INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 0.5 on date 16-05-2018 and time 23:50:53 (Italy) in region 9 km W Monte Cavallo (MC)

A magnitude ML 0.5 earthquake occured in region: 9 km W Monte Cavallo (MC), on

  • 16-05-2018 21:50:53 (UTC)
  • 16-05-2018 23:50:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.97, 12.89 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
Sellano PG 9 1079 1079
Monte Cavallo MC 9 145 1224
Serravalle di Chienti MC 12 1070 2294
Valtopina PG 15 1398 3692
Foligno PG 15 57155 60847
Pieve Torina MC 15 1458 62305
Trevi PG 16 8469 70774
Preci PG 16 724 71498
Visso MC 17 1107 72605
Cerreto di Spoleto PG 17 1075 73680
Muccia MC 18 915 74595
Nocera Umbra PG 18 5839 80434
Fiordimonte MC 18 202 80636
Spello PG 18 8645 89281
Pievebovigliana MC 19 866 90147
Campello sul Clitunno PG 19 2442 92589

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km E of Foligno (57155 inhabitants)
44 Km E of Perugia (166134 inhabitants)
50 Km NE of Terni (111501 inhabitants)
75 Km W of Teramo (54892 inhabitants)
80 Km NW of L'Aquila (69753 inhabitants)
88 Km SW of Ancona (100861 inhabitants)
89 Km NE of Viterbo (67173 inhabitants)
98 Km S of Fano (60888 inhabitants)
99 Km SE of Arezzo (99543 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 0.5 2018-05-16
21:50:53
42.97 12.89 10 2018-05-16
21:56:45
Sala Sismica INGV-Roma 56932561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-05-16 21:50:53 ± 0.1
Latitude 42.97 ± 0.00
Longitude 12.89 ± 0.00
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 56932561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 361
Semi-minor axis of confidence ellipse (meter) 309
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 296
Circular confidence region, given by single value of horizontal uncertainty (meter) 360
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 178
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 8
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) 0.15738
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 4
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0
Num. used stations 2
Type of magnitude ML
Reference to an origin 56932561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-05-16 21:56:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.IMOL.HNZ. 2018-05-16T21:51:35.16 3.0 undecidable manual S 0.04 0
IV.PE3.EHZ. 2018-05-16T21:51:13.88 3.0 undecidable manual S 0.04 0
IV.COR1.EHZ. 2018-05-16T21:51:05.40 3.0 undecidable manual S 0.48 0
IV.MML1.EHZ. 2018-05-16T21:51:00.23 0.1 undecidable manual S 22 0.1547 120 -0.02 97
IV.FDMO.HHZ. 2018-05-16T21:51:00.31 0.1 undecidable manual S 65 0.1574 119 -0.03 97
IV.T1221.EHZ. 2018-05-16T21:50:58.88 0.1 undecidable manual S 197 0.1142 128 -0.07 97
IV.FDMO.HHZ. 2018-05-16T21:50:57.48 0.1 undecidable manual P 65 0.1574 119 0.07 96
IV.COR1.EHZ. 2018-05-16T21:50:57.19 3.0 negative manual P -0.24 0
IV.CESI.HHZ. 2018-05-16T21:50:57.06 0.1 undecidable manual S 15 0.036 158 0 100
IV.ASSB.HHZ. 2018-05-16T21:50:57.44 3.0 positive manual Pg -0.32 0
IV.MML1.EHZ. 2018-05-16T21:50:57.24 0.1 undecidable manual P 22 0.1547 120 -0.11 96
IV.T1221.EHZ. 2018-05-16T21:50:56.64 0.1 undecidable manual P 197 0.1142 128 0.04 98
IV.CESI.HHZ. 2018-05-16T21:50:55.60 0.1 undecidable manual P 15 0.036 158 0.09 98
IV.ATCC.EHZ. 2018-05-16T21:50:54.59 3.0 undecidable manual P -2.79 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:0.5 5.61E-5 0.3 AML other m 2018-05-16T21:50:57.54
IV.CESI.HHE. ML:0.5 6.0E-5 0.38 AML other m 2018-05-16T21:50:57.22
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