Earthquake with magnitude of ML 1.3 on date 16-09-2021 and time 13:20:39 (Italy) in region 4 km E Sellano (PG)

A magnitude ML 1.3 earthquake occured in region: 4 km E Sellano (PG), on

  • 16-09-2021 11:20:39 (UTC)
  • 16-09-2021 13:20:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.893, 12.971 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
Sellano PG 4 1079 1079
Preci PG 6 724 1803
Cerreto di Spoleto PG 9 1075 2878
Visso MC 11 1107 3985
Monte Cavallo MC 12 145 4130
Ussita MC 15 444 4574
Norcia PG 15 4957 9531
Castelsantangelo sul Nera MC 15 281 9812
Vallo di Nera PG 16 364 10176
Campello sul Clitunno PG 18 2442 12618
Pieve Torina MC 18 1458 14076
Trevi PG 18 8469 22545
Fiordimonte MC 19 202 22747
Cascia PG 20 3217 25964
Serravalle di Chienti MC 20 1070 27034

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
53 Km E of Perugia (166134 inhabitants)
65 Km W of Teramo (54892 inhabitants)
70 Km NW of L'Aquila (69753 inhabitants)
88 Km NE of Viterbo (67173 inhabitants)
92 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 1.3 2021-09-16
11:20:39
42.8933 12.9712 11 2021-09-16
11:35:31
Sala Sismica INGV-Roma 95506471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-16 11:20:39 ± 0.05
Latitude 42.8933 ± 0.0018
Longitude 12.9712 ± 0.0049
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 95506471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 381
Semi-minor axis of confidence ellipse (meter) 237
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 100
Circular confidence region, given by single value of horizontal uncertainty (meter) 380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.44606
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 95506471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-16 11:35:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GRI.EHZ. 2021-09-16T11:22:35.31 3.0 undecidable manual Sn -9.99 0
IV.CAR1.HHZ. 2021-09-16T11:22:27.38 3.0 undecidable manual Sn -9.55 0
CH.FUORN.HHZ. 2021-09-16T11:22:17.13 3.0 undecidable manual Sn -2.78 0
IV.VOBA.EHZ. 2021-09-16T11:22:13.78 3.0 undecidable manual Sg 17.1 0
MN.TIR.HHZ. 2021-09-16T11:22:11.90 3.0 negative manual Pg 14.06 0
MN.VAE.HHZ. 2021-09-16T11:22:07.46 3.0 negative manual Pg 10.27 0
GU.IMI.HHZ. 2021-09-16T11:22:06.13 3.0 undecidable manual Sn -1.55 0
IV.AGLI.HHZ. 2021-09-16T11:22:04.03 3.0 undecidable manual Sg 5.91 0
IV.GRI.EHZ. 2021-09-16T11:21:59.60 3.0 positive manual Pg 10.25 0
GU.LSD.HHZ. 2021-09-16T11:21:50.35 3.0 positive manual Pn 8.36 0
IV.NDIM.HHZ. 2021-09-16T11:21:48.20 3.0 undecidable manual Sg 10.9 0
GU.BURY.HHZ. 2021-09-16T11:21:43.18 3.0 undecidable manual Pg 13.5 0
GU.ROTM.HHZ. 2021-09-16T11:21:41.87 3.0 negative manual Pg 14.35 0
IV.SBPO.HNZ. 2021-09-16T11:21:35.18 3.0 undecidable manual Sn -5.39 0
IV.PAOL.HHZ. 2021-09-16T11:21:15.59 3.0 undecidable manual Pg 2.25 0
IV.MELA.HHZ. 2021-09-16T11:21:15.13 3.0 positive manual Pg 3.88 0
IV.PTRJ.HHZ. 2021-09-16T11:21:15.08 3.0 undecidable manual Pg 5.48 0
IV.VBKN.HHZ. 2021-09-16T11:21:14.82 3.0 positive manual Pg 0.08 0
IV.RIBO.EHZ.01 2021-09-16T11:21:05.43 3.0 undecidable manual Sn -3.19 0
IV.CPGN.EHZ. 2021-09-16T11:21:05.67 3.0 undecidable manual Sn 2.41 0
IV.PE3.EHZ. 2021-09-16T11:21:05.70 3.0 undecidable manual Sg 5.32 0
IV.PP3.EHZ. 2021-09-16T11:20:56.20 3.0 positive manual Pg 4.41 0
IV.SNTG.HHZ. 2021-09-16T11:20:52.94 0.6 undecidable manual S 356 0.3624 50 0.2 46
IV.MF5.EHZ. 2021-09-16T11:20:52.86 3.0 undecidable manual Pg 3.89 0
IV.ASSB.HHZ. 2021-09-16T11:20:50.13 0.6 undecidable manual S 303 0.2725 50 0.03 49
IV.CPGN.EHZ. 2021-09-16T11:20:50.14 3.0 undecidable manual Pn -0.47 0
IV.SACS.HHZ. 2021-09-16T11:20:50.07 3.0 undecidable manual Sn -1.25 0
IV.CSP1.EHZ. 2021-09-16T11:20:49.63 0.6 undecidable manual S 41 0.2617 50 -0.14 48
IV.MML1.EHZ. 2021-09-16T11:20:48.48 0.6 undecidable manual S 0 0.2203 50 -0.05 49
IV.EL6.EHZ. 2021-09-16T11:20:48.66 1.0 positive manual P 12 0.4461 50 0.11 23
IV.NARO.HHZ. 2021-09-16T11:20:48.47 3.0 positive manual Pn 0.95 0
IV.GAVE.EHZ. 2021-09-16T11:20:48.07 0.6 undecidable manual S 196 0.2086 50 -0.13 48
IV.CRTC.HHZ. 2021-09-16T11:20:47.94 3.0 undecidable manual P -2.84 0
IV.SNTG.HHZ. 2021-09-16T11:20:47.10 0.1 undecidable manual P 356 0.3624 50 -0.01 96
IV.FAGN.HHZ. 2021-09-16T11:20:46.80 3.0 negative manual Pn -7.2 0
IV.FDMO.HHZ. 2021-09-16T11:20:46.56 0.6 undecidable manual S 31 0.1664 120 -0.25 47
IV.MC2.EHZ. 2021-09-16T11:20:46.70 0.6 undecidable manual S 83 0.1601 121 0.09 49
IV.NRCA.HHZ. 2021-09-16T11:20:45.13 0.6 undecidable manual S 120 0.1205 128 -0.21 48
IV.ASSB.HHZ. 2021-09-16T11:20:45.45 0.1 undecidable manual P 303 0.2725 50 -0.14 95
IV.CSP1.EHZ. 2021-09-16T11:20:45.33 0.1 undecidable manual P 41 0.2617 50 -0.07 97
IV.GAVE.EHZ. 2021-09-16T11:20:44.58 0.1 undecidable manual P 196 0.2086 50 0.09 97
IV.MML1.EHZ. 2021-09-16T11:20:44.79 0.1 undecidable manual P 0 0.2203 50 0.1 97
IV.FDMO.HHZ. 2021-09-16T11:20:43.74 0.1 undecidable manual P 31 0.1664 120 0.05 99
IV.MC2.EHZ. 2021-09-16T11:20:43.71 0.1 undecidable manual P 83 0.1601 121 0.14 97
IV.NRCA.HHZ. 2021-09-16T11:20:42.88 0.1 undecidable manual P 120 0.1205 128 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.5 0.000321 0.12 AML other m 2021-09-16T11:20:45.19
IV.NRCA.HHE. ML:1.5 0.000343 0.44 AML other m 2021-09-16T11:20:46.33
IV.FDMO.HHE. ML:1.7 0.000383 0.16 AML other m 2021-09-16T11:20:46.72
IV.FDMO.HHN. ML:1.4 0.0001765 0.14 AML other m 2021-09-16T11:20:46.96
IV.GAVE.EHE. ML:1.4 0.000165 0.22 AML other m 2021-09-16T11:20:48.51
IV.GAVE.EHN. ML:1.4 0.000146 0.3 AML other m 2021-09-16T11:20:48.54
IV.MML1.EHN. ML:1.2 9.47E-5 0.22 AML other m 2021-09-16T11:20:48.83
IV.MML1.EHE. ML:1.1 7.55E-5 0.26 AML other m 2021-09-16T11:20:48.72
IV.SNTG.HHE. ML:0.9 2.755E-5 0.56 AML other m 2021-09-16T11:20:53.98
IV.SNTG.HHN. ML:0.9 2.975E-5 1.4 AML other m 2021-09-16T11:20:54.08
IV.VBKN.HHN. ML:3.5 0.0004945 0.56 AML other m 2021-09-16T11:21:18.40
IV.NDIM.HHN. ML:3.6 0.000571 0.48 AML other m 2021-09-16T11:21:52.15
IV.NDIM.HHE. ML:4 0.001585 0.08 AML other m 2021-09-16T11:22:04.04
IV.VBKN.HHE. ML:3.5 0.00056 0.58 AML other m 2021-09-16T11:22:05.81
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