0.0992 AML other m 2021-10-17T07:01:26.80
IV.FDMO.HHE. ML:0.6 3.065084E-5 0.1408 AML other m 2021-10-17T07:01:27.10
IV.ASSB.HHN. ML:0.8 3.72482E-5 0.0192 AML other m 2021-10-17T07:01:30.43
IV.ASSB.HHE. ML:1 4.515458E-5 0.16 AML other m 2021-10-17T07:01:30.18
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