INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 0.9 on date 16-05-2018 and time 20:39:20 (Italy) in region 5 km N Norcia (PG)

A magnitude ML 0.9 earthquake occured in region: 5 km N Norcia (PG), on

  • 16-05-2018 18:39:20 (UTC)
  • 16-05-2018 20:39:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.84, 13.09 at 11 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 6 724 5681
Castelsantangelo sul Nera MC 8 281 5962
Visso MC 10 1107 7069
Ussita MC 12 444 7513
Sellano PG 14 1079 8592
Cerreto di Spoleto PG 15 1075 9667
Cascia PG 15 3217 12884
Arquata del Tronto AP 18 1178 14062
Monte Cavallo MC 19 145 14207
Poggiodomo PG 19 117 14324
Montegallo AP 20 523 14847

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
54 Km W of Teramo (54892 inhabitants)
60 Km NW of L'Aquila (69753 inhabitants)
64 Km E of Perugia (166134 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
94 Km NE of Viterbo (67173 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
98 Km NE of Guidonia Montecelio (88673 inhabitants)
101 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 0.9 2018-05-16
18:39:20
42.84 13.09 11 2018-05-16
18:45:00
Sala Sismica INGV-Roma 56930741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-05-16 18:39:20 ± 0.05
Latitude 42.84 ± 0.00
Longitude 13.09 ± 0.00
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 56930741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 321
Semi-minor axis of confidence ellipse (meter) 310
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 113
Circular confidence region, given by single value of horizontal uncertainty (meter) 320
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 52
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.43437
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 14
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 15
Type of magnitude ML
Reference to an origin 56930741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-05-16 18:45:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2018-05-16T18:39:34.87 3.0 undecidable manual S 0.32 0
IV.TERO.HHZ. 2018-05-16T18:39:29.03 0.3 undecidable manual P 120 0.4344 50 0.07 69
IV.SNTG.HHZ. 2018-05-16T18:39:28.98 3.0 undecidable manual P -0.14 0
IV.T1219.HNZ. 2018-05-16T18:39:28.97 0.3 undecidable manual S 343 0.223 50 -0.21 70
IV.T1221.EHZ. 2018-05-16T18:39:28.10 0.3 undecidable manual S 276 0.1808 50 0.17 71
OB.GAVE.EHZ. 2018-05-16T18:39:28.62 0.3 undecidable manual S 224 0.2086 50 -0.14 71
IV.FDMO.HHZ. 2018-05-16T18:39:28.31 0.3 undecidable manual S 359 0.1943 50 -0.02 73
IV.CESI.HHZ. 2018-05-16T18:39:28.88 0.3 undecidable manual S 320 0.2131 50 0 73
IV.MMO1.EHZ. 2018-05-16T18:39:27.66 0.3 undecidable manual S 71 0.1808 50 -0.28 69
IV.RM33.EHZ. 2018-05-16T18:39:27.28 3.0 positive manual P -0.16 0
IV.MF5.EHZ. 2018-05-16T18:39:27.17 0.3 undecidable manual P 61 0.3058 50 0.42 66
IV.CSP1.EHZ. 2018-05-16T18:39:26.07 0.3 undecidable manual P 18 0.2626 50 0.05 71
OB.GAVE.EHZ. 2018-05-16T18:39:25.12 0.3 undecidable manual P 224 0.2086 50 0.02 73
IV.CESI.HHZ. 2018-05-16T18:39:25.17 0.1 positive manual P 320 0.2131 50 0.01 97
IV.LNSS.HHZ. 2018-05-16T18:39:25.56 0.3 undecidable manual P 189 0.2419 50 -0.1 71
IV.T1219.HNZ. 2018-05-16T18:39:25.23 0.3 undecidable manual P 343 0.223 50 -0.11 71
IV.T1299.HNZ. 2018-05-16T18:39:25.95 0.3 undecidable manual P 146 0.25 50 0.15 70
IV.FDMO.HHZ. 2018-05-16T18:39:24.80 0.3 undecidable manual P 359 0.1943 50 -0.05 72
IV.MMO1.EHZ. 2018-05-16T18:39:24.57 0.3 positive manual P 71 0.1808 50 -0.05 73
IV.T1221.EHZ. 2018-05-16T18:39:24.68 0.3 undecidable manual P 276 0.1808 50 0.07 72
IV.FEMA.HNZ. 2018-05-16T18:39:23.71 0.3 undecidable manual P 345 0.1241 129 0.1 73
IV.NRCA.HNZ. 2018-05-16T18:39:23.60 0.3 undecidable manual S 118 0.018 170 -0.35 70
IV.MC2.EHZ. 2018-05-16T18:39:23.41 0.1 undecidable manual P 46 0.0989 135 0.21 95
IV.NRCA.HNZ. 2018-05-16T18:39:22.35 0.1 negative manual P 118 0.018 170 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:1.2 7.9E-5 1.32 AML other m 2018-05-16T18:39:30.17
IV.NRCA.HNN. ML:1.8 0.00118 0.12 AML other m 2018-05-16T18:39:23.73
IV.NRCA.HHE. ML:1.5 0.0004775 0.08 AML other m 2018-05-16T18:39:23.84
IV.NRCA.HNE. ML:1.4 0.0004455 0.42 AML other m 2018-05-16T18:39:23.73
IV.FDMO.HHE. ML:0.8 4.39E-5 1.48 AML other m 2018-05-16T18:39:29.12
OB.GAVE.EHN. ML:1.3 0.00012135 1.46 AML other m 2018-05-16T18:39:29.90
OB.GAVE.EHE. ML:1.3 0.00012645 1.44 AML other m 2018-05-16T18:39:29.93
IV.CESI.HHN. ML:1.3 0.0001205 0.24 AML other m 2018-05-16T18:39:29.25
IV.CESI.HHE. ML:1.1 7.845E-5 0.44 AML other m 2018-05-16T18:39:29.26
IV.FDMO.HHN. ML:0.8 3.925E-5 1.22 AML other m 2018-05-16T18:39:29.74
IV.LNSS.HHE. ML:1.3 9.965E-5 0.14 AML other m 2018-05-16T18:39:30.27
IV.CSP1.EHE. ML:0.6 2.084654675E-5 0.1024 AML other m 2018-05-16T18:39:31.07
IV.RM33.EHE. ML:0.7 2.2326675E-5 0.1536 AML other m 2018-05-16T18:39:34.06
IV.RM33.EHN. ML:0.8 2.3730115E-5 0.1408 AML other m 2018-05-16T18:39:33.17
IV.SNTG.HHE. ML:0.6 1.10940935E-5 0.1152 AML other m 2018-05-16T18:39:37.90
IV.SNTG.HHN. ML:0.7 1.5224657E-5 0.1024 AML other m 2018-05-16T18:39:37.20
IV.TERO.HHE. ML:0.7 1.354369E-5 0.1536 AML other m 2018-05-16T18:39:37.42
IV.TERO.HHN. ML:0.6 1.23943665E-5 0.0768 AML other m 2018-05-16T18:39:36.37
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