ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 1.2 on date 18-02-2019 and time 23:04:04 (UTC) in region 5 km W Visso (MC)

A magnitude ML 1.2 earthquake occured in region: 5 km W Visso (MC), on

  • 18-02-2019 23:04:04 (UTC)
  • 19-02-2019 00:04:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.93, 13.03 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
Visso MC 5 1107 1107
Preci PG 6 724 1831
Monte Cavallo MC 7 145 1976
Ussita MC 9 444 2420
Sellano PG 9 1079 3499
Castelsantangelo sul Nera MC 11 281 3780
Pieve Torina MC 13 1458 5238
Fiordimonte MC 13 202 5440
Cerreto di Spoleto PG 15 1075 6515
Pievebovigliana MC 16 866 7381
Fiastra MC 16 559 7940
Norcia PG 16 4957 12897
Acquacanina MC 16 121 13018
Muccia MC 17 915 13933
Serravalle di Chienti MC 17 1070 15003
Bolognola MC 18 142 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Foligno (57155 inhabitants)
51 Km NE of Terni (111501 inhabitants)
56 Km E of Perugia (166134 inhabitants)
63 Km W of Teramo (54892 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
86 Km SW of Ancona (100861 inhabitants)
95 Km NE of Viterbo (67173 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 2019-02-18
23:04:04
42.93 13.03 11 2019-02-18
23:40:05
Sala Sismica INGV-Roma 65672221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-02-18 23:04:04 ± 0.04
Latitude 42.93 ± 0.00
Longitude 13.03 ± 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 65672221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 364
Semi-minor axis of confidence ellipse (meter) 224
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 36
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) 91
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.38041
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 65672221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-02-18 23:40:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ATCC.EHZ. 2019-02-18T23:04:18.61 0.6 undecidable manual S 312 0.3804 50 0.55 42
IV.ASSB.HHZ. 2019-02-18T23:04:15.25 0.6 undecidable manual S 293 0.2923 50 -0.19 47
IV.GAVE.EHZ. 2019-02-18T23:04:14.31 0.6 undecidable manual S 202 0.2572 50 -0.09 48
IV.MMO1.EHZ. 2019-02-18T23:04:13.29 0.6 undecidable manual S 98 0.2212 50 -0.04 49
IV.CSP1.EHZ. 2019-02-18T23:04:12.77 0.6 undecidable manual S 39 0.2068 50 -0.13 48
IV.ATCC.EHZ. 2019-02-18T23:04:12.26 0.1 undecidable manual P 312 0.3804 50 0.01 95
IV.MF5.EHZ. 2019-02-18T23:04:10.37 3.0 undecidable manual P -0.68 0
IV.CESI.HHZ. 2019-02-18T23:04:10.08 0.6 undecidable manual S 310 0.1169 130 -0.13 49
IV.MC2.EHZ. 2019-02-18T23:04:10.48 0.6 undecidable manual S 99 0.1196 130 0.19 48
IV.ASSB.HHZ. 2019-02-18T23:04:10.59 0.1 undecidable manual P 293 0.2923 50 -0.14 95
IV.GAVE.EHZ. 2019-02-18T23:04:10.21 0.6 undecidable manual P 202 0.2572 50 0.08 48
IV.NRCA.HHZ. 2019-02-18T23:04:10.04 0.6 undecidable manual S 147 0.116 131 -0.13 49
IV.FDMO.HHZ. 2019-02-18T23:04:09.89 0.6 undecidable manual S 22 0.1142 131 -0.25 48
IV.CSP1.EHZ. 2019-02-18T23:04:09.35 1.0 negative manual P 39 0.2068 50 0.08 24
IV.MMO1.EHZ. 2019-02-18T23:04:09.51 0.1 undecidable manual P 98 0.2212 50 -0.01 99
IV.MC2.EHZ. 2019-02-18T23:04:08.05 1.0 undecidable manual P 99 0.1196 130 0.29 24
IV.NRCA.HHZ. 2019-02-18T23:04:07.73 0.1 undecidable manual P 147 0.116 131 0.03 100
IV.FDMO.HHZ. 2019-02-18T23:04:07.75 0.6 negative manual P 22 0.1142 131 0.08 50
IV.CESI.HHZ. 2019-02-18T23:04:07.81 0.1 negative manual P 310 0.1169 130 0.1 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1 0.00010875 0.26 AML other m 2019-02-18T23:04:10.15
IV.CESI.HHE. ML:1.2 0.000171 0.16 AML other m 2019-02-18T23:04:10.17
IV.NRCA.HHN. ML:1.3 0.0002145 0.64 AML other m 2019-02-18T23:04:10.52
IV.CESI.HHN. ML:1.2 0.000177 0.26 AML other m 2019-02-18T23:04:10.18
IV.FDMO.HHE. ML:1.2 0.0001615 0.16 AML other m 2019-02-18T23:04:10.43
IV.NRCA.HHE. ML:1.2 0.000181 0.6 AML other m 2019-02-18T23:04:10.41
IV.GAVE.EHE. ML:1.2 7.28E-5 0.42 AML other m 2019-02-18T23:04:14.64
IV.GAVE.EHN. ML:1 5.28E-5 0.14 AML other m 2019-02-18T23:04:15.25
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