INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 0.4 on date 17-05-2018 and time 05:39:24 (Italy) in region 5 km N Norcia (PG)

A magnitude ML 0.4 earthquake occured in region: 5 km N Norcia (PG), on

  • 17-05-2018 03:39:24 (UTC)
  • 17-05-2018 05:39:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.83, 13.09 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.

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 7 724 5681
Castelsantangelo sul Nera MC 9 281 5962
Visso MC 11 1107 7069
Ussita MC 13 444 7513
Cascia PG 14 3217 10730
Cerreto di Spoleto PG 14 1075 11805
Sellano PG 15 1079 12884
Arquata del Tronto AP 18 1178 14062
Poggiodomo PG 19 117 14179
Monte Cavallo MC 19 145 14324
Montegallo AP 20 523 14847
Accumoli RI 20 667 15514
Vallo di Nera PG 20 364 15878

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
54 Km W of Teramo (54892 inhabitants)
59 Km NW of L'Aquila (69753 inhabitants)
65 Km E of Perugia (166134 inhabitants)
93 Km NE of Viterbo (67173 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
100 Km N of Tivoli (56533 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 0.4 2018-05-17
03:39:24
42.83 13.09 10 2018-05-17
03:45:03
Sala Sismica INGV-Roma 56938941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-05-17 03:39:24 ± 0.1
Latitude 42.83 ± 0.00
Longitude 13.09 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 56938941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 466
Semi-minor axis of confidence ellipse (meter) 382
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 128
Circular confidence region, given by single value of horizontal uncertainty (meter) 470
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.01619
Epicentral distance of station farthest from the epicenter (degree) 0.31027
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 56938941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-05-17 03:45:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESI.HHZ. 2018-05-17T03:39:33.26 0.1 undecidable manual S 321 0.2194 113 -0.18 94
IV.LNSS.HHN. 2018-05-17T03:39:33.42 0.3 undecidable manual S 189 0.2338 50 -0.48 66
IV.T1221.EHZ. 2018-05-17T03:39:32.04 0.1 undecidable manual S 279 0.1817 117 -0.08 97
IV.FDMO.HHZ. 2018-05-17T03:39:32.60 0.3 undecidable manual S 359 0.2023 114 -0.26 70
OB.GAVE.HNE. 2018-05-17T03:39:32.75 0.1 undecidable manual S 226 0.2023 114 -0.11 96
IV.MF5.EHZ. 2018-05-17T03:39:31.51 1.0 positive manual P 60 0.3103 50 0.37 22
IV.MMO1.EHZ. 2018-05-17T03:39:31.87 0.1 undecidable manual S 69 0.1844 116 -0.34 92
IV.LNSS.HHN. 2018-05-17T03:39:30.13 0.3 undecidable manual P 189 0.2338 50 0.29 69
IV.MC2.EHZ. 2018-05-17T03:39:29.99 0.1 undecidable manual S 42 0.1052 131 0.33 93
IV.FDMO.HHZ. 2018-05-17T03:39:29.40 0.1 undecidable manual P 359 0.2023 114 0.16 95
OB.GAVE.HNE. 2018-05-17T03:39:29.88 0.3 undecidable manual P 226 0.2023 114 0.64 63
IV.CESI.HHZ. 2018-05-17T03:39:29.54 0.6 negative manual P 321 0.2194 113 -0.04 49
IV.MMO1.EHZ. 2018-05-17T03:39:28.71 0.1 undecidable manual P 69 0.1844 116 -0.16 95
IV.T1221.EHZ. 2018-05-17T03:39:28.87 0.1 undecidable manual P 279 0.1817 117 0.05 97
IV.NRCA.HNZ. 2018-05-17T03:39:27.67 0.1 undecidable manual S 91 0.0162 170 -0.2 98
IV.MC2.EHZ. 2018-05-17T03:39:27.67 0.1 undecidable manual P 42 0.1052 131 0.28 94
IV.NRCA.HNZ. 2018-05-17T03:39:26.44 0.1 undecidable manual P 91 0.0162 170 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.7 0.0008480234 0.0608 AML other m 2018-05-17T03:39:27.70
IV.NRCA.HNN. ML:1.6 0.00079255355 0.0704 AML other m 2018-05-17T03:39:27.74
IV.NRCA.HNE. ML:1.5 0.0005664087 0.08 AML other m 2018-05-17T03:39:27.71
IV.NRCA.HHE. ML:1.6 0.00064921895 0.0816 AML other m 2018-05-17T03:39:27.70
IV.T1221.EHE. ML:0.4 1.8587245E-5 0.08 AML other m 2018-05-17T03:39:32.18
IV.FDMO.HHE. ML:0.2 9.77341541E-6 0.1392 AML other m 2018-05-17T03:39:33.33
IV.FDMO.HHN. ML:0.2 7.9395825E-6 0.2 AML other m 2018-05-17T03:39:33.98
IV.CESI.HHN. ML:0.6 2.3456395E-5 0.16 AML other m 2018-05-17T03:39:33.85
IV.CESI.HHE. ML:0.6 2.6148405E-5 0.12 AML other m 2018-05-17T03:39:33.32
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download