Earthquake with magnitude of ML 1.0 on date 22-10-2021 and time 05:18:41 (UTC) in region 9 km W Accumoli (RI)

A magnitude ML 1.0 earthquake occured in region: 9 km W Accumoli (RI), on

  • 22-10-2021 05:18:41 (UTC)
  • 22-10-2021 07:18:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.702, 13.133 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.

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 10 667 667
Cittareale RI 10 482 1149
Cascia PG 10 3217 4366
Norcia PG 11 4957 9323
Amatrice RI 15 2657 11980
Monteleone di Spoleto PG 16 599 12579
Arquata del Tronto AP 16 1178 13757
Poggiodomo PG 16 117 13874
Posta RI 20 694 14568

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Terni (111501 inhabitants)
45 Km NW of L'Aquila (69753 inhabitants)
45 Km SE of Foligno (57155 inhabitants)
47 Km W of Teramo (54892 inhabitants)
76 Km SE of Perugia (166134 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
92 Km W of Pescara (121014 inhabitants)
93 Km W of Chieti (51815 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.0 2021-10-22
05:18:41
42.7015 13.1328 10 2021-10-22
05:25:11
Sala Sismica INGV-Roma 96867471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-22 05:18:41 ± 0.07
Latitude 42.7015 ± 0.0045
Longitude 13.1328 ± 0.0049
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96867471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 410
Semi-minor axis of confidence ellipse (meter) 389
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 307
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.42538
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 96867471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-22 05:25:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
HL.VLS.HHZ. 2021-10-22T05:20:14.75 3.0 negative manual Pn -2.85 0
IV.VOBA.EHZ. 2021-10-22T05:20:11.51 3.0 undecidable manual Sn 2.78 0
IV.CTI.HHZ. 2021-10-22T05:20:09.63 3.0 undecidable manual Sn 2.2 0
IV.ZEN8.EHZ. 2021-10-22T05:20:00.28 3.0 undecidable manual Sn -6.01 0
IV.MNTV.EHZ. 2021-10-22T05:19:55.16 3.0 undecidable manual Sn -1.09 0
IX.SCL3.EHZ.02 2021-10-22T05:19:47.49 3.0 undecidable manual Sg 1.03 0
SI.ROSI.HHZ. 2021-10-22T05:19:42.90 3.0 negative manual Pn 3.62 0
IV.SGO.HHZ. 2021-10-22T05:19:41.45 3.0 undecidable manual Sn -5.69 0
CR.STON.BHZ. 2021-10-22T05:19:32.54 3.0 undecidable manual Pg 10.22 0
IV.ZEN8.EHZ. 2021-10-22T05:19:28.99 3.0 negative manual Pn 2.44 0
NI.VINO.HHZ. 2021-10-22T05:19:22.54 3.0 positive manual Pn -4.09 0
IV.SCHR.EHZ. 2021-10-22T05:19:16.37 3.0 undecidable manual Pn -8.02 0
IV.NDIM.HHZ. 2021-10-22T05:19:12.39 3.0 positive manual Pn -5.13 0
IV.RMP.HHZ. 2021-10-22T05:19:09.00 3.0 undecidable manual Sn -1.52 0
IV.MOMA.HHZ. 2021-10-22T05:18:56.69 0.1 undecidable manual S 284 0.4254 50 0.4 87
IV.TERO.HHZ. 2021-10-22T05:18:53.79 0.3 undecidable manual S 103 0.3552 50 -0.42 66
IV.TST02.HHZ. 2021-10-22T05:18:51.25 3.0 undecidable manual P -3.15 0
IV.MOMA.HHZ. 2021-10-22T05:18:50.00 0.3 undecidable manual P 284 0.4254 50 0.15 69
IV.MMO1.EHZ. 2021-10-22T05:18:50.97 0.3 undecidable manual S 36 0.2437 50 0.06 73
IV.RM33.EHZ. 2021-10-22T05:18:49.44 0.1 undecidable manual S 163 0.2014 114 -0.13 96
IV.COR1.EHZ. 2021-10-22T05:18:49.41 3.0 undecidable manual P -2.16 0
IV.GAVE.EHZ. 2021-10-22T05:18:48.36 0.1 undecidable manual S 267 0.1754 118 -0.31 93
IV.TERO.HHZ. 2021-10-22T05:18:48.40 0.3 undecidable manual P 103 0.3552 50 -0.24 69
IV.SMA1.EHZ. 2021-10-22T05:18:48.97 0.3 undecidable manual S 115 0.1646 119 0.66 63
IV.NRCA.HHZ. 2021-10-22T05:18:47.17 0.1 undecidable manual S 354 0.1322 125 -0.08 99
IV.LNSS.HHZ. 2021-10-22T05:18:46.90 0.1 undecidable manual S 215 0.1196 127 0.05 100
IV.MMO1.EHZ. 2021-10-22T05:18:46.67 0.1 undecidable manual P 36 0.2437 50 -0.06 97
IV.GAVE.EHZ. 2021-10-22T05:18:45.32 0.3 negative manual P 267 0.1754 118 -0.12 73
IV.RM33.EHZ. 2021-10-22T05:18:45.85 0.6 undecidable manual P 163 0.2014 114 -0.12 48
IV.SMA1.EHZ. 2021-10-22T05:18:45.56 1.0 negative manual P 115 0.1646 119 0.33 23
IV.PP3.EHZ. 2021-10-22T05:18:45.68 3.0 negative manual P -1.77 0
IV.NRCA.HHZ. 2021-10-22T05:18:44.64 0.1 positive manual P 354 0.1322 125 0.02 100
IV.LNSS.HHZ. 2021-10-22T05:18:44.49 0.1 negative manual P 215 0.1196 127 0.1 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1 0.00010555 0.16 AML other m 2021-10-22T05:18:47.26
IV.LNSS.HHN. ML:0.9 8.955E-5 0.66 AML other m 2021-10-22T05:18:47.48
IV.LNSS.HHE. ML:0.9 7.92E-5 0.78 AML other m 2021-10-22T05:18:47.11
IV.GAVE.EHN. ML:1.1 9.535E-5 0.24 AML other m 2021-10-22T05:18:48.56
IV.NRCA.HHN. ML:0.9 6.925E-5 0.1 AML other m 2021-10-22T05:18:48.64
IV.SMA1.EHE. ML:1 7.6E-5 0.86 AML other m 2021-10-22T05:18:49.24
IV.SMA1.EHN. ML:0.9 7.065E-5 0.4 AML other m 2021-10-22T05:18:49.30
IV.GAVE.EHE. ML:1 7.66E-5 0.62 AML other m 2021-10-22T05:18:49.08
IV.CTI.HHN. ML:3.4 0.000168 1.3 AML other m 2021-10-22T05:20:08.92
IV.CTI.HHE. ML:3.4 0.00016 1.38 AML other m 2021-10-22T05:20:13.85
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