INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.1 on date 16-05-2018 and time 14:11:41 (Italy) in region 4 km NE Arquata del Tronto (AP)

A magnitude ML 1.1 earthquake occured in region: 4 km NE Arquata del Tronto (AP), on

  • 16-05-2018 12:11:41 (UTC)
  • 16-05-2018 14:11:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8, 13.32 at 14 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 4 1178 1178
Montegallo AP 5 523 1701
Acquasanta Terme AP 8 2916 4617
Montemonaco AP 11 604 5221
Accumoli RI 13 667 5888
Roccafluvione AP 15 2010 7898
Montefortino FM 16 1178 9076
Palmiano AP 16 196 9272
Valle Castellana TE 17 977 10249
Castelsantangelo sul Nera MC 17 281 10530
Venarotta AP 17 2066 12596
Norcia PG 18 4957 17553
Comunanza AP 19 3166 20719
Amatrice RI 19 2657 23376
Amandola FM 20 3629 27005

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km W of Teramo (54892 inhabitants)
51 Km N of L'Aquila (69753 inhabitants)
53 Km E of Foligno (57155 inhabitants)
61 Km E of Terni (111501 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
83 Km W of Pescara (121014 inhabitants)
83 Km E of Perugia (166134 inhabitants)
86 Km NW of Chieti (51815 inhabitants)
92 Km S 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 2018-05-16
12:11:41
42.8 13.32 15 2018-05-16
12:17:40
Sala Sismica INGV-Roma 56919271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-05-16 12:11:41 ± 0.1
Latitude 42.80 ± 0.00
Longitude 13.32 ± 0.00
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 56919271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 464
Semi-minor axis of confidence ellipse (meter) 173
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 222
Circular confidence region, given by single value of horizontal uncertainty (meter) 460
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 152
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.29947
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0
Num. used stations 2
Type of magnitude ML
Reference to an origin 56919271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-05-16 12:17:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2018-05-16T12:11:53.25 0.3 undecidable manual S 344 0.2995 99 0.01 73
IV.TERO.HHZ. 2018-05-16T12:11:52.41 0.6 undecidable manual S 130 0.277 101 -0.17 47
IV.NRCA.HHZ. 2018-05-16T12:11:48.92 0.6 undecidable manual S 282 0.152 118 -0.12 49
IV.CSP1.EHZ. 2018-05-16T12:11:48.09 1.0 positive manual P 344 0.2995 99 -0.32 23
IV.TERO.HHZ. 2018-05-16T12:11:48.11 0.6 undecidable manual P 130 0.277 101 0.08 49
IV.MC2.EHZ. 2018-05-16T12:11:48.78 0.6 undecidable manual S 319 0.143 120 -0.03 50
IV.MTRA.EHZ. 2018-05-16T12:11:47.22 0.3 undecidable manual S 129 0.0746 143 -0.06 75
IV.NRCA.HHZ. 2018-05-16T12:11:46.01 0.1 negative manual P 282 0.152 118 0.03 100
IV.OFFI.HHZ. 2018-05-16T12:11:46.96 3.0 undecidable manual P -0.76 0
IV.MTRA.EHZ. 2018-05-16T12:11:45.20 0.3 positive manual P 129 0.0746 143 0.22 73
IV.MC2.EHZ. 2018-05-16T12:11:45.97 0.6 positive manual P 319 0.143 120 0.11 49
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.1 8.91E-5 0.1 AML other m 2018-05-16T12:11:49.07
IV.NRCA.HHN. ML:1 7.83E-5 0.12 AML other m 2018-05-16T12:11:49.49
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