INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.1 on date 15-05-2018 and time 15:38:50 (Italy) in region 5 km E Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 5 km E Norcia (PG), on

  • 15-05-2018 13:38:50 (UTC)
  • 15-05-2018 15:38:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.79, 13.15 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
Castelsantangelo sul Nera MC 12 281 5238
Arquata del Tronto AP 12 1178 6416
Accumoli RI 13 667 7083
Preci PG 14 724 7807
Cascia PG 14 3217 11024
Montegallo AP 16 523 11547
Visso MC 17 1107 12654
Ussita MC 17 444 13098
Montemonaco AP 19 604 13702
Cittareale RI 19 482 14184
Cerreto di Spoleto PG 20 1075 15259
Poggiodomo PG 20 117 15376

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Foligno (57155 inhabitants)
47 Km W of Teramo (54892 inhabitants)
49 Km NE of Terni (111501 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
72 Km E of Perugia (166134 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
94 Km W of Pescara (121014 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
96 Km NE of Tivoli (56533 inhabitants)
96 Km NW of Chieti (51815 inhabitants)
97 Km SW of Ancona (100861 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 1.1 2018-05-15
13:38:50
42.79 13.15 10 2018-05-15
14:05:09
Sala Sismica INGV-Roma 56895531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-05-15 13:38:50 ± 0.04
Latitude 42.79 ± 0.00
Longitude 13.15 ± 0.00
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 56895531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 298
Semi-minor axis of confidence ellipse (meter) 245
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 177
Circular confidence region, given by single value of horizontal uncertainty (meter) 300
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.05126
Epicentral distance of station farthest from the epicenter (degree) 0.37142
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 56895531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-05-15 14:05:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OB.GAVE.EHZ. 2018-05-15T13:38:59.21 0.6 undecidable manual S 243 0.2149 113 0.2 47
IV.SMA1.EHZ. 2018-05-15T13:38:58.66 0.6 undecidable manual S 140 0.2086 113 -0.15 48
IV.MMO1.EHZ. 2018-05-15T13:38:57.21 0.6 undecidable manual S 50 0.1664 118 -0.14 48
IV.TERO.HHZ. 2018-05-15T13:38:57.75 0.6 negative manual P 117 0.3714 50 -0.22 45
IV.MTRA.EHZ. 2018-05-15T13:38:57.69 0.6 undecidable manual S 101 0.1817 116 -0.16 48
IV.MF5.EHZ. 2018-05-15T13:38:57.00 0.1 undecidable manual P 49 0.2977 50 0.28 91
IV.CSP1.EHZ. 2018-05-15T13:38:56.70 0.1 undecidable manual P 7 0.3031 50 -0.1 94
IV.RM33.EHZ. 2018-05-15T13:38:56.54 0.1 undecidable manual P 171 0.286 50 0.03 96
IV.CESI.HHZ. 2018-05-15T13:38:56.35 0.1 undecidable manual P 320 0.2806 50 -0.08 95
IV.MC2.EHZ. 2018-05-15T13:38:56.17 0.6 undecidable manual S 12 0.1232 126 0.26 47
IV.SMA1.EHZ. 2018-05-15T13:38:55.33 0.1 undecidable manual P 140 0.2086 113 0.22 94
IV.FDMO.HHZ. 2018-05-15T13:38:55.84 0.1 undecidable manual P 349 0.25 50 -0.06 96
OB.GAVE.EHZ. 2018-05-15T13:38:55.18 0.1 undecidable manual P 243 0.2149 113 -0.05 97
IV.T1221.EHZ. 2018-05-15T13:38:55.57 0.1 undecidable manual P 287 0.2347 50 -0.08 96
IV.MMO1.EHZ. 2018-05-15T13:38:54.23 0.1 undecidable manual P 50 0.1664 118 -0.04 98
IV.MTRA.EHZ. 2018-05-15T13:38:54.51 0.1 undecidable manual P 101 0.1817 116 -0.05 98
IV.MC2.EHZ. 2018-05-15T13:38:53.62 0.1 undecidable manual P 12 0.1232 126 0.18 96
IV.NRCA.HNZ. 2018-05-15T13:38:53.65 0.6 undecidable manual S 326 0.0513 150 -0.38 47
IV.NRCA.HNZ. 2018-05-15T13:38:52.40 0.1 undecidable manual P 326 0.0513 150 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TERO.HHN. ML:1.1 3.835E-5 0.78 AML other m 2018-05-15T13:39:04.69
IV.NRCA.HNE. ML:1.9 0.001285 0.16 AML other m 2018-05-15T13:38:53.71
IV.NRCA.HHN. ML:1.8 0.000932 0.16 AML other m 2018-05-15T13:38:53.70
IV.NRCA.HNN. ML:1.7 0.0008765 0.16 AML other m 2018-05-15T13:38:53.70
OB.GAVE.EHE. ML:1.1 8.03E-5 0.62 AML other m 2018-05-15T13:39:00.12
IV.CESI.HHE. ML:1.2 6.63E-5 0.4 AML other m 2018-05-15T13:39:01.24
IV.CESI.HHN. ML:1.2 7.475E-5 0.32 AML other m 2018-05-15T13:39:01.51
IV.MTRA.EHE. ML:1.4 0.000188326139 0.1408 AML other m 2018-05-15T13:38:58.32
IV.MTRA.HNE. ML:1.4 0.000202590985 0.1408 AML other m 2018-05-15T13:38:58.32
OB.GAVE.EHN. ML:1 7.118068E-5 1.4976 AML other m 2018-05-15T13:38:59.48
IV.SMA1.EHN. ML:0.9 5.3386915E-5 0.2624 AML other m 2018-05-15T13:38:59.98
IV.SMA1.EHE. ML:0.8 4.325968E-5 0.9984 AML other m 2018-05-15T13:38:59.57
IV.FDMO.HHE. ML:0.8 2.908126E-5 0.1344 AML other m 2018-05-15T13:39:02.28
IV.FDMO.HHN. ML:0.7 2.608976E-5 0.1408 AML other m 2018-05-15T13:39:02.12
IV.TERO.HHE. ML:1 3.33782E-5 0.1216 AML other m 2018-05-15T13:39:03.90
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