Earthquake with magnitude of ML 0.8 on date 21-10-2020 and time 18:13:08 (UTC) in region 1 km E Accumoli (RI)

A magnitude ML 0.8 earthquake occured in region: 1 km E Accumoli (RI), on

  • 21-10-2020 18:13:08 (UTC)
  • 21-10-2020 20:13:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6910, 13.2650 at 13 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Accumoli RI 1 667 667
Amatrice RI 7 2657 3324
Arquata del Tronto AP 10 1178 4502
Cittareale RI 12 482 4984
Acquasanta Terme AP 15 2916 7900
Campotosto AQ 17 542 8442
Montegallo AP 18 523 8965
Norcia PG 18 4957 13922
Montereale AQ 19 2581 16503
Capitignano AQ 19 665 17168
Valle Castellana TE 20 977 18145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km W of Teramo (54892 inhabitants)
39 Km N of L'Aquila (69753 inhabitants)
53 Km E of Terni (111501 inhabitants)
54 Km SE of Foligno (57155 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
82 Km W of Pescara (121014 inhabitants)
83 Km W of Chieti (51815 inhabitants)
85 Km SE of Perugia (166134 inhabitants)
89 Km NE of Guidonia Montecelio (88673 inhabitants)
89 Km NE of Tivoli (56533 inhabitants)
100 Km E 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 0.8 2020-10-21
18:13:08
42.6912 13.2648 13 2020-10-21
18:18:29
Sala Sismica INGV-Roma 83998191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-21 18:13:08 ± 0.05
Latitude 42.6912 ± 0.0036
Longitude 13.2648 ± 0.0037
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83998191

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 320
Semi-minor axis of confidence ellipse (meter) 234
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 260
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 52
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.05846
Epicentral distance of station farthest from the epicenter (degree) 0.40290
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 83998191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-21 18:18:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GAVE.EHZ. 2020-10-21T18:13:19.11 0.6 undecidable manual S 270 30.2475 95 0 49
IV.TERO.HHZ. 2020-10-21T18:13:18.54 0.6 undecidable manual S 105 28.6491 95 -0.15 48
IV.CSP1.EHZ. 2020-10-21T18:13:16.88 1.0 positive manual P 354 44.7219 93 0.01 24
IV.NRCA.HHZ. 2020-10-21T18:13:16.05 0.6 undecidable manual S 322 19.9689 102 -0.35 46
IV.RM33.EHZ. 2020-10-21T18:13:16.48 0.6 undecidable manual S 192 20.6682 101 -0.09 49
IV.GAVE.EHZ. 2020-10-21T18:13:14.63 1.0 undecidable manual P 270 30.2475 95 -0.02 24
IV.MC2.EHZ. 2020-10-21T18:13:14.09 0.6 negative manual P 346 25.1526 97 0.22 47
IV.MTRA.HNN. 2020-10-21T18:13:14.48 0.6 undecidable manual S 56 12.9759 118 -0.15 49
IV.TERO.HHZ. 2020-10-21T18:13:14.42 0.6 undecidable manual P 105 28.6491 95 0.01 49
IV.NRCA.HHZ. 2020-10-21T18:13:13.09 0.1 positive manual P 322 19.9689 102 0.01 100
IV.CAMP.HHE. 2020-10-21T18:13:13.15 0.1 undecidable manual P 146 20.868 100 -0.07 98
IV.LNSS.HNZ. 2020-10-21T18:13:13.22 0.1 undecidable manual P 242 20.7681 101 0.01 100
IV.RM33.EHZ. 2020-10-21T18:13:13.27 0.3 positive manual P 192 20.6682 101 0.09 74
IV.SMA1.EHZ. 2020-10-21T18:13:13.57 0.6 undecidable manual S 140 8.88 134 -0.17 49
IV.MMO1.EHZ. 2020-10-21T18:13:13.60 0.6 undecidable manual P 12 23.6541 98 -0.04 50
IV.T1299.HNN. 2020-10-21T18:13:13.18 0.6 undecidable manual S 167 6.4935 145 -0.15 49
IV.MTRA.HNN. 2020-10-21T18:13:12.19 0.1 undecidable manual P 56 12.9759 118 0.12 98
IV.SMA1.EHZ. 2020-10-21T18:13:11.73 0.6 positive manual P 140 8.88 134 0.17 49
IV.T1299.HNN. 2020-10-21T18:13:11.53 0.1 undecidable manual P 167 6.4935 145 0.22 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:0.9 0.00008817626000000001 0.1536 AML other m 2020-10-21T18:13:13.80
IV.SMA1.EHN. ML:1.0 0.00010858910499999999 0.2048 AML other m 2020-10-21T18:13:14.14
IV.TERO.HHE. ML:0.6 0.000021758115000000002 0.064 AML other m 2020-10-21T18:13:19.35
IV.TERO.HHN. ML:0.8 0.000029311045 0.064 AML other m 2020-10-21T18:13:19.35
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download