Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 20-08-2019 and time 17:05:22 (Italy) in region 6 km SE Preci (PG)

A magnitude ML 0.5 earthquake occured in region: 6 km SE Preci (PG), on

  • 20-08-2019 15:05:22 (UTC)
  • 20-08-2019 17:05:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8520, 13.0990 at 11 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 6 724 724
Castelsantangelo sul Nera MC 7 281 1005
Norcia PG 7 4957 5962
Visso MC 9 1107 7069
Ussita MC 11 444 7513
Sellano PG 15 1079 8592
Cerreto di Spoleto PG 15 1075 9667
Cascia PG 16 3217 12884
Monte Cavallo MC 18 145 13029
Arquata del Tronto AP 18 1178 14207
Bolognola MC 19 142 14349
Montegallo AP 19 523 14872
Montemonaco AP 19 604 15476

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
49 Km NE of Terni (111501 inhabitants)
54 Km W of Teramo (54892 inhabitants)
61 Km NW of L'Aquila (69753 inhabitants)
64 Km E of Perugia (166134 inhabitants)
92 Km SW of Ancona (100861 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
95 Km NE of Viterbo (67173 inhabitants)
100 Km NE of Guidonia Montecelio (88673 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
Bulletin
Rev1000 		ML 0.5 2019-08-20
15:05:22		 42.8523 13.0993 11 2019-11-13
14:31:04		 Bollettino Sismico Italiano INGV 72993771
Reviewed
Rev100 		ML 1.2 2019-08-20
15:05:22		 42.852 13.0947 10 2019-08-20
15:13:11		 Sala Sismica INGV-Roma 71655321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-20 15:05:22 ± 0.05
Latitude 42.8523 ± 0.0027
Longitude 13.0993 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 72993771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 393
Semi-minor axis of confidence ellipse (meter) 303
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 49
Circular confidence region, given by single value of horizontal uncertainty (meter) 390.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.43527
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.0
Num. used stations 2
Type of magnitude ML
Reference to an origin 72993771
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-10-02 14:06:43

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 71655321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-20 15:13:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
AC.SRN.HHZ. 2019-08-20T15:06:58.75 3.0 undecidable manual Pg 26.52 0
AC.VLO.HHZ. 2019-08-20T15:06:50.41 3.0 positive manual Pg 26.51 0
IV.HPAC.HHZ. 2019-08-20T15:06:46.87 3.0 undecidable manual Pg 17.360001 0
CR.STON.BHZ. 2019-08-20T15:06:46.56 3.0 undecidable manual Sn 1.24 0
IV.VULT.HHZ. 2019-08-20T15:06:39.57 3.0 undecidable manual Sg 18.85 0
IV.CAPR.HNZ. 2019-08-20T15:06:29.45 3.0 undecidable manual Sn -0.06 0
GU.RNCA.HHZ. 2019-08-20T15:06:25.72 3.0 undecidable manual Sg 6.64 0
IV.MTGR.HHZ. 2019-08-20T15:06:10.73 3.0 undecidable manual Pn 2.62 0
GU.GRAM.HHZ. 2019-08-20T15:06:08.92 3.0 undecidable manual Sg 3.76 0
IV.PAOL.HHZ. 2019-08-20T15:06:03.42 3.0 undecidable manual Sn -0.92 0
IV.EUCT.HNZ. 2019-08-20T15:06:00.95 3.0 positive manual Pg 11.44 0
GU.CARD.HHZ. 2019-08-20T15:05:52.40 3.0 undecidable manual Sg 0.54 0
IV.MGR.HHZ. 2019-08-20T15:05:50.25 3.0 undecidable manual Pn -1.4 0
IV.ZONE.HHZ. 2019-08-20T15:05:48.92 3.0 positive manual Pn -1.68 0
IV.TERO.HHZ. 2019-08-20T15:05:37.93 0.6 undecidable manual S 122 48.3183 50 0 48
GU.GRAM.HHZ. 2019-08-20T15:05:33.62 3.0 positive manual Pn -2.58 0
IV.CSP1.EHZ. 2019-08-20T15:05:32.39 0.3 undecidable manual S 18 27.9498 50 -0.09 73
IV.LNSS.HNZ. 2019-08-20T15:05:32.44 0.3 undecidable manual S 190 28.0497 50 -0.08 73
IV.MTRA.EHZ. 2019-08-20T15:05:31.79 0.3 undecidable manual S 114 26.3514 50 -0.28 70
IV.CESI.HHE. 2019-08-20T15:05:31.24 0.6 undecidable manual S 317 23.1546 50 0.03 49
IV.TERO.HHZ. 2019-08-20T15:05:31.47 0.3 undecidable manual P 122 48.3183 50 0.08 70
IV.SAMA.HHZ. 2019-08-20T15:05:30.27 3.0 undecidable manual Sn 1.9 0
IV.MMO1.EHZ. 2019-08-20T15:05:30.04 0.3 undecidable manual S 74 19.1697 119 -0.01 75
IV.FDMO.HHZ. 2019-08-20T15:05:30.23 0.3 undecidable manual S 357 20.4684 117 -0.21 72
IV.ASSB.HHN. 2019-08-20T15:05:30.08 0.1 undecidable manual P 301 41.5251 50 -0.26 91
IV.MML1.HNE. 2019-08-20T15:05:29.15 0.1 undecidable manual P 340 30.747 50 0.47 89
IV.LNSS.HNZ. 2019-08-20T15:05:28.44 0.3 undecidable manual P 190 28.0497 50 0.18 71
IV.FEMA.HNE. 2019-08-20T15:05:28.13 0.6 undecidable manual S 342 12.876 129 -0.09 50
IV.CSP1.EHZ. 2019-08-20T15:05:28.24 0.3 undecidable manual P 18 27.9498 50 0 74
IV.GAVE.EHN. 2019-08-20T15:05:27.80 0.1 undecidable manual P 223 24.3534 50 0.11 97
IV.FDMO.HHZ. 2019-08-20T15:05:27.10 0.3 undecidable manual P 357 20.4684 117 0.04 74
IV.MC2.EHZ. 2019-08-20T15:05:27.64 0.3 undecidable manual S 48 9.7791 137 0.19 73
IV.MTRA.EHZ. 2019-08-20T15:05:27.85 0.1 undecidable manual P 114 26.3514 50 -0.15 96
IV.CESI.HHE. 2019-08-20T15:05:27.51 0.1 undecidable manual P 317 23.1546 50 0 99
IV.MMO1.EHZ. 2019-08-20T15:05:26.91 0.1 undecidable manual P 74 19.1697 119 0.07 99
IT.MTCL.HGZ. 2019-08-20T15:05:26.63 0.3 undecidable manual P 333 17.6712 121 0.05 74
IV.NRCA.HHZ. 2019-08-20T15:05:25.83 0.6 undecidable manual S 150 2.3976 167 -0.38 48
IV.MC2.EHZ. 2019-08-20T15:05:25.65 0.3 undecidable manual P 48 9.7791 137 0.31 71
IV.FEMA.HNE. 2019-08-20T15:05:25.44 0.1 undecidable manual P 342 12.876 129 -0.34 94
IV.NRCA.HHZ. 2019-08-20T15:05:24.76 0.1 undecidable manual P 150 2.3976 167 0.14 100
TV.SF04.EHZ. 2019-08-20T15:05:16.76 3.0 undecidable manual S -1.5 0
IV.RIBO.EHZ.01 2019-08-20T15:05:15.08 3.0 positive manual P -0.52 0
IV.APEC.HHZ. 2019-08-20T15:05:14.07 3.0 negative manual P -2.12 0
TV.SF04.EHZ. 2019-08-20T15:05:08.24 3.0 negative manual P -1.61 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:0.4 0.00002025 0.16 AML other m 2019-08-20T15:05:31.56
IV.FDMO.HHE. ML:0.4 0.000020700000000000002 0.82 AML other m 2019-08-20T15:05:33.47
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