Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 20-09-2019 and time 16:32:15 (Italy) in region 5 km NW Norcia (PG)

A magnitude ML 1.0 earthquake occured in region: 5 km NW Norcia (PG), on

  • 20-09-2019 14:32:15 (UTC)
  • 20-09-2019 16:32:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8340, 13.0770 at 11 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 5 4957 4957
Preci PG 6 724 5681
Castelsantangelo sul Nera MC 9 281 5962
Visso MC 11 1107 7069
Cerreto di Spoleto PG 13 1075 8144
Ussita MC 13 444 8588
Sellano PG 14 1079 9667
Cascia PG 14 3217 12884
Poggiodomo PG 18 117 13001
Vallo di Nera PG 19 364 13365
Monte Cavallo MC 19 145 13510
Arquata del Tronto AP 19 1178 14688

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
55 Km W of Teramo (54892 inhabitants)
60 Km NW of L'Aquila (69753 inhabitants)
64 Km E of Perugia (166134 inhabitants)
92 Km NE of Viterbo (67173 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
95 Km W of Montesilvano (53738 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km N of Tivoli (56533 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 1.0 2019-09-20
14:32:15		 42.8338 13.0768 11 2020-02-28
16:42:02		 Bollettino Sismico Italiano INGV 73706491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-20 14:32:15 ± 0.05
Latitude 42.8338 ± 0.0018
Longitude 13.0768 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 73706491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 335
Semi-minor axis of confidence ellipse (meter) 230
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 83
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
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 33
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.37232
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 73706491
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-11-07 10:58:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HNZ. 2019-09-20T14:32:29.30 0.3 undecidable manual S 266 41.3253 90 0.54 66
IV.RM33.HNZ. 2019-09-20T14:32:28.01 0.3 undecidable manual S 163 37.7289 90 0.22 72
IV.ARRO.EHZ. 2019-09-20T14:32:27.62 3.0 undecidable manual P 0
IV.PF6.EHZ. 2019-09-20T14:32:27.06 0.3 undecidable manual S 16 35.0427 90 -0.01 76
IV.MML1.HNZ. 2019-09-20T14:32:26.19 0.3 undecidable manual S 345 32.1456 90 -0.12 75
IV.CSP1.EHZ. 2019-09-20T14:32:25.82 0.3 undecidable manual S 20 30.4473 90 -0.03 76
IV.MTRA.HNZ. 2019-09-20T14:32:25.22 0.3 undecidable manual S 108 27.3504 90 0.19 74
IV.FOPC.HGZ. 2019-09-20T14:32:25.19 3.0 undecidable manual Sg 0
IV.LNSS.HHZ. 2019-09-20T14:32:24.33 0.3 undecidable manual S 187 25.752 90 -0.28 73
IV.FOPC.HGZ. 2019-09-20T14:32:23.06 3.0 undecidable manual P 0
IV.MMO1.EHZ. 2019-09-20T14:32:23.27 0.3 undecidable manual S 70 21.5673 91 -0.21 74
IV.FDMO.HHZ. 2019-09-20T14:32:23.60 0.3 undecidable manual S 2 22.4553 91 -0.12 76
IV.MOMA.HNZ. 2019-09-20T14:32:23.43 1.0 undecidable manual P 266 41.3253 90 0.37 23
IV.CESI.HHZ. 2019-09-20T14:32:23.90 0.3 undecidable manual S 324 23.5542 91 -0.11 76
IV.GAVE.EHZ. 2019-09-20T14:32:23.29 0.6 undecidable manual S 223 21.6672 91 -0.2 50
IT.MTCL.HGZ. 2019-09-20T14:32:22.51 0.3 undecidable manual S 341 18.87 91 -0.23 75
IV.PF6.EHZ. 2019-09-20T14:32:22.01 1.0 undecidable manual P 16 35.0427 90 -0.07 25
IV.RM33.HNZ. 2019-09-20T14:32:22.24 0.3 undecidable manual P 163 37.7289 90 -0.26 72
IV.MML1.HNZ. 2019-09-20T14:32:21.46 1.0 undecidable manual P 345 32.1456 90 -0.18 25
IV.CSP1.EHZ. 2019-09-20T14:32:21.58 0.6 undecidable manual P 20 30.4473 90 0.21 49
IV.MC2.EHZ. 2019-09-20T14:32:21.33 0.3 undecidable manual S 47 12.5763 106 0.25 74
IV.FEMA.HNZ. 2019-09-20T14:32:21.44 0.3 undecidable manual S 351 14.3745 95 -0.12 77
IV.CESI.HHZ. 2019-09-20T14:32:20.28 0.3 undecidable manual P 324 23.5542 91 -0.03 77
IV.GAVE.EHZ. 2019-09-20T14:32:20.05 0.3 undecidable manual P 223 21.6672 91 0.04 77
IV.MMO1.EHZ. 2019-09-20T14:32:20.18 0.3 undecidable manual P 70 21.5673 91 0.17 75
IV.LNSS.HHZ. 2019-09-20T14:32:20.35 0.6 undecidable manual P 187 25.752 90 -0.3 48
IV.FDMO.HHZ. 2019-09-20T14:32:20.15 0.3 undecidable manual P 2 22.4553 91 0 77
IV.MTRA.HNZ. 2019-09-20T14:32:20.79 0.3 undecidable manual P 108 27.3504 90 -0.11 75
IV.FEMA.HNZ. 2019-09-20T14:32:19.10 0.3 undecidable manual P 351 14.3745 95 0.2 75
IT.MTCL.HGZ. 2019-09-20T14:32:19.53 0.3 undecidable manual P 341 18.87 91 -0.05 77
IV.MC2.EHZ. 2019-09-20T14:32:18.83 0.1 negative manual P 47 12.5763 106 0.21 100
IV.NRCA.HHZ. 2019-09-20T14:32:18.94 0.3 undecidable manual S 91 2.997 160 -0.34 76
IV.NRCA.HHZ. 2019-09-20T14:32:17.59 0.3 undecidable manual P 91 2.997 160 0.01 79
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.HNE. ML:1.0 0.000072988575 0.1472 AML other m 2019-09-20T14:32:24.03
IV.GAVE.EHN. ML:0.9 0.00005417925 0.16 AML other m 2019-09-20T14:32:24.14
IV.GAVE.EHE. ML:1.1 0.00008069716 0.1792 AML other m 2019-09-20T14:32:24.12
IV.FDMO.HHE. ML:0.9 0.000057080199999999996 0.1024 AML other m 2019-09-20T14:32:23.84
IV.FDMO.HHN. ML:0.9 0.000057334995 0.1024 AML other m 2019-09-20T14:32:24.18
IV.CESI.HHN. ML:1.2 0.00010411168 0.2624 AML other m 2019-09-20T14:32:24.03
IV.CESI.HHE. ML:1.0 0.0000641839 0.1408 AML other m 2019-09-20T14:32:24.48
IV.CESI.HNE. ML:1.0 0.00006172248499999999 0.2176 AML other m 2019-09-20T14:32:24.02
IV.CESI.HNN. ML:1.1 0.00006985997999999998 0.0768 AML other m 2019-09-20T14:32:24.29
IV.LNSS.HNE. ML:1.2 0.000082861535 0.1152 AML other m 2019-09-20T14:32:24.61
IV.LNSS.HHE. ML:1.3 0.00010365567 0.096 AML other m 2019-09-20T14:32:24.83
IV.LNSS.HHN. ML:1.0 0.000059506015000000004 0.16 AML other m 2019-09-20T14:32:24.70
IV.CSP1.EHN. ML:0.8 0.000029801269999999997 0.0576 AML other m 2019-09-20T14:32:27.88
IV.CSP1.EHE. ML:0.7 0.000023734605 0.1024 AML other m 2019-09-20T14:32:26.20
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