Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 29-10-2021 and time 22:40:25 (UTC) in region 3 km S Amatrice (RI)

A magnitude ML 0.6 earthquake occured in region: 3 km S Amatrice (RI), on

  • 29-10-2021 22:40:25 (UTC)
  • 30-10-2021 00:40:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6050, 13.2980 at 9 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
Amatrice RI 3 2657 2657
Campotosto AQ 8 542 3199
Capitignano AQ 9 665 3864
Montereale AQ 10 2581 6445
Accumoli RI 11 667 7112
Cittareale RI 11 482 7594
Crognaleto TE 16 1297 8891
Borbona RI 17 617 9508
Barete AQ 17 737 10245
Cagnano Amiterno AQ 17 1369 11614
Cortino TE 17 656 12270
Pizzoli AQ 19 4326 16596
Posta RI 19 694 17290
Arquata del Tronto AP 19 1178 18468

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km N of L'Aquila (69753 inhabitants)
34 Km W of Teramo (54892 inhabitants)
53 Km E of Terni (111501 inhabitants)
62 Km SE of Foligno (57155 inhabitants)
71 Km W of Montesilvano (53738 inhabitants)
77 Km W of Pescara (121014 inhabitants)
77 Km W of Chieti (51815 inhabitants)
82 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km NE of Tivoli (56533 inhabitants)
93 Km SE of Perugia (166134 inhabitants)
100 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 0.6 2021-10-29
22:40:25		 42.6047 13.2977 9 2021-10-29
22:44:53		 Sala Sismica INGV-Roma 97074721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-29 22:40:25 ± 0.12
Latitude 42.6047 ± 0.0036
Longitude 13.2977 ± 0.0037
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97074721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 414
Semi-minor axis of confidence ellipse (meter) 113
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 176
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 83
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.03148
Epicentral distance of station farthest from the epicenter (degree) 0.26530
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 97074721
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-29 22:44:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NRCA.HHZ. 2021-10-29T22:40:35.60 0.3 undecidable manual S 330 29.4483 106 -0.13 71
IV.TERO.HHZ. 2021-10-29T22:40:34.08 0.1 undecidable manual S 85 25.0527 109 -0.21 94
IV.LNSS.HHZ. 2021-10-29T22:40:33.10 0.1 undecidable manual S 270 21.0678 112 0.13 96
IV.NRCA.HHZ. 2021-10-29T22:40:31.14 0.6 negative manual P 330 29.4483 106 -0.09 48
IV.TERO.HHZ. 2021-10-29T22:40:30.43 0.3 undecidable manual P 85 25.0527 109 0.04 73
IV.RM33.EHZ. 2021-10-29T22:40:30.18 0.3 undecidable manual S 213 12.5763 125 -0.21 72
IV.LNSS.HHZ. 2021-10-29T22:40:29.61 0.6 negative manual P 270 21.0678 112 -0.02 49
IV.RM33.EHZ. 2021-10-29T22:40:28.11 0.1 undecidable manual P 213 12.5763 125 -0.03 99
IV.CAMP.HHE. 2021-10-29T22:40:28.17 0.3 undecidable manual P 130 11.877 126 0.15 73
IV.T1299.EHZ. 2021-10-29T22:40:28.12 0.1 undecidable manual S 339 3.4965 158 -0.21 97
IV.SMA1.EHZ. 2021-10-29T22:40:28.55 0.1 undecidable manual S 47 4.1958 154 0.13 99
IV.SMA1.EHZ. 2021-10-29T22:40:27.30 0.1 undecidable manual P 47 4.1958 154 0.29 96
IV.T1299.EHZ. 2021-10-29T22:40:27.03 0.1 undecidable manual P 339 3.4965 158 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.2 0.00029000000000000006 0.34 AML other m 2021-10-29T22:40:28.99
IV.SMA1.EHN. ML:1.4 0.000451 0.62 AML other m 2021-10-29T22:40:28.89
IV.RM33.EHN. ML:0.8 0.00007274999999999999 1.02 AML other m 2021-10-29T22:40:30.34
IV.RM33.EHE. ML:0.7 0.0000605 0.24 AML other m 2021-10-29T22:40:31.80
IV.LNSS.HHE. ML:0.4 0.000021400000000000002 0.12 AML other m 2021-10-29T22:40:33.67
IV.LNSS.HHN. ML:0.4 0.00002135 0.5 AML other m 2021-10-29T22:40:33.51
IV.NRCA.HHE. ML:0.7 0.00002265 0.12 AML other m 2021-10-29T22:40:36.55
IV.NRCA.HHN. ML:0.6 0.0000204 1.08 AML other m 2021-10-29T22:40:36.76
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