Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 02-10-2021 and time 03:01:09 (UTC) in region 5 km NW Accumoli (RI)

A magnitude ML 1.2 earthquake occured in region: 5 km NW Accumoli (RI), on

  • 02-10-2021 03:01:09 (UTC)
  • 02-10-2021 05:01:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7350, 13.2100 at 10 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
Accumoli RI 5 667 667
Arquata del Tronto AP 8 1178 1845
Norcia PG 12 4957 6802
Amatrice RI 13 2657 9459
Cittareale RI 14 482 9941
Montegallo AP 16 523 10464
Cascia PG 16 3217 13681
Acquasanta Terme AP 17 2916 16597
Castelsantangelo sul Nera MC 19 281 16878

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km W of Teramo (54892 inhabitants)
45 Km NW of L'Aquila (69753 inhabitants)
48 Km SE of Foligno (57155 inhabitants)
50 Km E of Terni (111501 inhabitants)
79 Km SE of Perugia (166134 inhabitants)
81 Km W of Montesilvano (53738 inhabitants)
88 Km W of Pescara (121014 inhabitants)
89 Km W of Chieti (51815 inhabitants)
91 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km NE of Tivoli (56533 inhabitants)
97 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 1.2 2021-10-02
03:01:09		 42.7347 13.2102 10 2021-10-02
03:06:52		 Sala Sismica INGV-Roma 96119601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-02 03:01:09 ± 0.06
Latitude 42.7347 ± 0.0027
Longitude 13.2102 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96119601

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 400
Semi-minor axis of confidence ellipse (meter) 54
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 262
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) 65
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 25
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.40200
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 96119601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-02 03:06:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RCAV.EHZ. 2021-10-02T03:01:27.54 3.0 undecidable manual P 0.04 0
IV.MML1.EHZ. 2021-10-02T03:01:25.10 3.0 undecidable manual S -0.14 0
IV.MF5.EHZ. 2021-10-02T03:01:22.17 0.3 undecidable manual S 36 34.6431 50 0.8 58
IV.TERO.HHZ. 2021-10-02T03:01:20.82 0.3 undecidable manual S 111 34.4433 50 -0.5 66
IV.MNTT.EHZ. 2021-10-02T03:01:19.36 3.0 positive manual P 0.68 0
IV.CAMP.HHZ. 2021-10-02T03:01:19.12 0.6 undecidable manual S 144 27.3504 50 -0.32 46
IV.GAVE.EHZ. 2021-10-02T03:01:19.01 0.3 undecidable manual S 260 26.1516 50 -0.1 73
IV.OFFI.HHZ. 2021-10-02T03:01:18.14 0.6 negative manual P 60 44.622 50 0.27 45
IV.RM33.EHZ. 2021-10-02T03:01:18.67 0.6 undecidable manual S 179 25.0527 112 -0.13 48
IV.MC2.EHZ. 2021-10-02T03:01:17.31 0.3 undecidable manual S 355 19.6692 117 0.2 72
IV.GUMA.HHZ. 2021-10-02T03:01:17.09 3.0 negative manual P 0.14 0
IV.LNSS.HHZ. 2021-10-02T03:01:17.36 0.6 undecidable manual S 223 20.1687 117 0.11 49
IV.ARRO.EHZ. 2021-10-02T03:01:17.25 3.0 negative manual P -0.1 0
IV.MMO1.EHZ. 2021-10-02T03:01:17.20 0.3 undecidable manual S 27 20.5683 116 -0.19 72
IV.MF5.EHZ. 2021-10-02T03:01:16.55 0.6 undecidable manual P 36 34.6431 50 0.22 47
IV.TERO.HHZ. 2021-10-02T03:01:16.03 0.3 undecidable manual P 111 34.4433 50 -0.27 69
IV.CESI.HHZ. 2021-10-02T03:01:16.91 3.0 undecidable manual P -0.2 0
IV.FDMO.HHZ. 2021-10-02T03:01:16.24 3.0 positive manual P -0.21 0
IV.CAMP.HHZ. 2021-10-02T03:01:15.53 0.6 undecidable manual P 144 27.3504 50 0.32 46
IV.MTRA.EHZ. 2021-10-02T03:01:15.47 0.3 undecidable manual S 81 15.3735 123 -0.35 70
IV.SMA1.EHZ. 2021-10-02T03:01:15.92 0.3 undecidable manual S 139 15.4734 123 0.09 74
IV.T1299.HNZ. 2021-10-02T03:01:15.39 0.3 undecidable manual S 152 12.5763 129 0.35 71
IV.RM33.EHZ. 2021-10-02T03:01:14.78 0.6 undecidable manual P 179 25.0527 112 -0.07 49
IV.NRCA.HHZ. 2021-10-02T03:01:14.95 0.3 undecidable manual S 325 13.4754 127 -0.32 71
IV.GAVE.EHZ. 2021-10-02T03:01:14.91 0.3 undecidable manual P 260 26.1516 50 -0.12 73
IV.LNSS.HHZ. 2021-10-02T03:01:14.00 0.1 positive manual P 223 20.1687 117 0.05 99
IV.SMA1.EHZ. 2021-10-02T03:01:13.25 0.6 negative manual P 139 15.4734 123 0.12 49
IV.MMO1.EHZ. 2021-10-02T03:01:13.82 0.6 positive manual P 27 20.5683 116 -0.21 48
IV.MC2.EHZ. 2021-10-02T03:01:13.99 0.6 positive manual P 355 19.6692 117 0.12 49
IV.MTRA.EHZ. 2021-10-02T03:01:13.08 0.1 negative manual P 81 15.3735 123 -0.04 100
IV.T1299.HNZ. 2021-10-02T03:01:12.93 0.1 undecidable manual P 152 12.5763 129 0.26 96
IV.NRCA.HHZ. 2021-10-02T03:01:12.70 0.1 positive manual P 325 13.4754 127 -0.1 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.5 0.0003345 0.08 AML other m 2021-10-02T03:01:15.16
IV.NRCA.HHN. ML:1.4 0.00026849999999999997 0.58 AML other m 2021-10-02T03:01:15.49
IV.MTRA.EHN. ML:1.2 0.000141 0.72 AML other m 2021-10-02T03:01:15.86
IV.MTRA.EHE. ML:1.2 0.00015050000000000003 0.3 AML other m 2021-10-02T03:01:16.51
IV.SMA1.EHE. ML:0.8 0.0000651 1.4 AML other m 2021-10-02T03:01:17.26
IV.LNSS.HHN. ML:1.4 0.00016800000000000002 0.14 AML other m 2021-10-02T03:01:17.72
IV.LNSS.HHE. ML:1.3 0.0001615 0.12 AML other m 2021-10-02T03:01:17.68
IV.SMA1.EHN. ML:0.8 0.00006445000000000001 1 AML other m 2021-10-02T03:01:18.44
IV.RM33.EHN. ML:1.0 0.0000646 0.28 AML other m 2021-10-02T03:01:19.21
IV.RM33.EHE. ML:1.2 0.00008444999999999999 0.48 AML other m 2021-10-02T03:01:19.16
IV.GAVE.EHE. ML:1.4 0.00013450000000000002 0.24 AML other m 2021-10-02T03:01:19.31
IV.GAVE.EHN. ML:1.2 0.0000986 0.7 AML other m 2021-10-02T03:01:19.28
IV.FDMO.HHN. ML:0.8 0.0000237 0.2 AML other m 2021-10-02T03:01:22.65
IV.CESI.HHE. ML:1.0 0.0000339 0.62 AML other m 2021-10-02T03:01:22.98
IV.GUMA.HHE. ML:1.9 0.0003 0.44 AML other m 2021-10-02T03:01:23.50
IV.CESI.HHN. ML:1.2 0.000050950000000000005 0.78 AML other m 2021-10-02T03:01:23.96
IV.GUMA.HHN. ML:1.8 0.00020600000000000002 1.72 AML other m 2021-10-02T03:01:23.94
IV.FDMO.HHE. ML:0.7 0.000019950000000000004 0.48 AML other m 2021-10-02T03:01:24.12
IV.ARRO.EHE. ML:0.8 0.000019299999999999998 0.26 AML other m 2021-10-02T03:01:24.46
IV.ARRO.EHN. ML:0.8 0.000020850000000000002 1.42 AML other m 2021-10-02T03:01:27.98
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