Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 13-10-2020 and time 09:03:42 (UTC) in region 8 km NW Accumoli (RI)

A magnitude ML 0.9 earthquake occured in region: 8 km NW Accumoli (RI), on

  • 13-10-2020 09:03:42 (UTC)
  • 13-10-2020 11:03:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7430, 13.1730 at 14 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
Accumoli RI 8 667 667
Norcia PG 9 4957 5624
Arquata del Tronto AP 11 1178 6802
Cascia PG 13 3217 10019
Cittareale RI 14 482 10501
Amatrice RI 16 2657 13158
Castelsantangelo sul Nera MC 17 281 13439
Montegallo AP 17 523 13962
Preci PG 19 724 14686
Acquasanta Terme AP 20 2916 17602
Poggiodomo PG 20 117 17719

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km W of Teramo (54892 inhabitants)
45 Km SE of Foligno (57155 inhabitants)
47 Km NW of L'Aquila (69753 inhabitants)
47 Km E of Terni (111501 inhabitants)
76 Km SE of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
91 Km W of Pescara (121014 inhabitants)
92 Km NE of Tivoli (56533 inhabitants)
92 Km W of Chieti (51815 inhabitants)
95 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
Bulletin
Rev1000 		ML 0.9 2020-10-13
09:03:42		 42.743 13.1727 14 2021-02-26
14:56:00		 Bollettino Sismico Italiano INGV 84052671
Reviewed
Rev100 		ML 1.0 2020-10-13
09:03:42		 42.7383 13.1763 11 2020-10-13
09:12:11		 Sala Sismica INGV-Roma 83750671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-13 09:03:42 ± 0.06
Latitude 42.7430 ± 0.0027
Longitude 13.1727 ± 0.0037
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84052671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 278
Semi-minor axis of confidence ellipse (meter) 141
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 229
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.58906
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 84052671
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-23 09:14:10

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 83750671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-13 09:12:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
XK.ALB1.HHZ. 2020-10-13T09:05:40.45 3.0 undecidable manual Sn -4.25 0
IV.EUCT.HNZ. 2020-10-13T09:05:29.73 3.0 undecidable manual Sn 3.81 0
IV.MTGR.HHZ. 2020-10-13T09:05:08.90 3.0 undecidable manual Pg 13.35 0
IV.CMPR.HHZ. 2020-10-13T09:05:07.10 3.0 undecidable manual Sn 2.24 0
IV.PETRA.HHZ. 2020-10-13T09:05:02.24 3.0 undecidable manual Pn 5.27 0
IV.MARS.EHZ. 2020-10-13T09:04:58.11 3.0 positive manual Pn 0.49 0
XK.ALB1.HNZ. 2020-10-13T09:04:53.34 3.0 undecidable manual Pn 2.19 0
IV.FIR.HHZ. 2020-10-13T09:04:38.94 3.0 undecidable manual Sg 3.68 0
IV.MNTV.HNZ. 2020-10-13T09:04:30.21 3.0 positive manual Pn 1.4 0
IV.SFI.EHZ. 2020-10-13T09:04:29.82 3.0 undecidable manual S 0.2 0
IV.TERO.HHZ. 2020-10-13T09:03:54.50 0.3 undecidable manual S 111 37.629 97 -0.16 69
IV.CESI.HHE. 2020-10-13T09:03:54.27 0.6 undecidable manual S 323 36.3414 97 -0.04 48
IV.ATCC.EHZ. 2020-10-13T09:03:53.68 0.6 undecidable manual P 319 65.3901 93 0.06 45
IV.FDMO.HHZ. 2020-10-13T09:03:53.77 0.3 undecidable manual S 348 33.3444 98 0.26 69
IV.FEMA.HNZ. 2020-10-13T09:03:52.00 0.6 undecidable manual S 338 26.2515 102 0.33 46
IV.CAMP.HHE. 2020-10-13T09:03:52.51 0.6 undecidable manual S 140 30.0477 100 -0.13 47
IV.RM33.HNZ. 2020-10-13T09:03:51.69 0.6 undecidable manual S 172 26.1516 102 0.05 49
IV.GAVE.EHZ. 2020-10-13T09:03:50.79 0.3 undecidable manual S 256 23.3544 105 -0.12 72
IV.MMO1.EHZ. 2020-10-13T09:03:50.47 0.3 undecidable manual S 36 21.3675 107 0.06 73
IV.TERO.HHZ. 2020-10-13T09:03:49.36 0.3 undecidable manual P 111 37.629 97 0 72
IV.LNSS.HHZ. 2020-10-13T09:03:49.66 0.6 undecidable manual S 215 18.9699 111 -0.12 48
IV.MC2.EHZ. 2020-10-13T09:03:49.78 0.6 undecidable manual S 4 18.7701 111 0.05 49
IV.CESI.HHE. 2020-10-13T09:03:49.16 0.6 undecidable manual P 323 36.3414 97 0 48
IV.MTRA.HNZ. 2020-10-13T09:03:49.52 0.3 undecidable manual S 85 18.2706 112 -0.11 72
IV.SMA1.EHZ. 2020-10-13T09:03:49.72 0.6 undecidable manual S 133 18.1707 112 0.12 49
IV.FDMO.HHZ. 2020-10-13T09:03:48.60 0.6 undecidable manual P 348 33.3444 98 -0.09 47
IT.MTCL.HGZ. 2020-10-13T09:03:48.10 0.1 undecidable manual P 333 31.2465 99 -0.28 92
IV.CAMP.HHE. 2020-10-13T09:03:48.02 0.1 undecidable manual P 140 30.0477 100 -0.17 93
IV.RM33.HNZ. 2020-10-13T09:03:47.70 0.6 undecidable manual P 172 26.1516 102 0.09 48
IV.GAVE.EHZ. 2020-10-13T09:03:47.20 0.3 undecidable manual P 256 23.3544 105 0 74
IV.NRCA.HHZ. 2020-10-13T09:03:47.68 0.3 undecidable manual S 335 11.0778 131 -0.31 70
IV.FEMA.HNZ. 2020-10-13T09:03:47.55 0.3 undecidable manual P 338 26.2515 102 -0.08 72
IV.SMA1.EHZ. 2020-10-13T09:03:46.35 0.6 undecidable manual P 133 18.1707 112 -0.09 48
IV.T1299.HNZ. 2020-10-13T09:03:46.45 0.1 undecidable manual P 143 14.9739 120 0.46 91
IV.MMO1.EHZ. 2020-10-13T09:03:46.94 0.1 undecidable manual P 36 21.3675 107 0.04 98
IV.LNSS.HHZ. 2020-10-13T09:03:46.61 0.3 undecidable manual P 215 18.9699 111 0.07 73
IV.MC2.EHZ. 2020-10-13T09:03:46.78 0.6 undecidable manual P 4 18.7701 111 0.27 47
IV.MTRA.HNZ. 2020-10-13T09:03:46.42 0.1 undecidable manual P 85 18.2706 112 -0.03 98
IV.NRCA.HHZ. 2020-10-13T09:03:45.50 0.1 negative manual P 335 11.0778 131 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.HNE. ML:1.2 0.000084275265 1.2224 AML other m 2020-10-13T09:03:50.93
IV.GAVE.EHN. ML:0.8 0.00003610591 2.1824 AML other m 2020-10-13T09:03:50.37
IV.GAVE.EHE. ML:0.9 0.000050979835 1.9392 AML other m 2020-10-13T09:03:51.09
IV.FDMO.HHE. ML:0.7 0.000022039525 3.1424 AML other m 2020-10-13T09:03:53.29
IV.FDMO.HHN. ML:0.7 0.000017666665 3.04 AML other m 2020-10-13T09:03:54.11
IV.TERO.HHN. ML:1.0 0.00003869351 1.2224 AML other m 2020-10-13T09:03:53.70
IV.TERO.HHE. ML:0.8 0.000023862825 1.8176 AML other m 2020-10-13T09:03:55.60
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