Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 09-04-2019 and time 21:42:26 (Italy) in region 5 km NE Norcia (PG)

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

  • 09-04-2019 19:42:26 (UTC)
  • 09-04-2019 21:42:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8240, 13.1320 at 4 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
Castelsantangelo sul Nera MC 8 281 5238
Preci PG 10 724 5962
Visso MC 13 1107 7069
Ussita MC 14 444 7513
Arquata del Tronto AP 15 1178 8691
Cascia PG 15 3217 11908
Montegallo AP 17 523 12431
Accumoli RI 17 667 13098
Cerreto di Spoleto PG 18 1075 14173
Montemonaco AP 18 604 14777
Sellano PG 18 1079 15856

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
49 Km NE of Terni (111501 inhabitants)
50 Km W of Teramo (54892 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
68 Km E of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
97 Km W of Pescara (121014 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km N of Tivoli (56533 inhabitants)
100 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
Reviewed
Rev100 		ML 1.0 2019-04-09
19:42:26		 42.8238 13.132 5 2019-04-09
19:51:47		 Sala Sismica INGV-Roma 67416961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-04-09 19:42:26 ± 0.09
Latitude 42.8238 ± 0.0027
Longitude 13.1320 ± 0.0049
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 67416961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 420
Semi-minor axis of confidence ellipse (meter) 76
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 73
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32016
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 67416961
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-04-09 19:51:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VIVA.HHZ. 2019-04-09T19:42:46.98 3.0 undecidable manual S -0.65 0
IV.MML1.EHE. 2019-04-09T19:42:39.17 0.6 undecidable manual S 338 34.6431 97 0.23 46
IV.RM33.EHE. 2019-04-09T19:42:38.63 0.3 undecidable manual S 169 35.5422 97 -0.62 62
IV.CSP1.EHE. 2019-04-09T19:42:37.38 1.0 undecidable manual S 11 30.3474 98 -0.06 24
IV.VIVA.HHZ. 2019-04-09T19:42:37.52 3.0 positive manual P 2.26 0
IV.ARVD.HHZ. 2019-04-09T19:42:37.70 3.0 negative manual P -0.6 0
IV.SMA1.EHZ. 2019-04-09T19:42:36.39 0.6 undecidable manual S 142 27.1506 99 0.04 48
IV.CESI.HHE. 2019-04-09T19:42:36.56 0.3 undecidable manual S 317 27.2505 99 0.15 71
IV.LNSS.HHE. 2019-04-09T19:42:36.21 0.6 undecidable manual S 197 25.6521 100 0.37 45
IV.FDMO.HHE. 2019-04-09T19:42:35.85 0.6 undecidable manual S 351 23.8539 101 0.61 42
IV.GAVE.EHE. 2019-04-09T19:42:35.64 0.6 undecidable manual S 233 24.2535 101 0.26 46
IV.T1299.EHE. 2019-04-09T19:42:35.98 0.3 undecidable manual S 150 24.3534 100 0.57 64
IV.MTRA.EHZ. 2019-04-09T19:42:34.96 0.3 undecidable manual S 109 22.755 101 0.09 72
IV.MMO1.EHZ. 2019-04-09T19:42:33.02 0.3 undecidable manual S 62 17.871 104 -0.2 71
IV.MML1.EHE. 2019-04-09T19:42:33.58 0.1 undecidable manual P 338 34.6431 97 -0.24 92
IV.RM33.EHE. 2019-04-09T19:42:33.90 0.3 undecidable manual P 169 35.5422 97 -0.1 71
IV.SMA1.EHZ. 2019-04-09T19:42:32.42 0.3 undecidable manual P 142 27.1506 99 0.1 72
IV.CESI.HHE. 2019-04-09T19:42:32.10 0.1 undecidable manual P 317 27.2505 99 -0.25 92
IV.CSP1.EHE. 2019-04-09T19:42:32.71 0.1 undecidable manual P 11 30.3474 98 -0.24 92
IV.LNSS.HHE. 2019-04-09T19:42:31.92 0.3 undecidable manual P 197 25.6521 100 -0.11 72
IV.FDMO.HHE. 2019-04-09T19:42:31.37 0.3 undecidable manual P 351 23.8539 101 -0.31 69
IV.MTRA.EHZ. 2019-04-09T19:42:31.43 0.1 undecidable manual P 109 22.755 101 -0.04 97
IV.MC2.EHZ. 2019-04-09T19:42:31.51 0.3 undecidable manual S 25 10.7781 113 0.65 64
IV.GAVE.EHE. 2019-04-09T19:42:31.97 0.1 undecidable manual P 233 24.2535 101 0.21 94
IV.T1299.EHE. 2019-04-09T19:42:31.75 0.3 undecidable manual P 150 24.3534 100 -0.02 73
IV.MMO1.EHZ. 2019-04-09T19:42:30.29 0.3 undecidable manual P 62 17.871 104 -0.22 71
IV.MC2.EHZ. 2019-04-09T19:42:29.33 0.3 undecidable manual P 25 10.7781 113 0.18 72
IV.NRCA.HHZ. 2019-04-09T19:42:28.29 0.1 undecidable manual S 306 1.7982 158 -0.21 97
IV.NRCA.HHZ. 2019-04-09T19:42:27.70 0.1 undecidable manual P 306 1.7982 158 -0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.HNN. ML:1.3 0.000139348 1.8688 AML other m 2019-04-09T19:42:35.59
IV.MTRA.EHE. ML:0.8 0.000045950000000000006 0.12 AML other m 2019-04-09T19:42:35.39
IV.MTRA.EHN. ML:0.8 0.00004065 1.1 AML other m 2019-04-09T19:42:35.43
IV.MTRA.HNE. ML:1.2 0.000098099415 1.0112 AML other m 2019-04-09T19:42:35.45
IV.NRCA.HHE. ML:0.0 0.0039185695 0.1792 AML other m 2019-04-09T19:42:28.31
IV.NRCA.HHN. ML:0.0 0.0023140125 0.2048 AML other m 2019-04-09T19:42:28.31
IV.NRCA.HNN. ML:0.0 0.001996778 0.0896 AML other m 2019-04-09T19:42:28.49
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