INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.2 on date 16-05-2018 and time 07:15:58 (Italy) in region 3 km NW Alvito (FR)

A magnitude ML 1.2 earthquake occured in region: 3 km NW Alvito (FR), on

  • 16-05-2018 05:15:58 (UTC)
  • 16-05-2018 07:15:58 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.72, 13.73 at 7 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
Alvito FR 3 2713 2713
Posta Fibreno FR 4 1139 3852
Campoli Appennino FR 5 1725 5577
Vicalvi FR 5 783 6360
Fontechiari FR 7 1303 7663
Pescosolido FR 7 1555 9218
San Donato Val di Comino FR 7 2107 11325
Broccostella FR 8 2741 14066
Gallinaro FR 9 1269 15335
Casalvieri FR 10 2698 18033
Sora FR 10 26144 44177
Casalattico FR 11 574 44751
Opi AQ 11 420 45171
Settefrati FR 11 728 45899
Pescasseroli AQ 12 2203 48102
Atina FR 12 4316 52418
Arpino FR 12 7262 59680
Isola del Liri FR 13 11715 71395
Picinisco FR 14 1218 72613
Villa Latina FR 15 1241 73854
Santopadre FR 15 1357 75211
Castelliri FR 15 3454 78665
Balsorano AQ 17 3569 82234
Belmonte Castello FR 17 739 82973
Villetta Barrea AQ 18 653 83626
Civitella Alfedena AQ 19 296 83922
Terelle FR 19 422 84344
Rocca d'Arce FR 19 959 85303
Colle San Magno FR 19 699 86002
Fontana Liri FR 19 2953 88955
Villavallelonga AQ 19 919 89874
Roccasecca FR 19 7365 97239
Arce FR 19 5756 102995
Monte San Giovanni Campano FR 20 12929 115924

Municipalities with at least 50000 inhabitants

An earthquake occurred to
74 Km E of Latina (125985 inhabitants)
76 Km SE of L'Aquila (69753 inhabitants)
79 Km E of Velletri (53303 inhabitants)
79 Km SW of Chieti (51815 inhabitants)
82 Km E of Tivoli (56533 inhabitants)
87 Km NW of Caserta (76326 inhabitants)
89 Km E of Guidonia Montecelio (88673 inhabitants)
91 Km E of Aprilia (73446 inhabitants)
92 Km NW of Aversa (53047 inhabitants)
92 Km SW of Pescara (121014 inhabitants)
95 Km SW of Montesilvano (53738 inhabitants)
96 Km NW of Giugliano in Campania (122974 inhabitants)
96 Km E of Anzio (54211 inhabitants)
99 Km NW of Marano di Napoli (59874 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 1.2 2018-05-16
05:15:58
41.72 13.73 7 2018-05-16
05:20:23
Sala Sismica INGV-Roma 56911781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-05-16 05:15:58 ± 0.15
Latitude 41.72 ± 0.00
Longitude 13.73 ± 0.01
Depth (km) 7 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 56911781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 416
Semi-minor axis of confidence ellipse (meter) 265
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 269
Circular confidence region, given by single value of horizontal uncertainty (meter) 420
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.09
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.32196
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 4
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0
Num. used stations 4
Type of magnitude ML
Reference to an origin 56911781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-05-16 05:20:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VIVA.HHZ. 2018-05-16T05:16:14.16 3.0 negative manual P 0.03 0
IV.INTR.HHZ. 2018-05-16T05:16:11.32 0.1 undecidable manual S 24 0.322 102 -0.03 96
IV.INTR.HHZ. 2018-05-16T05:16:05.88 0.1 positive manual P 24 0.322 102 -0.11 94
IV.VVLD.HHZ. 2018-05-16T05:16:05.82 0.1 undecidable manual S 333 0.1718 111 0.05 98
IV.CERA.HHZ. 2018-05-16T05:16:04.44 0.1 undecidable manual P 119 0.2473 105 0.07 96
IV.LRP.EHZ. 2018-05-16T05:16:04.16 0.1 undecidable manual S 237 0.1268 118 -0.05 99
IV.VVLD.HHZ. 2018-05-16T05:16:02.84 0.1 positive manual P 333 0.1718 111 0.06 98
IV.LRP.EHZ. 2018-05-16T05:16:01.88 0.1 undecidable manual P 237 0.1268 118 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LRP.EHE. ML:1.2 0.0001852667 0.24 AML other m 2018-05-16T05:16:05.05
IV.LRP.EHN. ML:1.2 0.000157138885 0.2176 AML other m 2018-05-16T05:16:06.29
IV.VVLD.HHN. ML:1.1 0.00011091358 0.3584 AML other m 2018-05-16T05:16:09.33
IV.VVLD.HHE. ML:1.2 0.00011803897 0.2784 AML other m 2018-05-16T05:16:06.08
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