Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 18-08-2019 and time 21:00:23 (Italy) in region 4 km W Visso (MC)

A magnitude ML 1.1 earthquake occured in region: 4 km W Visso (MC), on

  • 18-08-2019 19:00:23 (UTC)
  • 18-08-2019 21:00:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9380, 13.0430 at 9 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.

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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
Preci PG 7 724 1831
Monte Cavallo MC 7 145 1976
Ussita MC 8 444 2420
Castelsantangelo sul Nera MC 10 281 2701
Sellano PG 11 1079 3780
Fiordimonte MC 12 202 3982
Pieve Torina MC 12 1458 5440
Pievebovigliana MC 14 866 6306
Fiastra MC 14 559 6865
Acquacanina MC 15 121 6986
Muccia MC 16 915 7901
Bolognola MC 16 142 8043
Norcia PG 17 4957 13000
Cerreto di Spoleto PG 17 1075 14075
Serravalle di Chienti MC 17 1070 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
53 Km NE of Terni (111501 inhabitants)
56 Km E of Perugia (166134 inhabitants)
62 Km NW of Teramo (54892 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
96 Km NE of Viterbo (67173 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 1.1 2019-08-18
19:00:23		 42.9383 13.043 9 2019-08-18
19:27:27		 Sala Sismica INGV-Roma 71610521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-18 19:00:23 ± 0.08
Latitude 42.9383 ± 0.0036
Longitude 13.0430 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71610521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 526
Semi-minor axis of confidence ellipse (meter) 76
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 228
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.56387
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 71610521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-18 19:27:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
AC.VLO.HHZ. 2019-08-18T19:01:41.45 3.0 undecidable manual Pn 2.09 0
IV.COLB.HHZ. 2019-08-18T19:01:37.01 3.0 undecidable manual Sg 6.47 0
MN.PDG.HHZ. 2019-08-18T19:01:36.49 3.0 undecidable manual Pn 4.93 0
CR.STON.BHZ. 2019-08-18T19:01:20.88 3.0 positive manual Pn 5.39 0
IT.VNF1.HGZ. 2019-08-18T19:01:19.60 3.0 undecidable manual Sn -2.58 0
IV.EPZF.HHZ. 2019-08-18T19:01:11.77 3.0 positive manual Pn -7.24 0
IV.ILLI.HHZ. 2019-08-18T19:01:09.44 3.0 positive manual Pn -3.65 0
GU.BHB.HHZ. 2019-08-18T19:00:45.12 3.0 undecidable manual Pn 8.04 0
IV.TOLF.HHZ. 2019-08-18T19:00:45.16 3.0 undecidable manual Sg 3.05 0
IV.SMA1.EHZ. 2019-08-18T19:00:37.44 0.6 undecidable manual S 145 41.625 50 -0.2 46
IV.MF5.EHZ. 2019-08-18T19:00:36.35 0.3 undecidable manual S 81 34.2435 50 0.68 61
IV.SNTG.HHZ. 2019-08-18T19:00:36.03 0.1 undecidable manual S 347 36.0417 50 -0.13 94
IV.ARVD.HHZ. 2019-08-18T19:00:34.49 0.3 undecidable manual P 353 62.5929 50 -0.49 62
IV.EL6.EHZ. 2019-08-18T19:00:32.05 0.6 undecidable manual P 6 43.623 50 -0.01 47
IV.MMO1.EHZ. 2019-08-18T19:00:32.08 0.3 undecidable manual S 101 23.4543 112 -0.38 68
IV.SMA1.EHZ. 2019-08-18T19:00:32.09 0.6 undecidable manual P 145 41.625 50 0.35 44
IV.CSP1.EHZ. 2019-08-18T19:00:31.78 0.3 undecidable manual S 38 21.4674 114 -0.05 73
IV.MF5.EHZ. 2019-08-18T19:00:30.76 0.3 undecidable manual P 81 34.2435 50 0.14 70
IV.SNTG.HHZ. 2019-08-18T19:00:30.69 0.3 undecidable manual P 347 36.0417 50 -0.21 69
IV.CESI.HHZ. 2019-08-18T19:00:29.63 0.3 undecidable manual S 303 13.4754 125 0.25 71
IV.NRCA.HHZ. 2019-08-18T19:00:29.08 0.3 undecidable manual S 154 12.9759 126 -0.18 72
IV.MC2.EHZ. 2019-08-18T19:00:29.22 0.3 undecidable manual S 104 12.1767 127 0.18 73
IV.MMO1.EHZ. 2019-08-18T19:00:28.60 0.3 undecidable manual P 101 23.4543 112 -0.16 71
IV.FDMO.HHZ. 2019-08-18T19:00:28.86 0.3 undecidable manual S 18 11.4774 129 0.03 75
IV.CSP1.EHZ. 2019-08-18T19:00:28.33 0.3 undecidable manual P 38 21.4674 114 -0.06 73
IV.CESI.HHZ. 2019-08-18T19:00:27.15 0.3 undecidable manual P 303 13.4754 125 0.17 72
IT.MTCL.HGZ. 2019-08-18T19:00:27.72 0.1 undecidable manual S 330 7.0929 143 -0.06 100
IV.VIVA.HHZ. 2019-08-18T19:00:26.44 3.0 positive manual P -0.99 0
IV.ZCCA.HHZ. 2019-08-18T19:00:26.14 3.0 positive manual Pn 2.6 0
IV.MC2.EHZ. 2019-08-18T19:00:26.92 0.3 undecidable manual P 104 12.1767 127 0.14 73
IV.FDMO.HHZ. 2019-08-18T19:00:26.73 0.3 undecidable manual P 18 11.4774 129 0.07 74
IT.MTCL.HGZ. 2019-08-18T19:00:26.16 0.1 undecidable manual P 330 7.0929 143 0.1 99
IV.NRCA.HHZ. 2019-08-18T19:00:26.86 0.3 undecidable manual P 154 12.9759 126 -0.05 74
IV.LAV9.HHZ. 2019-08-18T19:00:23.76 3.0 undecidable manual P -3.35 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:1.1 0.00014600000000000003 0.12 AML other m 2019-08-18T19:00:29.28
IV.FDMO.HHN. ML:1.0 0.00011549999999999999 0.22 AML other m 2019-08-18T19:00:29.41
IV.CESI.HHN. ML:1.6 0.0003765 0.12 AML other m 2019-08-18T19:00:29.83
IV.CESI.HHE. ML:1.2 0.00016849999999999998 0.16 AML other m 2019-08-18T19:00:29.91
IV.NRCA.HHN. ML:1.0 0.000121 0.08 AML other m 2019-08-18T19:00:30.93
IV.NRCA.HHE. ML:1.0 0.00010283389000000002 0.1024 AML other m 2019-08-18T19:00:32.13
IV.CSP1.EHE. ML:1.1 0.00009148629 0.1664 AML other m 2019-08-18T19:00:32.19
IV.CSP1.EHN. ML:1.1 0.00008448636500000001 0.2304 AML other m 2019-08-18T19:00:32.79
IV.SNTG.HHE. ML:0.0 0.000013922043499999999 0.0768 AML other m 2019-08-18T19:00:36.97
IV.SNTG.HHN. ML:0.0 0.000015360000000000002 0.66 AML other m 2019-08-18T19:00:38.08
IV.EL6.EHE. ML:1.0 0.000029248429999999998 0.1792 AML other m 2019-08-18T19:00:40.44
IV.EL6.EHN. ML:1.0 0.000031675885 0.1536 AML other m 2019-08-18T19:00:40.29
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