Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 18-09-2019 and time 23:53:41 (Italy) in region 2 km NE Norcia (PG)

A magnitude ML 1.2 earthquake occured in region: 2 km NE Norcia (PG), on

  • 18-09-2019 21:53:41 (UTC)
  • 18-09-2019 23:53:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8070, 13.1080 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 2 4957 4957
Preci PG 10 724 5681
Castelsantangelo sul Nera MC 11 281 5962
Cascia PG 12 3217 9179
Visso MC 14 1107 10286
Ussita MC 16 444 10730
Cerreto di Spoleto PG 16 1075 11805
Arquata del Tronto AP 16 1178 12983
Accumoli RI 17 667 13650
Sellano PG 17 1079 14729
Poggiodomo PG 18 117 14846
Montegallo AP 19 523 15369

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 inhabitants)
98 Km W of Pescara (121014 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 1.2 2019-09-18
21:53:41		 42.8067 13.1083 10 2020-02-28
16:42:27		 Bollettino Sismico Italiano INGV 76774671
Reviewed
Rev100 		ML 1.2 2019-09-18
21:53:41		 42.812 13.1098 9 2019-09-18
22:03:25		 Sala Sismica INGV-Roma 72535021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-18 21:53:41 ± 0.05
Latitude 42.8067 ± 0.0027
Longitude 13.1083 ± 0.0049
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 76774671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 394
Semi-minor axis of confidence ellipse (meter) 201
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 265
Circular confidence region, given by single value of horizontal uncertainty (meter) 390.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
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) 0.02698
Epicentral distance of station farthest from the epicenter (degree) 0.31476
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 76774671
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-24 14:32:01

ML:1.2

Field Value
Value 1.2
Uncertainty 0.0
Num. used stations 2
Type of magnitude ML
Reference to an origin 72535021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-18 22:03:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHZ. 2019-09-18T21:53:54.40 0.6 undecidable manual S 55 34.9428 50 0.69 41
IV.GUMA.HHZ. 2019-09-18T21:53:53.56 0.6 undecidable manual S 33 33.8439 50 0.13 47
IV.CSP1.EHZ. 2019-09-18T21:53:52.82 0.6 undecidable manual S 14 32.5452 50 -0.27 46
IV.SMA1.EHZ. 2019-09-18T21:53:51.24 0.6 undecidable manual S 137 26.9508 110 -0.27 46
IV.CESI.HHE. 2019-09-18T21:53:51.81 0.6 undecidable manual S 323 27.5502 109 0.1 48
IV.FDMO.HHZ. 2019-09-18T21:53:50.85 0.6 undecidable manual S 356 25.5522 111 -0.22 47
IV.LNSS.HHZ. 2019-09-18T21:53:50.41 0.6 undecidable manual S 194 23.2545 112 0.07 49
IV.GAVE.EHZ. 2019-09-18T21:53:50.17 0.6 undecidable manual S 234 21.5673 114 0.38 46
IT.MTCL.HGZ. 2019-09-18T21:53:50.13 0.6 undecidable manual S 337 22.5552 113 0.02 49
IV.GUMA.HHZ. 2019-09-18T21:53:48.40 0.3 undecidable manual P 33 33.8439 50 -0.03 72
IV.MF5.EHZ. 2019-09-18T21:53:48.57 0.3 undecidable manual P 55 34.9428 50 -0.02 72
IV.FEMA.HNE. 2019-09-18T21:53:48.80 0.6 undecidable manual S 345 17.871 118 0.15 48
IV.CSP1.EHZ. 2019-09-18T21:53:48.01 0.1 undecidable manual P 14 32.5452 50 -0.23 93
IV.MC2.EHZ. 2019-09-18T21:53:47.65 0.6 undecidable manual S 29 13.3755 126 0.35 47
IV.SMA1.EHZ. 2019-09-18T21:53:47.32 0.3 undecidable manual P 137 26.9508 110 0 74
IV.CESI.HHE. 2019-09-18T21:53:47.39 0.1 undecidable manual P 323 27.5502 109 -0.05 97
IV.GAVE.EHZ. 2019-09-18T21:53:46.38 0.3 undecidable manual P 234 21.5673 114 0.05 74
IT.MTCL.HGZ. 2019-09-18T21:53:46.60 0.3 undecidable manual P 337 22.5552 113 0.09 73
IV.FDMO.HHZ. 2019-09-18T21:53:46.95 0.1 undecidable manual P 356 25.5522 111 -0.12 96
IV.LNSS.HHZ. 2019-09-18T21:53:46.52 0.1 undecidable manual P 194 23.2545 112 -0.12 96
IV.MC2.EHZ. 2019-09-18T21:53:45.00 0.1 undecidable manual P 29 13.3755 126 0.11 98
IV.FEMA.HNE. 2019-09-18T21:53:45.44 0.3 undecidable manual P 345 17.871 118 -0.23 71
IV.NRCA.HHZ. 2019-09-18T21:53:44.90 0.3 undecidable manual S 9 2.997 162 -0.19 74
IV.NRCA.HHZ. 2019-09-18T21:53:43.73 0.1 undecidable manual P 9 2.997 162 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.3 0.00034899999999999997 1.9 AML other m 2019-09-18T21:53:45.02
IV.NRCA.HHE. ML:1.2 0.00026900000000000003 1.16 AML other m 2019-09-18T21:53:45.60
IV.LNSS.HHE. ML:1.2 0.00010879999999999999 0.3 AML other m 2019-09-18T21:53:50.60
IV.LNSS.HHN. ML:1.2 0.0001037 0.18 AML other m 2019-09-18T21:53:50.63
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