Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 20-07-2019 and time 20:29:46 (UTC) in region 4 km S Preci (PG)

A magnitude ML 1.1 earthquake occured in region: 4 km S Preci (PG), on

  • 20-07-2019 20:29:46 (UTC)
  • 20-07-2019 22:29:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8470, 13.0420 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.

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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
Preci PG 4 724 724
Norcia PG 7 4957 5681
Visso MC 10 1107 6788
Sellano PG 11 1079 7867
Cerreto di Spoleto PG 11 1075 8942
Castelsantangelo sul Nera MC 11 281 9223
Ussita MC 14 444 9667
Cascia PG 14 3217 12884
Monte Cavallo MC 17 145 13029
Vallo di Nera PG 17 364 13393
Poggiodomo PG 17 117 13510

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km E of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
58 Km W of Teramo (54892 inhabitants)
61 Km E of Perugia (166134 inhabitants)
62 Km NW of L'Aquila (69753 inhabitants)
90 Km NE of Viterbo (67173 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
98 Km N of Guidonia Montecelio (88673 inhabitants)
98 Km W of Montesilvano (53738 inhabitants)
100 Km N of Tivoli (56533 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 2019-07-20
20:29:46		 42.8468 13.0425 10 2019-07-20
20:37:37		 Sala Sismica INGV-Roma 70746041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-07-20 20:29:46 ± 0.06
Latitude 42.8468 ± 0.0036
Longitude 13.0425 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 70746041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 360
Semi-minor axis of confidence ellipse (meter) 335
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 96
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 49
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 29
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) 0.48384
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 70746041
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-07-20 20:37:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IT.VNF1.HGZ. 2019-07-20T20:30:37.65 3.0 undecidable manual S 0.08 0
IV.LAV9.HNZ. 2019-07-20T20:30:06.14 3.0 undecidable manual P -3.83 0
IV.EL6.EHZ. 2019-07-20T20:30:03.83 0.6 undecidable manual S 5 53.7018 50 0.65 40
IV.MOMA.HHE. 2019-07-20T20:29:59.37 0.6 undecidable manual S 263 38.7279 50 0.19 47
IV.MF5.EHZ. 2019-07-20T20:29:59.49 0.6 undecidable manual S 65 37.3293 50 0.69 41
IV.RM33.EHZ. 2019-07-20T20:29:59.69 0.6 undecidable manual S 159 40.0266 50 0.17 47
IV.ASSB.HHZ. 2019-07-20T20:29:58.56 0.6 undecidable manual S 305 37.9287 50 -0.41 45
IV.ARRO.EHZ. 2019-07-20T20:29:58.95 0.6 undecidable manual S 217 37.3293 50 0.16 47
IV.SMA1.EHZ. 2019-07-20T20:29:57.69 0.6 undecidable manual S 135 33.8439 50 -0.18 47
IV.MTRA.EHZ. 2019-07-20T20:29:56.74 0.6 undecidable manual S 109 30.5472 50 -0.24 47
IV.EL6.EHZ. 2019-07-20T20:29:55.79 0.1 undecidable manual P 5 53.7018 50 -0.17 91
IV.LNSS.HHZ. 2019-07-20T20:29:55.80 0.6 undecidable manual S 180 27.0507 50 -0.27 47
IV.MMO1.EHZ. 2019-07-20T20:29:54.71 0.6 undecidable manual S 76 23.8539 112 -0.34 46
IV.SNTG.HHZ. 2019-07-20T20:29:54.52 0.1 undecidable manual P 350 46.0206 50 -0.25 91
IV.MOMA.HHE. 2019-07-20T20:29:54.33 0.6 undecidable manual P 263 38.7279 50 0.68 41
IV.GAVE.EHZ. 2019-07-20T20:29:54.18 0.6 undecidable manual S 215 20.9679 115 0.04 50
IV.MF5.EHZ. 2019-07-20T20:29:53.72 0.6 undecidable manual P 65 37.3293 50 0.29 46
IV.SMA1.EHZ. 2019-07-20T20:29:53.06 1.0 undecidable manual P 135 33.8439 50 0.17 24
IV.RM33.EHZ. 2019-07-20T20:29:53.77 1.0 undecidable manual P 159 40.0266 50 -0.08 24
IV.ASSB.HHZ. 2019-07-20T20:29:53.33 0.3 positive manual P 305 37.9287 50 -0.21 70
IV.FDMO.HHZ. 2019-07-20T20:29:53.97 0.6 undecidable manual S 10 21.3675 115 -0.29 47
IV.ARRO.EHZ. 2019-07-20T20:29:53.28 1.0 undecidable manual P 217 37.3293 50 -0.15 24
IV.MTRA.EHZ. 2019-07-20T20:29:52.26 0.1 undecidable manual P 109 30.5472 50 -0.12 96
IV.MC2.EHZ. 2019-07-20T20:29:52.28 0.6 undecidable manual S 59 13.875 125 0.28 48
IV.MMO1.EHZ. 2019-07-20T20:29:51.18 0.1 undecidable manual P 76 23.8539 112 -0.09 98
IV.LNSS.HHZ. 2019-07-20T20:29:51.69 0.1 undecidable manual P 180 27.0507 50 -0.17 96
IV.FDMO.HHZ. 2019-07-20T20:29:50.74 0.1 positive manual P 10 21.3675 115 -0.07 99
IV.NRCA.HHZ. 2019-07-20T20:29:50.00 0.3 undecidable manual S 104 5.994 149 -0.1 76
IV.GAVE.EHZ. 2019-07-20T20:29:50.88 0.1 positive manual P 215 20.9679 115 0.14 97
IV.MC2.EHZ. 2019-07-20T20:29:49.78 0.3 positive manual P 59 13.875 125 0.27 72
IV.NRCA.HHZ. 2019-07-20T20:29:48.55 0.1 undecidable manual P 104 5.994 149 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:1.2 0.000115 0.12 AML other m 2019-07-20T20:29:54.45
IV.FDMO.HHN. ML:1.1 0.00007925 0.22 AML other m 2019-07-20T20:29:54.57
IV.GAVE.EHN. ML:1.3 0.0001505 0.16 AML other m 2019-07-20T20:29:55.09
IV.GAVE.EHE. ML:1.2 0.0001215 0.44 AML other m 2019-07-20T20:29:56.10
IV.LNSS.HHE. ML:1.3 0.00010225 0.14 AML other m 2019-07-20T20:29:56.20
IV.LNSS.HHN. ML:1.4 0.0001365 0.16 AML other m 2019-07-20T20:29:56.32
IV.MTRA.EHE. ML:1.4 0.000131 0.3 AML other m 2019-07-20T20:29:57.27
IV.MTRA.EHN. ML:1.4 0.00011094999999999999 0.3 AML other m 2019-07-20T20:29:57.28
IV.ASSB.HHN. ML:1.0 0.0000415 0.18 AML other m 2019-07-20T20:29:58.88
IV.ASSB.HHE. ML:1.1 0.000043249999999999994 1.4 AML other m 2019-07-20T20:29:58.19
IV.ARRO.EHE. ML:0.8 0.0000267 0.86 AML other m 2019-07-20T20:29:59.57
IV.ARRO.EHN. ML:0.8 0.000024299999999999998 0.34 AML other m 2019-07-20T20:30:00.22
IV.SNTG.HHN. ML:0.8 0.000018950000000000003 0.62 AML other m 2019-07-20T20:30:01.98
IV.SNTG.HHE. ML:0.9 0.00002425 1.68 AML other m 2019-07-20T20:30:02.11
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