Earthquake with magnitude of ML 0.5 on date 21-09-2019 and time 21:17:39 (UTC) in region 4 km E Norcia (PG)

A magnitude ML 0.5 earthquake occured in region: 4 km E Norcia (PG), on

  • 21-09-2019 21:17:39 (UTC)
  • 21-09-2019 23:17:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8, 13.14 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 4 4957 4957
Castelsantangelo sul Nera MC 10 281 5238
Preci PG 12 724 5962
Arquata del Tronto AP 14 1178 7140
Cascia PG 14 3217 10357
Visso MC 15 1107 11464
Accumoli RI 15 667 12131
Ussita MC 16 444 12575
Montegallo AP 17 523 13098
Cerreto di Spoleto PG 18 1075 14173
Montemonaco AP 19 604 14777
Poggiodomo PG 19 117 14894
Sellano PG 20 1079 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
49 Km W of Teramo (54892 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
96 Km W of Pescara (121014 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
98 Km NW of Chieti (51815 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
Rev 100 ML 0.5 2019-09-21
21:17:39
42.8 13.14 11 2019-09-21
21:30:41
Sala Sismica INGV-Roma 72628671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-21 21:17:39 ± 0.06
Latitude 42.80 ± 0.00
Longitude 13.14 ± 0.00
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 72628671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 396
Semi-minor axis of confidence ellipse (meter) 254
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 76
Circular confidence region, given by single value of horizontal uncertainty (meter) 400
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.5261
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 14
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 72628671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-21 21:30:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SLCN.HHZ. 2019-09-21T21:19:12.93 3.0 undecidable manual Sg 3.65 0
IV.NDIM.HHZ. 2019-09-21T21:18:58.68 3.0 undecidable manual Sg 5.12 0
IV.CIGN.HHZ. 2019-09-21T21:18:36.57 3.0 undecidable manual Sn -1.26 0
IV.VAGA.HHZ. 2019-09-21T21:18:31.22 3.0 undecidable manual Sg -2.44 0
IV.ORZI.HHZ. 2019-09-21T21:18:27.53 3.0 positive manual Pn -4.45 0
IX.MNT3.HHZ.02 2019-09-21T21:18:18.59 3.0 undecidable manual Pn -1.93 0
IV.SGG.HHZ. 2019-09-21T21:18:10.20 3.0 undecidable manual Pg -0.38 0
IV.ARVD.HHZ. 2019-09-21T21:18:00.27 3.0 undecidable manual S -4.32 0
IV.LRP.EHZ. 2019-09-21T21:18:00.08 3.0 positive manual P -3.27 0
IV.EL6.EHZ. 2019-09-21T21:17:58.10 0.3 undecidable manual S 357 0.5261 50 0.68 78
IV.RM33.EHZ. 2019-09-21T21:17:51.05 0.6 undecidable manual S 169 0.3004 50 0.32 60
IV.CSP1.EHZ. 2019-09-21T21:17:50.50 0.3 undecidable manual S 10 0.2923 50 0.01 96
IV.EL6.EHZ. 2019-09-21T21:17:49.62 0.6 undecidable manual P 357 0.5261 50 -0.16 59
IV.CESI.HNZ. 2019-09-21T21:17:49.51 0.3 undecidable manual S 320 0.2635 50 -0.13 94
IV.SMA1.EHZ. 2019-09-21T21:17:48.32 0.3 undecidable manual S 140 0.2257 50 -0.22 93
IV.FDMO.HHZ. 2019-09-21T21:17:48.58 0.3 undecidable manual S 351 0.2356 50 -0.23 93
IV.LNSS.HHZ. 2019-09-21T21:17:48.28 0.3 undecidable manual S 200 0.2131 50 0.14 95
IV.GAVE.HNZ. 2019-09-21T21:17:48.03 0.3 undecidable manual S 238 0.2104 50 -0.03 97
IT.MTCL.HGZ. 2019-09-21T21:17:47.79 0.6 undecidable manual S 332 0.2149 50 -0.42 60
IV.MTRA.EHE. 2019-09-21T21:17:47.41 0.3 undecidable manual S 104 0.1961 50 -0.24 93
IV.MMO1.EHZ. 2019-09-21T21:17:46.64 0.3 undecidable manual S 55 0.1691 50 -0.19 95
IV.FEMA.HNZ. 2019-09-21T21:17:46.72 0.6 undecidable manual S 338 0.1709 50 -0.17 63
IV.RM33.EHZ. 2019-09-21T21:17:45.72 0.3 undecidable manual P 169 0.3004 50 -0.2 93
IV.MC2.EHZ. 2019-09-21T21:17:45.64 0.3 undecidable manual S 19 0.1142 131 0.49 89
IV.CESI.HNZ. 2019-09-21T21:17:45.36 0.3 undecidable manual P 320 0.2635 50 0.07 96
IV.CSP1.EHZ. 2019-09-21T21:17:45.86 0.3 undecidable manual P 10 0.2923 50 0.08 95
IV.LNSS.HHZ. 2019-09-21T21:17:44.48 0.3 undecidable manual P 200 0.2131 50 0.05 97
IV.GAVE.HNZ. 2019-09-21T21:17:44.46 0.3 undecidable manual P 238 0.2104 50 0.08 96
IV.MTRA.EHE. 2019-09-21T21:17:44.37 0.6 undecidable manual P 104 0.1961 50 0.23 63
IV.SMA1.EHZ. 2019-09-21T21:17:44.80 0.3 undecidable manual P 140 0.2257 50 0.15 95
IT.MTCL.HGZ. 2019-09-21T21:17:44.41 0.6 undecidable manual P 332 0.2149 50 -0.06 65
IV.FDMO.HHZ. 2019-09-21T21:17:44.77 0.3 undecidable manual P 351 0.2356 50 -0.04 97
IV.FEMA.HNZ. 2019-09-21T21:17:43.74 0.6 undecidable manual P 338 0.1709 50 0.04 65
IV.MMO1.EHZ. 2019-09-21T21:17:43.62 0.3 undecidable manual P 55 0.1691 50 -0.05 98
IV.NRCA.HHZ. 2019-09-21T21:17:42.97 0.3 undecidable manual S 331 0.0342 161 -0.39 94
IV.MC2.EHZ. 2019-09-21T21:17:42.89 0.3 undecidable manual P 19 0.1142 131 0.19 96
IV.NRCA.HHZ. 2019-09-21T21:17:41.70 0.3 undecidable manual P 331 0.0342 161 0.04 100
IV.MOMA.HHZ. 2019-09-21T21:17:36.74 3.0 positive manual P -7.07 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:0.4 1.29408545E-5 0.1152 AML other m 2019-09-21T21:17:50.14
IV.NRCA.HHE. ML:1.5 0.0004949729 0.128 AML other m 2019-09-21T21:17:43.64
IV.NRCA.HHN. ML:1.7 0.0007719484 0.1408 AML other m 2019-09-21T21:17:43.06
IV.NRCA.HNE. ML:1.5 0.00047379325 0.1152 AML other m 2019-09-21T21:17:43.64
IV.NRCA.HNN. ML:1.6 0.00068238495 0.1408 AML other m 2019-09-21T21:17:43.07
IV.LNSS.HHE. ML:1.1 7.4762255E-5 0.128 AML other m 2019-09-21T21:17:48.83
IV.LNSS.HHN. ML:1 5.6651055E-5 0.1664 AML other m 2019-09-21T21:17:48.78
IV.FDMO.HHE. ML:0.4 1.386072E-5 0.1152 AML other m 2019-09-21T21:17:50.25
IV.FDMO.HHN. ML:0.6 2.185624E-5 0.0896 AML other m 2019-09-21T21:17:49.45
IV.SMA1.EHE. ML:0.2 1.215968E-5 0.1664 AML other m 2019-09-21T21:17:49.61
IV.RM33.EHE. ML:0.6 1.2710695E-5 0.1792 AML other m 2019-09-21T21:17:54.01
IV.RM33.EHN. ML:0.4 1.18722735E-5 0.32 AML other m 2019-09-21T21:17:52.48
IV.CSP1.EHN. ML:0.5 1.505464E-5 0.2048 AML other m 2019-09-21T21:17:51.80
IV.TERO.HHE. ML:0.2 6.2894705E-6 0.0768 AML other m 2019-09-21T21:17:53.90
IV.TERO.HHN. ML:0.5 7.6757025E-6 0.1024 AML other m 2019-09-21T21:17:54.09
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