Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 31-03-2019 and time 03:43:33 (UTC) in region 6 km E Norcia (PG)

A magnitude ML 1.3 earthquake occured in region: 6 km E Norcia (PG), on

  • 31-03-2019 03:43:33 (UTC)
  • 31-03-2019 05:43:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7670, 13.1590 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 6 4957 4957
Accumoli RI 11 667 5624
Arquata del Tronto AP 11 1178 6802
Cascia PG 13 3217 10019
Castelsantangelo sul Nera MC 14 281 10300
Preci PG 16 724 11024
Cittareale RI 17 482 11506
Montegallo AP 17 523 12029
Amatrice RI 19 2657 14686
Visso MC 19 1107 15793
Poggiodomo PG 19 117 15910
Ussita MC 20 444 16354

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km SE of Foligno (57155 inhabitants)
46 Km W of Teramo (54892 inhabitants)
48 Km E of Terni (111501 inhabitants)
50 Km NW of L'Aquila (69753 inhabitants)
73 Km SE of Perugia (166134 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km W of Pescara (121014 inhabitants)
94 Km NE of Tivoli (56533 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
95 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 1.3 2019-03-31
03:43:33		 42.7668 13.1593 11 2019-03-31
03:50:10		 Sala Sismica INGV-Roma 67100081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-31 03:43:33 ± 0.05
Latitude 42.7668 ± 0.0027
Longitude 13.1593 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 67100081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 430
Semi-minor axis of confidence ellipse (meter) 207
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 81
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 114
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 20
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) 0.51351
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.4
Num. used stations 22
Type of magnitude ML
Reference to an origin 67100081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-31 03:50:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NARO.HHZ. 2019-03-31T03:44:07.89 3.0 undecidable manual S 0.04 0
IV.NARO.HHZ. 2019-03-31T03:43:53.57 3.0 positive manual P 3.05 0
IV.CESI.HHZ. 2019-03-31T03:43:45.08 0.6 undecidable manual S 322 33.5442 50 -0.17 47
IV.ATCC.EHZ. 2019-03-31T03:43:45.89 3.0 undecidable manual P 0.87 0
IV.FDMO.HHZ. 2019-03-31T03:43:44.21 0.6 undecidable manual S 349 30.4473 50 -0.22 47
IV.SNTG.HHZ. 2019-03-31T03:43:44.58 1.0 undecidable manual P 342 56.9985 50 0.6 20
IV.MNTT.EHZ. 2019-03-31T03:43:43.45 1.0 negative manual P 47 48.2184 50 0.82 19
IV.CESX.HHZ. 2019-03-31T03:43:43.07 3.0 undecidable manual S -4.15 0
IV.SMA1.EHZ. 2019-03-31T03:43:41.70 0.6 undecidable manual S 136 20.868 117 -0.1 49
IV.TERO.HHZ. 2019-03-31T03:43:41.11 0.3 undecidable manual S -0.52 1.46
IV.MTRA.EHZ. 2019-03-31T03:43:41.06 0.6 undecidable manual S 93 19.3695 118 -0.28 47
IV.LNSS.HHZ. 2019-03-31T03:43:41.75 0.1 undecidable manual S 208 20.6682 117 0.02 100
IV.MC2.EHZ. 2019-03-31T03:43:40.56 0.6 undecidable manual S 9 16.2726 123 0.16 49
IV.GUMA.HHZ. 2019-03-31T03:43:40.91 0.3 positive manual P 23 35.8419 50 0.2 70
IV.CESI.HHZ. 2019-03-31T03:43:40.33 0.6 undecidable manual P 322 33.5442 50 -0.04 49
IV.MF5.EHZ. 2019-03-31T03:43:40.77 1.0 positive manual P 45 34.6431 50 0.24 23
IV.CAMP.HHZ. 2019-03-31T03:43:40.26 0.1 undecidable manual P 141 32.745 50 0.02 97
IV.FDMO.HHZ. 2019-03-31T03:43:39.60 0.1 undecidable manual P 349 30.4473 50 -0.29 93
IV.LNSS.HHZ. 2019-03-31T03:43:38.36 0.1 undecidable manual P 208 20.6682 117 0.03 99
IV.NRCA.HNZ. 2019-03-31T03:43:38.17 0.6 undecidable manual S 334 8.2806 142 -0.17 49
IV.SMA1.EHZ. 2019-03-31T03:43:38.38 0.1 undecidable manual P 136 20.868 117 0 100
IV.MTRA.EHZ. 2019-03-31T03:43:38.02 0.6 undecidable manual P 93 19.3695 118 -0.09 49
IV.SAMA.HHZ. 2019-03-31T03:43:37.50 3.0 positive manual P -6.97 0
IV.MC2.EHZ. 2019-03-31T03:43:37.64 0.3 undecidable manual P 9 16.2726 123 0.07 75
IV.NRCA.HNZ. 2019-03-31T03:43:36.48 0.1 undecidable manual P 334 8.2806 142 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:2.0 0.0015300000000000001 0.16 AML other m 2019-03-31T03:43:38.24
IV.NRCA.HNN. ML:2.0 0.001315 0.16 AML other m 2019-03-31T03:43:38.24
IV.NRCA.HNE. ML:1.9 0.00118 0.48 AML other m 2019-03-31T03:43:38.14
IV.NRCA.HHE. ML:2.0 0.00125 0.5 AML other m 2019-03-31T03:43:38.13
IV.LNSS.HHE. ML:1.7 0.0003885 1.7 AML other m 2019-03-31T03:43:41.10
IV.LNSS.HHN. ML:1.6 0.0003105 0.16 AML other m 2019-03-31T03:43:42.14
IV.MTRA.EHN. ML:1.3 0.00016599999999999997 0.14 AML other m 2019-03-31T03:43:42.28
IV.MTRA.EHE. ML:1.5 0.00021850000000000003 0.54 AML other m 2019-03-31T03:43:42.82
IV.SMA1.EHN. ML:1.2 0.0001015 1.84 AML other m 2019-03-31T03:43:42.00
IV.SMA1.EHE. ML:1.2 0.00011325 1.58 AML other m 2019-03-31T03:43:43.14
IV.FDMO.HHE. ML:1.0 0.00005015 1.74 AML other m 2019-03-31T03:43:45.91
IV.CAMP.HHE. ML:0.8 0.0000302 0.18 AML other m 2019-03-31T03:43:45.05
IV.CESI.HHE. ML:1.1 0.000049250000000000004 0.38 AML other m 2019-03-31T03:43:45.45
IV.FDMO.HHN. ML:1.0 0.0000474 0.24 AML other m 2019-03-31T03:43:45.86
IV.CESI.HHN. ML:1.2 0.00007145 0.76 AML other m 2019-03-31T03:43:46.04
IV.CAMP.HHN. ML:0.5 0.0000151 1.2 AML other m 2019-03-31T03:43:46.35
IV.GUMA.HHE. ML:1.9 0.00028300000000000005 0.3 AML other m 2019-03-31T03:43:46.88
IV.GUMA.HHN. ML:1.6 0.0001705 0.2 AML other m 2019-03-31T03:43:46.82
IV.TERO.HHE. ML:1.3 0.000067 0.52 AML other m 2019-03-31T03:43:47.14
IV.TERO.HHN. ML:1.4 0.0000853 0.08 AML other m 2019-03-31T03:43:47.15
IV.SNTG.HHN. ML:0.8 0.00001575 1.44 AML other m 2019-03-31T03:43:53.08
IV.SNTG.HHE. ML:0.8 0.000014235000000000002 0.88 AML other m 2019-03-31T03:43:54.85
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