INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.6 on date 16-05-2018 and time 19:38:06 (Italy) in region 8 km W Arquata del Tronto (AP)

A magnitude ML 1.6 earthquake occured in region: 8 km W Arquata del Tronto (AP), on

  • 16-05-2018 17:38:06 (UTC)
  • 16-05-2018 19:38:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8, 13.21 at 12 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
Arquata del Tronto AP 8 1178 1178
Norcia PG 10 4957 6135
Montegallo AP 11 523 6658
Castelsantangelo sul Nera MC 11 281 6939
Accumoli RI 13 667 7606
Montemonaco AP 14 604 8210
Preci PG 16 724 8934
Ussita MC 17 444 9378
Acquasanta Terme AP 17 2916 12294
Visso MC 17 1107 13401
Cascia PG 19 3217 16618
Montefortino FM 19 1178 17796

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km W of Teramo (54892 inhabitants)
45 Km E of Foligno (57155 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
53 Km NE of Terni (111501 inhabitants)
75 Km E of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
90 Km W of Pescara (121014 inhabitants)
93 Km NW of Chieti (51815 inhabitants)
94 Km S of Ancona (100861 inhabitants)
98 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km NE 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 1.6 2018-05-16
17:38:06
42.8 13.21 12 2018-05-16
17:46:31
Sala Sismica INGV-Roma 56928541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-05-16 17:38:06 ± 0.05
Latitude 42.80 ± 0.00
Longitude 13.21 ± 0.00
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 56928541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 386
Semi-minor axis of confidence ellipse (meter) 156
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 254
Circular confidence region, given by single value of horizontal uncertainty (meter) 390
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 64
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 21
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
Epicentral distance of station farthest from the epicenter (degree) 0.30037
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 56928541
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-05-16 17:46:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CPGN.EHZ. 2018-05-16T17:38:44.69 3.0 undecidable manual S -0.34 0
IV.MOMA.HHZ. 2018-05-16T17:38:16.06 3.0 negative manual P 0.04 0
IV.ASSB.HHZ. 2018-05-16T17:38:15.94 3.0 negative manual P -0.08 0
IV.GIGS.HHZ. 2018-05-16T17:38:15.21 3.0 negative manual P -0.26 0
IV.FDMO.HHZ. 2018-05-16T17:38:15.95 0.3 undecidable manual S 339 0.2482 93 -0.24 70
IV.FEMA.HNZ. 2018-05-16T17:38:14.50 0.3 undecidable manual S 323 0.1961 95 -0.15 72
IV.SMA1.EHZ. 2018-05-16T17:38:14.63 0.3 undecidable manual S 152 0.197 95 -0.03 74
IV.ARRO.EHZ. 2018-05-16T17:38:14.76 3.0 positive manual P 0.11 0
IV.TERO.HHZ. 2018-05-16T17:38:13.37 3.0 undecidable manual P -0.3 0
IV.CSP1.EHZ. 2018-05-16T17:38:12.53 0.1 undecidable manual P 359 0.2869 92 -0.16 95
IV.MMO1.EHZ. 2018-05-16T17:38:12.38 0.3 undecidable manual S 42 0.1268 108 -0.25 72
OB.GAVE.EHZ. 2018-05-16T17:38:12.24 0.3 undecidable manual P 244 0.2581 93 0.04 73
IV.RM33.EHZ. 2018-05-16T17:38:12.84 3.0 negative manual P 0.04 0
IV.MTRA.EHZ. 2018-05-16T17:38:12.85 0.3 undecidable manual S 109 0.1448 102 -0.28 71
IV.MF5.EHZ. 2018-05-16T17:38:12.50 0.1 undecidable manual P 45 0.2581 93 0.3 92
IV.CAMP.HHZ. 2018-05-16T17:38:12.91 3.0 negative manual P -0.09 0
IV.GUMA.HHZ. 2018-05-16T17:38:12.69 0.3 undecidable manual P 19 0.2734 92 0.23 70
IV.T1221.EHZ. 2018-05-16T17:38:12.40 0.1 undecidable manual P 282 0.2725 92 -0.04 97
IV.MC2.EHZ. 2018-05-16T17:38:12.30 0.3 undecidable manual S 352 0.1079 116 0.21 73
IV.CESI.HHZ. 2018-05-16T17:38:12.84 0.1 positive manual P 312 0.3004 92 -0.08 96
IV.SMA1.EHZ. 2018-05-16T17:38:11.25 0.3 undecidable manual P 152 0.197 95 0.1 73
IV.FDMO.HHZ. 2018-05-16T17:38:11.99 0.3 undecidable manual P 339 0.2482 93 -0.05 73
IV.LNSS.HHZ. 2018-05-16T17:38:11.91 0.3 undecidable manual P 212 0.2374 93 0.06 73
IV.NRCA.HNZ. 2018-05-16T17:38:11.36 0.3 undecidable manual S 292 0.0764 132 0.04 76
IV.FEMA.HNZ. 2018-05-16T17:38:11.23 0.3 undecidable manual P 323 0.1961 95 0.09 73
IV.MTRA.EHZ. 2018-05-16T17:38:10.29 0.3 undecidable manual P 109 0.1448 102 0.02 75
IV.NRCA.HNZ. 2018-05-16T17:38:09.35 0.1 undecidable manual P 292 0.0764 132 0.12 100
IV.MC2.EHZ. 2018-05-16T17:38:09.79 0.1 negative manual P 352 0.1079 116 0.12 99
IV.MMO1.EHZ. 2018-05-16T17:38:09.93 0.1 undecidable manual P 42 0.1268 108 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.8 0.00868 0.16 AML other m 2018-05-16T17:38:11.45
IV.NRCA.HHE. ML:2.9 0.00928 0.16 AML other m 2018-05-16T17:38:11.45
IV.RM33.HNE. ML:2.4 0.00101835 0.44 AML other m 2018-05-16T17:38:11.42
IV.NRCA.HNN. ML:2.7 0.006925 1.02 AML other m 2018-05-16T17:38:12.51
IV.NRCA.HHN. ML:2.8 0.007495 0.8 AML other m 2018-05-16T17:38:12.51
IV.RM33.HNN. ML:2.2 0.00076 0.48 AML other m 2018-05-16T17:38:12.42
IV.MTRA.HNE. ML:2.1 0.00105 1.56 AML other m 2018-05-16T17:38:13.19
IV.MTRA.EHE. ML:2.1 0.0010885 1.58 AML other m 2018-05-16T17:38:13.19
IV.MTRA.HNN. ML:1.9 0.0006855 0.4 AML other m 2018-05-16T17:38:13.46
IV.MTRA.EHN. ML:1.8 0.000627 0.38 AML other m 2018-05-16T17:38:13.46
IV.SMA1.EHN. ML:1.4 0.0001555 1.08 AML other m 2018-05-16T17:38:14.15
IV.SMA1.EHE. ML:1.4 0.0001485 1.44 AML other m 2018-05-16T17:38:15.12
IV.FDMO.HHN. ML:1.4 0.000136 0.4 AML other m 2018-05-16T17:38:16.23
IV.FDMO.HHE. ML:1.2 8.79E-5 0.34 AML other m 2018-05-16T17:38:16.54
OB.GAVE.EHN. ML:1.6 0.000174 0.36 AML other m 2018-05-16T17:38:17.31
IV.LNSS.HHE. ML:1.7 0.0002785 0.42 AML other m 2018-05-16T17:38:17.61
IV.LNSS.HHN. ML:1.7 0.0002895 0.94 AML other m 2018-05-16T17:38:17.18
IV.CSP1.EHE. ML:1.1 6.245E-5 0.56 AML other m 2018-05-16T17:38:17.40
IV.GUMA.HHE. ML:2.2 0.000772 0.26 AML other m 2018-05-16T17:38:17.82
IV.MF5.EHE. ML:1.7 0.0002442 1.36 AML other m 2018-05-16T17:38:17.74
IV.GUMA.HHN. ML:2.2 0.0007835 0.38 AML other m 2018-05-16T17:38:17.88
IV.CESI.HHN. ML:1.8 0.0002485 0.56 AML other m 2018-05-16T17:38:18.33
IV.CESI.HHE. ML:1.5 0.0001295 0.72 AML other m 2018-05-16T17:38:18.37
IV.CSP1.EHN. ML:0.8 2.815E-5 0.38 AML other m 2018-05-16T17:38:18.56
IV.MF5.EHN. ML:1.5 0.000167 1.36 AML other m 2018-05-16T17:38:18.98
IV.RM33.EHN. ML:1.3 9.035E-5 1.24 AML other m 2018-05-16T17:38:19.13
IV.TERO.HHN. ML:1.7 0.0001975 1.48 AML other m 2018-05-16T17:38:19.22
OB.GAVE.HNE. ML:1.8 0.0003015 0.7 AML other m 2018-05-16T17:38:19.85
OB.GAVE.EHE. ML:1.7 0.0002625 0.18 AML other m 2018-05-16T17:38:19.85
IV.TERO.HHE. ML:1.8 0.000233 1.88 AML other m 2018-05-16T17:38:19.03
IV.RM33.EHE. ML:1.4 9.435E-5 0.92 AML other m 2018-05-16T17:38:19.52
OB.GAVE.HNN. ML:1.8 0.000278 0.88 AML other m 2018-05-16T17:38:22.64
IV.ARRO.EHE. ML:1.3 6.635E-5 0.16 AML other m 2018-05-16T17:38:23.26
IV.ASSB.HHE. ML:1.5 8.695E-5 0.18 AML other m 2018-05-16T17:38:23.49
IV.ASSB.HHN. ML:1.4 7.225E-5 0.62 AML other m 2018-05-16T17:38:23.52
IV.ARRO.EHN. ML:1.3 6.27E-5 0.7 AML other m 2018-05-16T17:38:23.90
IV.MOMA.HHE. ML:1.7 0.0001295 0.22 AML other m 2018-05-16T17:38:24.60
IV.MOMA.HHN. ML:1.4 5.565E-5 0.18 AML other m 2018-05-16T17:38:25.75
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