Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 20-09-2019 and time 15:45:34 (Italy) in region 4 km E Norcia (PG)

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

  • 20-09-2019 13:45:34 (UTC)
  • 20-09-2019 15:45:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8080, 13.1360 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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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 11 724 5962
Arquata del Tronto AP 14 1178 7140
Cascia PG 14 3217 10357
Visso MC 14 1107 11464
Ussita MC 15 444 11908
Accumoli RI 15 667 12575
Montegallo AP 17 523 13098
Cerreto di Spoleto PG 18 1075 14173
Montemonaco AP 19 604 14777
Sellano PG 19 1079 15856
Poggiodomo PG 20 117 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)
69 Km E of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km W of Pescara (121014 inhabitants)
98 Km N of Tivoli (56533 inhabitants)
99 Km NW of Chieti (51815 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.3 2019-09-20
13:45:34		 42.8075 13.1363 10 2020-02-28
16:42:01		 Bollettino Sismico Italiano INGV 73706241
Reviewed
Rev100 		ML 1.3 2019-09-20
13:45:34		 42.7943 13.1392 9 2019-09-20
13:59:16		 Sala Sismica INGV-Roma 72587671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-20 13:45:34 ± 0.05
Latitude 42.8075 ± 0.0027
Longitude 13.1363 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 73706241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 322
Semi-minor axis of confidence ellipse (meter) 264
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 274
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 58
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.41549
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 72587671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-20 13:59:16

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 15
Type of magnitude ML
Reference to an origin 73706241
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-11-07 10:41:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2019-09-20T13:45:53.87 3.0 undecidable manual S -0.31 0
IT.GNU.HGE. 2019-09-20T13:45:50.29 0.6 undecidable manual S 270 46.1205 50 0.55 43
IV.MOMA.HNZ. 2019-09-20T13:45:50.16 0.3 undecidable manual S 270 46.1205 50 0.41 66
IV.TERO.HHZ. 2019-09-20T13:45:48.90 0.3 undecidable manual S 118 43.3233 50 -0.1 71
IV.RM33.EHZ. 2019-09-20T13:45:46.30 0.3 undecidable manual S 169 33.744 50 -0.15 72
IV.MNTT.EHZ. 2019-09-20T13:45:44.56 3.0 negative manual P 0.77 0
IV.SMA1.EHZ. 2019-09-20T13:45:44.10 0.3 undecidable manual S 140 25.4523 50 -0.14 73
IT.GNU.HGE. 2019-09-20T13:45:43.54 3.0 undecidable manual P 270 46.1205 50 0.13 0
IV.LNSS.HHZ. 2019-09-20T13:45:43.80 0.3 undecidable manual S 199 24.0537 113 0 75
IV.GAVE.EHE. 2019-09-20T13:45:43.40 0.3 undecidable manual S 237 23.4543 113 -0.23 72
IV.MTRA.EHZ. 2019-09-20T13:45:43.10 0.3 undecidable manual S 105 21.9669 115 -0.03 75
IV.MOMA.HNZ. 2019-09-20T13:45:43.80 0.3 undecidable manual P 270 46.1205 50 0.39 67
IT.MTCL.HGZ. 2019-09-20T13:45:43.12 0.3 undecidable manual S 332 23.4543 113 -0.5 68
IV.FDMO.HHZ. 2019-09-20T13:45:43.90 0.3 undecidable manual S 351 25.752 50 -0.41 69
IV.MMO1.EHE. 2019-09-20T13:45:42.20 0.3 undecidable manual S 57 18.5703 118 0.12 74
IV.TERO.HHZ. 2019-09-20T13:45:42.73 0.6 undecidable manual P 118 43.3233 50 -0.25 46
IV.CAMP.HHZ. 2019-09-20T13:45:41.78 1.0 undecidable manual P 143 37.4292 50 -0.3 23
IV.RM33.EHZ. 2019-09-20T13:45:41.40 0.3 undecidable manual P 169 33.744 50 -0.11 72
IV.FEMA.HNZ. 2019-09-20T13:45:41.90 0.3 undecidable manual S 338 18.5703 118 -0.18 73
IV.FDMO.HHZ. 2019-09-20T13:45:40.11 0.3 undecidable manual P 351 25.752 50 -0.16 72
IV.MC2.EHE. 2019-09-20T13:45:40.60 0.3 undecidable manual S 20 12.2766 129 0.33 72
IV.SMA1.EHZ. 2019-09-20T13:45:40.61 0.6 undecidable manual P 140 25.4523 50 0.37 46
IV.MMO1.EHE. 2019-09-20T13:45:39.04 0.1 undecidable manual P 57 18.5703 118 0.05 100
IV.LNSS.HHZ. 2019-09-20T13:45:39.89 0.1 undecidable manual P 199 24.0537 113 -0.09 98
IV.FEMA.HNZ. 2019-09-20T13:45:39.25 0.6 undecidable manual P 338 18.5703 118 0.26 48
IV.GAVE.EHE. 2019-09-20T13:45:39.85 0.3 undecidable manual P 237 23.4543 113 -0.03 75
IT.MTCL.HGZ. 2019-09-20T13:45:39.73 0.1 undecidable manual P 332 23.4543 113 -0.15 97
IV.MTRA.EHZ. 2019-09-20T13:45:39.69 0.1 undecidable manual P 105 21.9669 115 0.1 99
IV.NRCA.HHE. 2019-09-20T13:45:38.20 0.3 undecidable manual S 328 3.3966 161 -0.25 74
IV.MC2.EHE. 2019-09-20T13:45:38.28 0.1 positive manual P 20 12.2766 129 0.34 95
IV.NRCA.HHE. 2019-09-20T13:45:37.07 0.1 negative manual P 328 3.3966 161 0.18 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1.2 0.00010520789999999999 0.1216 AML other m 2019-09-20T13:45:44.09
IV.MTRA.HNE. ML:1.2 0.00010845560500000001 0.2112 AML other m 2019-09-20T13:45:43.92
IV.MTRA.HNN. ML:1.3 0.00013151344000000002 0.16 AML other m 2019-09-20T13:45:43.69
IV.MTRA.EHN. ML:1.3 0.0001298123 0.16 AML other m 2019-09-20T13:45:43.69
IV.SMA1.EHE. ML:1.2 0.000093838615 0.1856 AML other m 2019-09-20T13:45:46.76
IV.SMA1.EHN. ML:1.3 0.00010426875 0.2368 AML other m 2019-09-20T13:45:45.11
IV.RM33.HNN. ML:1.2 0.000071640525 0.16 AML other m 2019-09-20T13:45:47.72
IV.RM33.HNE. ML:1.4 0.000095350895 0.2496 AML other m 2019-09-20T13:45:48.61
IV.RM33.EHE. ML:1.2 0.00007515987000000001 0.1216 AML other m 2019-09-20T13:45:48.08
IV.RM33.EHN. ML:1.2 0.000059508875 0.224 AML other m 2019-09-20T13:45:48.06
IV.TERO.HNN. ML:0.9 0.000023636814999999998 0.16 AML other m 2019-09-20T13:45:49.12
IV.TERO.HHE. ML:1.2 0.00004388599999999999 0.1216 AML other m 2019-09-20T13:45:49.88
IV.TERO.HHN. ML:1.0 0.000032820519999999997 0.0832 AML other m 2019-09-20T13:45:50.21
IV.MNTT.EHN. ML:1.6 0.00011079274999999999 0.1792 AML other m 2019-09-20T13:45:54.05
IV.MNTT.EHE. ML:1.6 0.00009926836 0.16 AML other m 2019-09-20T13:45:54.11
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