Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 30-08-2020 and time 11:17:58 (Italy) in region 4 km E Preci (PG)

A magnitude ML 1.4 earthquake occured in region: 4 km E Preci (PG), on

  • 30-08-2020 09:17:58 (UTC)
  • 30-08-2020 11:17:58 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.87, 13.09 at 12 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
Castelsantangelo sul Nera MC 6 281 1005
Visso MC 7 1107 2112
Norcia PG 9 4957 7069
Ussita MC 9 444 7513
Sellano PG 14 1079 8592
Cerreto di Spoleto PG 15 1075 9667
Monte Cavallo MC 16 145 9812
Cascia PG 18 3217 13029
Bolognola MC 18 142 13171
Fiordimonte MC 19 202 13373
Acquacanina MC 19 121 13494
Fiastra MC 19 559 14053
Montemonaco AP 20 604 14657
Pieve Torina MC 20 1458 16115
Arquata del Tronto AP 20 1178 17293

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Foligno (57155 inhabitants)
50 Km NE of Terni (111501 inhabitants)
55 Km W of Teramo (54892 inhabitants)
63 Km NW of L'Aquila (69753 inhabitants)
63 Km E of Perugia (166134 inhabitants)
90 Km SW of Ancona (100861 inhabitants)
95 Km NE of Viterbo (67173 inhabitants)
95 Km W of Montesilvano (53738 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
Reviewed
Rev100 		ML 1.4 2020-08-30
09:17:58		 42.87 13.09 12 2020-08-30
09:26:58		 Sala Sismica INGV-Roma 82462631
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-30 09:17:58 ± 0.06
Latitude 42.87 ± 0.00
Longitude 13.09 ± 0.00
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82462631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 330
Semi-minor axis of confidence ellipse (meter) 22
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 254
Circular confidence region, given by single value of horizontal uncertainty (meter) 330
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 21
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
Epicentral distance of station farthest from the epicenter (degree) 0.44966
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 82462631
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-30 09:26:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PANTE.HHZ. 2020-08-30T09:19:24.01 3.0 negative manual Pg 5.14 0
IV.PTRJ.HNZ. 2020-08-30T09:19:08.64 3.0 undecidable manual Sg 5.69 0
IV.CAGR.HHZ. 2020-08-30T09:19:07.52 3.0 undecidable manual Pn -4.63 0
ST.RONC.HNZ. 2020-08-30T09:19:06.88 3.0 undecidable manual Sg 6.44 0
IV.MAGA.HHZ. 2020-08-30T09:19:03.57 3.0 undecidable manual Sg 7.81 0
IV.SERS.HHZ. 2020-08-30T09:18:57.36 3.0 undecidable manual Pn -8.58 0
IV.NDIM.HHZ. 2020-08-30T09:18:36.13 3.0 undecidable manual Sg 2.03 0
IV.ROSPO.HHZ. 2020-08-30T09:18:25.97 3.0 undecidable manual Pn 3.44 0
GU.GBOS.HHZ. 2020-08-30T09:18:23.94 3.0 undecidable manual Pn -6.38 0
IV.FNVD.HHZ. 2020-08-30T09:18:13.31 3.0 undecidable manual S -2.28 0
IV.LNSS.HNE. 2020-08-30T09:18:09.23 0.3 undecidable manual S 188 0.2689 92 0.06 72
IV.MTRA.EHZ. 2020-08-30T09:18:08.66 0.1 undecidable manual S 117 0.25 93 0.04 96
IV.GAVE.EHN. 2020-08-30T09:18:08.00 0.3 undecidable manual S 219 0.2284 93 0.02 73
IV.TERO.HHZ. 2020-08-30T09:18:07.78 0.1 undecidable manual P 123 0.4497 91 -0.07 92
IV.CESI.HNZ. 2020-08-30T09:18:07.00 0.1 undecidable manual S 315 0.1925 95 0.09 96
IV.MMO1.EHZ. 2020-08-30T09:18:06.20 0.1 undecidable manual S 80 0.1754 96 -0.19 95
IT.MTCL.HGE. 2020-08-30T09:18:05.27 0.1 undecidable manual S 332 0.1412 103 -0.15 96
IV.FDMO.HHZ. 2020-08-30T09:18:05.97 0.1 undecidable manual S 359 0.1673 97 -0.19 95
IV.MC2.EHZ. 2020-08-30T09:18:04.11 0.1 undecidable manual S 59 0.0827 129 0.26 94
IV.LNSS.HNE. 2020-08-30T09:18:04.75 0.1 undecidable manual P 188 0.2689 92 -0.01 96
IV.MTRA.EHZ. 2020-08-30T09:18:04.36 0.1 undecidable manual P 117 0.25 93 -0.09 95
IV.FEMA.HNE. 2020-08-30T09:18:04.17 0.1 undecidable manual S 342 0.098 121 -0.04 100
IV.GAVE.EHN. 2020-08-30T09:18:04.24 0.3 undecidable manual P 219 0.2284 93 0.16 71
IV.CRTC.HHZ. 2020-08-30T09:18:04.31 3.0 negative manual P 7.37 0
IV.CESI.HNZ. 2020-08-30T09:18:03.57 0.1 undecidable manual P 315 0.1925 95 0.11 96
IV.FDMO.HHZ. 2020-08-30T09:18:03.12 0.1 undecidable manual P 359 0.1673 97 0.09 97
IV.MMO1.EHZ. 2020-08-30T09:18:03.13 0.1 undecidable manual P 80 0.1754 96 -0.03 98
IT.MTCL.HGE. 2020-08-30T09:18:02.27 0.1 undecidable manual P 332 0.1412 103 -0.33 93
IV.NRCA.HNZ. 2020-08-30T09:18:02.74 0.1 undecidable manual S 155 0.0396 154 -0.31 95
IV.FEMA.HNE. 2020-08-30T09:18:02.30 0.1 undecidable manual P 342 0.098 121 0.4 92
IV.NRCA.HNZ. 2020-08-30T09:18:01.27 0.1 undecidable manual P 155 0.0396 154 0.04 100
IV.MC2.EHZ. 2020-08-30T09:18:01.89 0.1 undecidable manual P 59 0.0827 129 0.2 96
IV.ZCCA.HNZ. 2020-08-30T09:18:01.19 3.0 undecidable manual Pn -2.78 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:2.1 0.001875 0.16 AML other m 2020-08-30T09:18:02.78
IV.NRCA.HHE. ML:1.9 0.0011535 0.08 AML other m 2020-08-30T09:18:02.86
IV.FDMO.HHN. ML:1.3 0.000143 0.58 AML other m 2020-08-30T09:18:06.67
IV.FDMO.HHE. ML:1.1 0.0001057 1.16 AML other m 2020-08-30T09:18:06.16
IV.MTRA.EHE. ML:1.3 0.00010085 1.22 AML other m 2020-08-30T09:18:08.16
IV.MTRA.EHN. ML:1.2 8.29E-5 0.22 AML other m 2020-08-30T09:18:10.47
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