Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 15-10-2020 and time 07:33:02 (Italy) in region 6 km NW Accumoli (RI)

A magnitude ML 1.2 earthquake occured in region: 6 km NW Accumoli (RI), on

  • 15-10-2020 05:33:02 (UTC)
  • 15-10-2020 07:33:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7270, 13.1900 at 10 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 6 667 667
Arquata del Tronto AP 10 1178 1845
Norcia PG 11 4957 6802
Cittareale RI 12 482 7284
Amatrice RI 13 2657 9941
Cascia PG 14 3217 13158
Montegallo AP 18 523 13681
Acquasanta Terme AP 19 2916 16597
Castelsantangelo sul Nera MC 19 281 16878

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
45 Km NW of L'Aquila (69753 inhabitants)
47 Km SE of Foligno (57155 inhabitants)
48 Km E of Terni (111501 inhabitants)
78 Km SE of Perugia (166134 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
89 Km W of Pescara (121014 inhabitants)
89 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km W of Chieti (51815 inhabitants)
91 Km NE of Tivoli (56533 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 1.2 2020-10-15
05:33:02		 42.7267 13.19 10 2021-02-26
14:56:12		 Bollettino Sismico Italiano INGV 85797561
Reviewed
Rev100 		ML 1.2 2020-10-15
05:33:02		 42.7288 13.1953 11 2020-10-15
05:38:47		 Sala Sismica INGV-Roma 83796411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-15 05:33:02 ± 0.06
Latitude 42.7267 ± 0.0027
Longitude 13.1900 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85797561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 399
Semi-minor axis of confidence ellipse (meter) 202
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) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 62
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.11421
Epicentral distance of station farthest from the epicenter (degree) 0.36512
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 83796411
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-15 05:38:47

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 85797561
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-28 15:42:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHZ. 2020-10-15T05:33:16.15 0.6 undecidable manual S 37 36.3414 50 0.74 40
IV.FEMA.HNE. 2020-10-15T05:33:13.06 0.6 undecidable manual S 336 28.4493 50 -0.26 47
IV.RM33.EHZ. 2020-10-15T05:33:11.97 0.3 undecidable manual S 175 24.2535 112 -0.09 74
IV.MMO1.EHZ. 2020-10-15T05:33:11.17 0.6 undecidable manual S 30 22.1556 114 -0.23 48
IV.MC2.EHZ. 2020-10-15T05:33:11.19 0.6 undecidable manual S 360 20.4684 116 0.31 47
IV.MF5.EHZ. 2020-10-15T05:33:10.48 0.3 undecidable manual P 37 36.3414 50 0.32 69
IV.CSP1.EHZ. 2020-10-15T05:33:10.92 0.3 undecidable manual P 2 40.5261 50 0.11 71
IV.LNSS.HHZ. 2020-10-15T05:33:10.40 0.6 undecidable manual S 222 18.3705 118 0.18 49
IV.CESI.HHZ. 2020-10-15T05:33:10.26 0.3 undecidable manual P 323 38.628 50 -0.25 70
IV.FDMO.HHZ. 2020-10-15T05:33:09.87 0.3 undecidable manual P 346 35.3424 50 -0.14 72
IV.SMA1.EHZ. 2020-10-15T05:33:09.61 0.3 undecidable manual S 132 15.9729 122 0.12 74
IV.MTRA.HNZ. 2020-10-15T05:33:09.61 0.3 undecidable manual S 79 17.1717 120 -0.24 73
IV.TERO.HHZ. 2020-10-15T05:33:09.64 0.3 undecidable manual P 109 35.6421 50 -0.42 68
IV.FEMA.HNE. 2020-10-15T05:33:09.26 0.6 undecidable manual P 336 28.4493 50 0.31 47
IV.NRCA.HNZ. 2020-10-15T05:33:08.69 0.3 undecidable manual S 333 13.3755 126 -0.06 76
IV.RM33.EHZ. 2020-10-15T05:33:08.20 0.6 undecidable manual P 175 24.2535 112 -0.03 50
IV.GAVE.EHZ. 2020-10-15T05:33:08.19 0.1 undecidable manual P 261 24.4533 112 -0.07 99
IV.T1299.HNN. 2020-10-15T05:33:08.94 0.3 undecidable manual S 144 12.6762 128 0.37 71
IV.MMO1.EHZ. 2020-10-15T05:33:07.73 0.3 undecidable manual P 30 22.1556 114 -0.11 74
IV.LNSS.HHZ. 2020-10-15T05:33:07.24 0.1 undecidable manual P 222 18.3705 118 0.08 100
IV.MC2.EHZ. 2020-10-15T05:33:07.47 0.3 undecidable manual P 360 20.4684 116 -0.07 75
IV.NRCA.HNZ. 2020-10-15T05:33:06.42 0.1 undecidable manual P 333 13.3755 126 0.11 100
IV.SMA1.EHZ. 2020-10-15T05:33:06.83 0.1 undecidable manual P 132 15.9729 122 0.09 100
IV.MTRA.HNZ. 2020-10-15T05:33:06.90 0.3 undecidable manual P 79 17.1717 120 -0.05 75
IV.T1299.HNN. 2020-10-15T05:33:05.84 0.3 undecidable manual P 144 12.6762 128 -0.37 71
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1.3 0.000177 1.34 AML other m 2020-10-15T05:33:09.16
IV.MTRA.EHN. ML:1.2 0.00014649999999999998 1.26 AML other m 2020-10-15T05:33:10.69
IV.SMA1.EHE. ML:1.2 0.00013700000000000002 1.04 AML other m 2020-10-15T05:33:10.19
IV.LNSS.HHN. ML:1.3 0.000175 0.92 AML other m 2020-10-15T05:33:10.51
IV.SMA1.EHN. ML:1.1 0.00010899999999999999 0.44 AML other m 2020-10-15T05:33:10.52
IV.LNSS.HHE. ML:1.2 0.0001424 1.22 AML other m 2020-10-15T05:33:11.64
IV.TERO.HHE. ML:1.1 0.000049449999999999996 0.48 AML other m 2020-10-15T05:33:15.08
IV.TERO.HHN. ML:1.3 0.00008460000000000001 1.08 AML other m 2020-10-15T05:33:15.09
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