Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 02-11-2021 and time 14:56:31 (UTC) in region 8 km W Accumoli (RI)

A magnitude ML 1.0 earthquake occured in region: 8 km W Accumoli (RI), on

  • 02-11-2021 14:56:31 (UTC)
  • 02-11-2021 15:56:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7010, 13.1530 at 15 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
Cittareale RI 9 482 1149
Norcia PG 11 4957 6106
Cascia PG 12 3217 9323
Amatrice RI 14 2657 11980
Arquata del Tronto AP 14 1178 13158
Monteleone di Spoleto PG 17 599 13757
Poggiodomo PG 18 117 13874

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km NW of L'Aquila (69753 inhabitants)
44 Km E of Terni (111501 inhabitants)
45 Km W of Teramo (54892 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
87 Km NE of Tivoli (56533 inhabitants)
91 Km W of Pescara (121014 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
92 Km W of Chieti (51815 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 1.0 2021-11-02
14:56:31		 42.7012 13.1527 15 2022-03-30
13:04:38		 Bollettino Sismico Italiano INGV 101079221
Reviewed
Rev100 		ML 1.1 2021-11-02
14:56:30		 42.7222 13.1848 19 2021-11-02
15:07:55		 Sala Sismica INGV-Roma 97171361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-02 14:56:31 ± 0.08
Latitude 42.7012 ± 0.0027
Longitude 13.1527 ± 0.0037
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 101079221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 325
Semi-minor axis of confidence ellipse (meter) 199
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 7
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) 130
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.19785
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 101079221
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-17 11:15:18

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 97171361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-02 15:07:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CADC.EHZ. 2021-11-02T14:57:50.28 3.0 undecidable manual Sn 6.5 0
IX.SCL3.EHZ.02 2021-11-02T14:57:42.26 3.0 undecidable manual Sg 14.11 0
IV.HMDC.HHZ. 2021-11-02T14:57:42.44 3.0 undecidable manual Pn 1.83 0
GU.GORR.HHZ. 2021-11-02T14:57:42.40 3.0 undecidable manual Sn -0.79 0
IV.VOBA.EHZ. 2021-11-02T14:57:41.52 3.0 undecidable manual Sn -1.37 0
IV.EFIU.HHZ. 2021-11-02T14:57:30.05 3.0 negative manual Pn -0.41 0
IX.SRN3.HHZ.02 2021-11-02T14:57:24.76 3.0 undecidable manual Sn -7.11 0
IV.LADO.EHZ. 2021-11-02T14:57:19.41 3.0 undecidable manual Pn -0.27 0
IX.RSF3.HHZ.02 2021-11-02T14:57:15.13 3.0 undecidable manual Sn -4.26 0
IV.FIU.EHZ. 2021-11-02T14:57:12.41 3.0 undecidable manual Sn -1.14 0
IV.PAOL.HHZ. 2021-11-02T14:57:05.09 3.0 undecidable manual Sn -7.64 0
IV.IMOL.HNZ. 2021-11-02T14:57:05.30 3.0 undecidable manual Sn -0.44 0
FR.AJAC.HHZ.00 2021-11-02T14:57:05.28 3.0 negative manual Pn -0.99 0
IX.RSF3.HHZ.02 2021-11-02T14:56:59.45 3.0 undecidable manual Pg 9.23 0
IV.LPEL.HHZ. 2021-11-02T14:56:57.41 3.0 undecidable manual Sg 8.69 0
IV.CRND.HNZ. 2021-11-02T14:56:54.72 3.0 positive manual Pn -3.89 0
IV.COLB.HHZ. 2021-11-02T14:56:54.35 3.0 undecidable manual Pg 6.56 0
IV.VITU.HHZ. 2021-11-02T14:56:49.23 3.0 undecidable manual Pg 4.32 0
IV.COR1.EHZ. 2021-11-02T14:56:47.77 3.0 undecidable manual Sg 6.9 0
IV.RIBO.EHZ.01 2021-11-02T14:56:45.46 3.0 undecidable manual Pg 4.29 0
IV.VBKN.HHZ. 2021-11-02T14:56:43.61 3.0 negative manual Pn -4.87 0
IV.RM33.EHZ. 2021-11-02T14:56:40.27 0.3 undecidable manual S 167 21.9669 110 -0.07 75
IV.GAVE.EHZ. 2021-11-02T14:56:40.21 0.3 undecidable manual S 267 21.0678 112 0.07 74
IV.SMA1.EHZ. 2021-11-02T14:56:39.11 0.3 undecidable manual S 118 16.872 119 0 76
IV.FOSV.EHZ. 2021-11-02T14:56:39.40 3.0 undecidable manual Sn 1.29 0
IV.FIR.HHZ. 2021-11-02T14:56:38.00 3.0 undecidable manual Pn -3.53 0
IV.NRCA.HHZ. 2021-11-02T14:56:38.57 0.3 undecidable manual S 348 14.9739 124 -0.12 75
IV.LNSS.HHZ. 2021-11-02T14:56:38.48 0.3 undecidable manual S 220 14.2746 126 -0.05 77
IV.RM33.EHZ. 2021-11-02T14:56:36.62 0.3 undecidable manual P 167 21.9669 110 -0.13 75
IV.GAVE.EHZ. 2021-11-02T14:56:36.65 0.1 undecidable manual P 267 21.0678 112 0.02 100
IV.SMA1.EHZ. 2021-11-02T14:56:36.21 0.1 undecidable manual P 118 16.872 119 0.17 98
IV.NRCA.HHZ. 2021-11-02T14:56:35.76 0.3 undecidable manual P 348 14.9739 124 -0.03 77
IV.LNSS.HHZ. 2021-11-02T14:56:35.70 0.3 undecidable manual P 220 14.2746 126 0 76
IV.LPEL.HHZ. 2021-11-02T14:56:32.54 3.0 positive manual P -0.45 0
IV.SRES.HHZ. 2021-11-02T14:56:29.96 3.0 positive manual P -1.75 0
IV.SSFR.HNZ. 2021-11-02T14:56:28.59 3.0 positive manual P 0.77 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HNE. ML:1.0 0.00007763118500000001 1.5616 AML other m 2021-11-02T14:56:38.93
IV.LNSS.HNN. ML:1.3 0.00014892495 0.8064 AML other m 2021-11-02T14:56:38.20
IV.LNSS.HHE. ML:0.9 0.0000673949 0.1408 AML other m 2021-11-02T14:56:38.76
IV.NRCA.HHN. ML:1.0 0.00007569308 0.6816 AML other m 2021-11-02T14:56:39.73
IV.RM33.HNN. ML:1.3 0.00011328075 1.28 AML other m 2021-11-02T14:56:40.88
IV.GAVE.EHN. ML:0.9 0.00004428327 0.96 AML other m 2021-11-02T14:56:40.92
IV.RM33.HNE. ML:1.0 0.0000616967 0.4352 AML other m 2021-11-02T14:56:40.51
IV.GAVE.EHE. ML:0.8 0.000034203285 1.28 AML other m 2021-11-02T14:56:40.31
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