Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 20-09-2019 and time 17:07:54 (Italy) in region 5 km E Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 5 km E Norcia (PG), on

  • 20-09-2019 15:07:54 (UTC)
  • 20-09-2019 17:07:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7710, 13.1500 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.

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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 5 4957 4957
Accumoli RI 12 667 5624
Arquata del Tronto AP 12 1178 6802
Cascia PG 13 3217 10019
Castelsantangelo sul Nera MC 14 281 10300
Preci PG 15 724 11024
Cittareale RI 17 482 11506
Montegallo AP 17 523 12029
Visso MC 19 1107 13136
Poggiodomo PG 19 117 13253
Amatrice RI 19 2657 15910
Ussita MC 19 444 16354
Cerreto di Spoleto PG 20 1075 17429

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km SE of Foligno (57155 inhabitants)
47 Km W of Teramo (54892 inhabitants)
47 Km NE of Terni (111501 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
72 Km SE of Perugia (166134 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km W of Pescara (121014 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
94 Km NE of Tivoli (56533 inhabitants)
96 Km W of Chieti (51815 inhabitants)
99 Km SW of Ancona (100861 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
Reviewed
Rev100 		ML 1.1 2019-09-20
15:07:54		 42.7708 13.1498 10 2019-09-20
15:30:19		 Sala Sismica INGV-Roma 72588871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-20 15:07:54 ± 0.06
Latitude 42.7708 ± 0.0036
Longitude 13.1498 ± 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 72588871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 408
Semi-minor axis of confidence ellipse (meter) 276
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 135
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.36512
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 72588871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-20 15:30:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.IACL.HHZ. 2019-09-20T15:09:47.79 3.0 undecidable manual Sn -2.23 0
IV.MGR.HHZ. 2019-09-20T15:09:19.70 3.0 undecidable manual Sn -1.47 0
IV.RESU.HHZ. 2019-09-20T15:09:10.41 3.0 positive manual Pn -0.05 0
IV.MNTV.HNZ. 2019-09-20T15:08:40.94 3.0 undecidable manual Pn 0.81 0
IV.LAV9.HNZ. 2019-09-20T15:08:32.60 3.0 undecidable manual S -0.87 0
IV.IMOL.HNZ. 2019-09-20T15:08:29.43 3.0 positive manual Pg 3.57 0
IV.FIR.HHZ. 2019-09-20T15:08:24.32 3.0 undecidable manual Pn 0.47 0
IV.PTRJ.HHZ. 2019-09-20T15:08:23.62 3.0 negative manual Pg 0.85 0
IV.MODR.HHZ. 2019-09-20T15:08:19.51 3.0 undecidable manual Pn -3.32 0
IV.ARVD.HHZ. 2019-09-20T15:08:16.39 3.0 undecidable manual S -3.58 0
IV.TERO.HHZ. 2019-09-20T15:08:07.68 0.6 undecidable manual S 114 40.5261 50 -0.16 47
IV.MF5.EHZ. 2019-09-20T15:08:06.77 0.6 undecidable manual S 46 34.8429 50 0.44 45
IV.CSP1.EHZ. 2019-09-20T15:08:06.28 0.6 undecidable manual S 7 35.9418 50 -0.33 46
IV.LNSS.HHZ. 2019-09-20T15:08:02.22 0.6 undecidable manual S 206 20.6682 116 -0.03 50
IV.SMA1.EHZ. 2019-09-20T15:08:02.34 0.6 undecidable manual S 136 21.6672 114 -0.23 48
IV.MMO1.EHZ. 2019-09-20T15:08:02.00 0.6 undecidable manual S 45 20.2686 116 -0.12 49
IV.GAVE.EHZ. 2019-09-20T15:08:02.69 0.6 undecidable manual S 247 22.5552 114 -0.17 49
IV.TERO.HHZ. 2019-09-20T15:08:02.42 0.6 undecidable manual P 114 40.5261 50 0.3 46
IV.MTRA.EHZ. 2019-09-20T15:08:02.06 0.6 undecidable manual S 94 20.1687 116 -0.03 50
IV.CSP1.EHZ. 2019-09-20T15:08:01.04 0.1 undecidable manual P 7 35.9418 50 -0.37 91
IV.MF5.EHZ. 2019-09-20T15:08:01.54 0.1 undecidable manual P 46 34.8429 50 0.29 92
IV.SMA1.EHZ. 2019-09-20T15:07:59.11 0.1 undecidable manual P 136 21.6672 114 0.03 100
IV.GAVE.EHZ. 2019-09-20T15:07:59.31 0.6 negative manual P 247 22.5552 114 0.07 49
IV.MTRA.EHZ. 2019-09-20T15:07:58.76 0.1 undecidable manual P 94 20.1687 116 -0.04 100
IV.NRCA.HNZ. 2019-09-20T15:07:58.66 0.6 undecidable manual S 337 7.5813 143 0.05 51
IV.LNSS.HHZ. 2019-09-20T15:07:58.96 0.1 undecidable manual P 206 20.6682 116 0.07 99
IV.MMO1.EHZ. 2019-09-20T15:07:58.72 0.1 undecidable manual P 45 20.2686 116 -0.1 99
IV.NRCA.HNZ. 2019-09-20T15:07:57.03 0.1 undecidable manual P 337 7.5813 143 0.24 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.8 0.00103121935 0.1408 AML other m 2019-09-20T15:07:58.91
IV.NRCA.HHN. ML:1.7 0.0008277918 0.0768 AML other m 2019-09-20T15:07:58.83
IV.NRCA.HNE. ML:1.8 0.00095326075 0.1024 AML other m 2019-09-20T15:07:58.91
IV.NRCA.HNN. ML:1.7 0.0007871203 0.128 AML other m 2019-09-20T15:07:58.95
IV.MTRA.EHE. ML:0.8 0.00005184758349999999 0.1792 AML other m 2019-09-20T15:08:03.16
IV.MTRA.EHN. ML:0.8 0.00004265671 0.32 AML other m 2019-09-20T15:08:02.41
IV.LNSS.HHE. ML:1.1 0.00009589151999999999 0.1152 AML other m 2019-09-20T15:08:02.75
IV.LNSS.HHN. ML:1.0 0.000077657185 0.1152 AML other m 2019-09-20T15:08:02.78
IV.SMA1.EHE. ML:0.8 0.000039247765000000005 3.6736 AML other m 2019-09-20T15:08:04.35
IV.SMA1.EHN. ML:0.7 0.000034314755 1.2928 AML other m 2019-09-20T15:08:02.68
IV.GAVE.EHE. ML:1.3 0.00012827270000000002 0.1152 AML other m 2019-09-20T15:08:03.48
IV.GAVE.EHN. ML:1.3 0.00013448940500000001 0.1408 AML other m 2019-09-20T15:08:03.28
IV.CSP1.EHE. ML:1.1 0.00004772332 1.6768 AML other m 2019-09-20T15:08:08.18
IV.CSP1.EHN. ML:1.0 0.00003701241 1.472 AML other m 2019-09-20T15:08:07.23
IV.MF5.EHE. ML:1.0 0.0000470507375 3.0464 AML other m 2019-09-20T15:08:09.00
IV.MF5.EHN. ML:1.0 0.00004686214 1.6 AML other m 2019-09-20T15:08:07.73
IV.TERO.HHE. ML:1.0 0.000029831395 0.0768 AML other m 2019-09-20T15:08:07.97
IV.TERO.HHN. ML:1.1 0.00003812625 0.0768 AML other m 2019-09-20T15:08:08.36
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