Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 31-08-2020 and time 04:47:25 (Italy) in region 5 km SW Villetta Barrea (AQ)

A magnitude ML 1.0 earthquake occured in region: 5 km SW Villetta Barrea (AQ), on

  • 31-08-2020 02:47:25 (UTC)
  • 31-08-2020 04:47:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7490, 13.8890 at 8 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
Villetta Barrea AQ 5 653 653
Civitella Alfedena AQ 5 296 949
Opi AQ 6 420 1369
San Donato Val di Comino FR 8 2107 3476
Barrea AQ 9 726 4202
Settefrati FR 9 728 4930
Pescasseroli AQ 11 2203 7133
Picinisco FR 11 1218 8351
Alfedena AQ 12 864 9215
Gallinaro FR 12 1269 10484
Scontrone AQ 13 574 11058
Alvito FR 14 2713 13771
Pizzone IS 15 329 14100
Montenero Val Cocchiara IS 15 538 14638
San Biagio Saracinisco FR 15 349 14987
Villa Latina FR 16 1241 16228
Atina FR 16 4316 20544
Posta Fibreno FR 17 1139 21683
Vicalvi FR 17 783 22466
Scanno AQ 17 1847 24313
Campoli Appennino FR 17 1725 26038
Castel San Vincenzo IS 18 516 26554
Castel di Sangro AQ 19 6538 33092
Roccaraso AQ 19 1627 34719
Pescosolido FR 19 1555 36274
Casalvieri FR 19 2698 38972
Casalattico FR 20 574 39546
Fontechiari FR 20 1303 40849
Belmonte Castello FR 20 739 41588

Municipalities with at least 50000 inhabitants

An earthquake occurred to
71 Km SW of Chieti (51815 inhabitants)
78 Km SE of L'Aquila (69753 inhabitants)
84 Km NW of Caserta (76326 inhabitants)
84 Km SW of Pescara (121014 inhabitants)
88 Km E of Latina (125985 inhabitants)
88 Km S of Montesilvano (53738 inhabitants)
90 Km N of Aversa (53047 inhabitants)
92 Km E of Velletri (53303 inhabitants)
93 Km E of Tivoli (56533 inhabitants)
95 Km N of Giugliano in Campania (122974 inhabitants)
98 Km N of Marano di Napoli (59874 inhabitants)
98 Km NW of Acerra (59573 inhabitants)
98 Km NW of Afragola (65057 inhabitants)
100 Km NW of Casoria (77642 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 1.0 2020-08-31
02:47:25		 41.7487 13.8888 8 2020-08-31
02:53:07		 Sala Sismica INGV-Roma 82484671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-31 02:47:25 ± 0.15
Latitude 41.7487 ± 0.0054
Longitude 13.8888 ± 0.0072
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82484671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 701
Semi-minor axis of confidence ellipse (meter) 252
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 38
Circular confidence region, given by single value of horizontal uncertainty (meter) 700.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.05216
Epicentral distance of station farthest from the epicenter (degree) 0.26350
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 82484671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-31 02:53:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VVLD.HHZ. 2020-08-31T02:47:34.51 0.3 undecidable manual S 302 25.752 107 -0.22 70
IV.CERA.HHZ. 2020-08-31T02:47:32.54 0.3 undecidable manual S 147 19.869 111 -0.26 70
IV.INTR.HHZ. 2020-08-31T02:47:31.35 0.1 undecidable manual P 3 29.1486 105 -0.1 95
IV.POFI.HHZ. 2020-08-31T02:47:31.39 0.3 undecidable manual S 257 15.0738 117 0.12 72
IV.MCI.EHE. 2020-08-31T02:47:31.60 0.1 undecidable manual P 192 29.2485 105 0.14 94
IV.VVLD.HHZ. 2020-08-31T02:47:30.71 0.1 negative manual P 302 25.752 107 -0.07 96
IV.RNI2.HHZ. 2020-08-31T02:47:30.54 0.1 undecidable manual P 103 22.3554 109 0.4 90
IV.CERA.HHZ. 2020-08-31T02:47:29.35 0.1 undecidable manual P 147 19.869 111 -0.32 92
IT.OPI.HGE. 2020-08-31T02:47:28.73 0.1 undecidable manual S 302 5.7942 144 -0.02 100
IV.POFI.HHZ. 2020-08-31T02:47:28.89 0.1 positive manual P 257 15.0738 117 0.1 97
IT.OPI.HGE. 2020-08-31T02:47:27.47 0.1 undecidable manual P 302 5.7942 144 0.14 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.POFI.HHE. ML:0.6 0.00003933357 0.12 AML other m 2020-08-31T02:47:31.57
IV.POFI.HHN. ML:0.7 0.000049841155 0.2592 AML other m 2020-08-31T02:47:31.76
IV.POFI.HNE. ML:1.0 0.00010342607500000001 0.6592 AML other m 2020-08-31T02:47:36.34
IV.POFI.HNN. ML:1.0 0.000114395205 0.6496 AML other m 2020-08-31T02:47:33.85
IV.CERA.HHE. ML:1.0 0.00006873148 0.28 AML other m 2020-08-31T02:47:32.94
IV.CERA.HHN. ML:1.1 0.0000901449 0.3984 AML other m 2020-08-31T02:47:32.81
IV.CERA.HNE. ML:0.6 0.00003707551 43.0592 AML other m 2020-08-31T02:47:28.75
IV.CERA.HNN. ML:1.2 0.00012851021 0.4592 AML other m 2020-08-31T02:47:36.91
IV.RNI2.HHE. ML:0.9 0.000057948199999999995 0.16 AML other m 2020-08-31T02:47:36.13
IV.RNI2.HHN. ML:0.7 0.0000363388148 45.4592 AML other m 2020-08-31T02:47:30.76
IV.RNI2.HNE. ML:0.9 0.000059044 0.1792 AML other m 2020-08-31T02:47:36.14
IV.RNI2.HNN. ML:1.0 0.00007580698 2 AML other m 2020-08-31T02:47:30.62
IV.VVLD.HHE. ML:0.9 0.0000433657 0.1008 AML other m 2020-08-31T02:47:35.48
IV.VVLD.HHN. ML:1.0 0.000066021915 0.2208 AML other m 2020-08-31T02:47:35.49
IV.VVLD.HNE. ML:1.1 0.00007999291499999999 0.6896 AML other m 2020-08-31T02:47:43.38
IV.VVLD.HNN. ML:1.3 0.0001163926 0.96 AML other m 2020-08-31T02:47:45.11
IV.INTR.HHE. ML:1.0 0.0000431675905 0.1984 AML other m 2020-08-31T02:47:38.62
IV.INTR.HHN. ML:1.0 0.000057288735 0.8992 AML other m 2020-08-31T02:47:45.70
IV.INTR.HNE. ML:1.4 0.00012822361999999997 0.7808 AML other m 2020-08-31T02:47:42.33
IV.INTR.HNN. ML:1.3 0.000109169665 0.8112 AML other m 2020-08-31T02:47:32.63
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