Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 09-04-2020 and time 17:12:20 (UTC) in region 4 km NW Visso (MC)

A magnitude ML 0.4 earthquake occured in region: 4 km NW Visso (MC), on

  • 09-04-2020 17:12:20 (UTC)
  • 09-04-2020 19:12:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9530, 13.0460 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 4 1107 1107
Monte Cavallo MC 6 145 1252
Ussita MC 8 444 1696
Preci PG 8 724 2420
Fiordimonte MC 10 202 2622
Pieve Torina MC 10 1458 4080
Castelsantangelo sul Nera MC 11 281 4361
Sellano PG 12 1079 5440
Pievebovigliana MC 13 866 6306
Fiastra MC 13 559 6865
Acquacanina MC 14 121 6986
Muccia MC 15 915 7901
Serravalle di Chienti MC 15 1070 8971
Bolognola MC 16 142 9113
Cerreto di Spoleto PG 18 1075 10188
Norcia PG 18 4957 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
54 Km NE of Terni (111501 inhabitants)
56 Km E of Perugia (166134 inhabitants)
63 Km NW of Teramo (54892 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
97 Km NE of Viterbo (67173 inhabitants)
99 Km S of Fano (60888 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 0.4 2020-04-09
17:12:20		 42.9528 13.0455 10 2020-04-09
17:22:38		 Sala Sismica INGV-Roma 78049501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-09 17:12:20 ± 0.17
Latitude 42.9528 ± 0.0027
Longitude 13.0455 ± 0.0049
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 78049501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 400
Semi-minor axis of confidence ellipse (meter) 72
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 64
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 140
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 11
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.18166
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 78049501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-09 17:22:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
AC.VLO.HHZ. 2020-04-09T17:13:55.03 3.0 undecidable manual Pg 18.879999 0
IV.PZUN.HHZ. 2020-04-09T17:13:51.21 3.0 undecidable manual Sn -5.59 0
IV.ESML.HHZ. 2020-04-09T17:13:38.33 3.0 negative manual Pn -3.41 0
IV.LRP.EHZ. 2020-04-09T17:13:18.42 3.0 undecidable manual Sn 1.58 0
IV.TERO.HHZ. 2020-04-09T17:12:55.73 3.0 undecidable manual Sn 1.1 0
IV.MNTV.HNZ. 2020-04-09T17:12:54.06 3.0 undecidable manual Sg -6.65 0
IV.MILN.HHZ. 2020-04-09T17:12:54.02 3.0 undecidable manual Pn 3.25 0
IV.APRC.HHZ. 2020-04-09T17:12:51.60 3.0 undecidable manual Pg -1.96 0
IV.CRMI.HHZ. 2020-04-09T17:12:28.20 3.0 undecidable manual P -0.2 0
IV.MML1.HNZ. 2020-04-09T17:12:28.09 0.3 undecidable manual S 341 18.7701 118 -0.22 71
IV.CSP1.EHZ. 2020-04-09T17:12:28.70 0.3 undecidable manual S 40 20.1687 116 -0.02 74
IV.CESI.HHZ. 2020-04-09T17:12:26.61 0.1 undecidable manual S 297 12.7761 128 0.05 100
IV.NRCA.HHE. 2020-04-09T17:12:26.79 0.3 undecidable manual S 157 14.3745 125 -0.21 72
IV.CSP1.EHZ. 2020-04-09T17:12:25.42 0.1 undecidable manual P 40 20.1687 116 0 99
IV.FDMO.HHZ. 2020-04-09T17:12:25.86 0.1 undecidable manual S 20 9.879 135 0.05 100
IV.MML1.HNZ. 2020-04-09T17:12:24.96 0.3 undecidable manual P 341 18.7701 118 -0.23 71
IV.CESI.HHZ. 2020-04-09T17:12:24.32 0.1 undecidable manual P 297 12.7761 128 0.14 98
IV.NRCA.HHE. 2020-04-09T17:12:24.47 0.3 undecidable manual P 157 14.3745 125 0.04 75
IV.MC2.EHZ. 2020-04-09T17:12:24.25 0.3 undecidable manual P 111 12.5763 129 0.11 74
IV.FDMO.HHZ. 2020-04-09T17:12:23.90 0.1 undecidable manual P 20 9.879 135 0.16 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:0.3 0.00002435 0.62 AML other m 2020-04-09T17:12:26.08
IV.FDMO.HHE. ML:0.4 0.00003245 0.22 AML other m 2020-04-09T17:12:26.31
IV.CESI.HHN. ML:0.5 0.00003535 0.4 AML other m 2020-04-09T17:12:26.94
IV.CESI.HHE. ML:0.5 0.0000371 0.34 AML other m 2020-04-09T17:12:26.94
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download