Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 22-11-2021 and time 19:05:40 (Italy) in region 4 km W Amatrice (RI)

A magnitude ML 0.6 earthquake occured in region: 4 km W Amatrice (RI), on

  • 22-11-2021 18:05:40 (UTC)
  • 22-11-2021 19:05:40 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6380, 13.2460 at 14 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 4 2657 2657
Accumoli RI 6 667 3324
Cittareale RI 7 482 3806
Montereale AQ 13 2581 6387
Campotosto AQ 14 542 6929
Capitignano AQ 14 665 7594
Arquata del Tronto AP 16 1178 8772
Borbona RI 17 617 9389
Posta RI 18 694 10083
Cagnano Amiterno AQ 20 1369 11452
Acquasanta Terme AP 20 2916 14368

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NW of L'Aquila (69753 inhabitants)
38 Km W of Teramo (54892 inhabitants)
50 Km E of Terni (111501 inhabitants)
57 Km SE of Foligno (57155 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
82 Km W of Pescara (121014 inhabitants)
82 Km W of Chieti (51815 inhabitants)
83 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km NE of Tivoli (56533 inhabitants)
87 Km SE of Perugia (166134 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 0.6 2021-11-22
18:05:40		 42.6378 13.2458 14 2021-11-22
18:29:34		 Sala Sismica INGV-Roma 97695831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-22 18:05:40 ± 0.09
Latitude 42.6378 ± 0.0036
Longitude 13.2458 ± 0.0061
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97695831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 409
Semi-minor axis of confidence ellipse (meter) 276
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 302
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) 94
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.26350
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 97695831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-22 18:29:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PZUN.HHZ. 2021-11-22T18:07:07.75 3.0 undecidable manual Sg 5.26 0
IV.TDS.HHZ. 2021-11-22T18:06:51.03 3.0 undecidable manual Pg 9.89 0
IV.MILZ.HHZ. 2021-11-22T18:06:51.82 3.0 undecidable manual Pn -0.68 0
IV.FIR.HHZ. 2021-11-22T18:06:44.66 3.0 undecidable manual Sg 3.37 0
IV.POFI.HHZ. 2021-11-22T18:06:14.27 3.0 undecidable manual Sn -2.84 0
IV.RMP.HHZ. 2021-11-22T18:06:00.75 3.0 negative manual Pg 0.24 0
IV.TERO.HHZ. 2021-11-22T18:05:50.77 0.3 undecidable manual S 93 29.2485 99 -0.22 93
IV.NRCA.HHZ. 2021-11-22T18:05:49.47 0.3 undecidable manual S 334 24.2535 102 -0.19 94
IV.MTRA.HNZ. 2021-11-22T18:05:47.92 0.3 undecidable manual S 43 18.0708 111 -0.15 96
IV.LNSS.HHZ. 2021-11-22T18:05:47.85 0.3 undecidable manual S 257 17.1717 113 -0.02 99
IV.TERO.HHZ. 2021-11-22T18:05:46.75 0.3 undecidable manual P 93 29.2485 99 0.13 95
IV.RM33.EHZ. 2021-11-22T18:05:46.98 0.3 undecidable manual S 190 14.4744 119 -0.24 95
IV.NRCA.HHZ. 2021-11-22T18:05:45.97 0.3 undecidable manual P 334 24.2535 102 0.12 96
IV.SMA1.EHZ. 2021-11-22T18:05:45.81 0.3 undecidable manual S 96 7.3815 144 0.02 100
IV.MTRA.HNZ. 2021-11-22T18:05:45.06 0.3 undecidable manual P 43 18.0708 111 0.12 97
IV.RM33.EHZ. 2021-11-22T18:05:44.53 0.3 undecidable manual P 190 14.4744 119 0.08 98
IV.LNSS.HHZ. 2021-11-22T18:05:44.89 0.3 undecidable manual P 257 17.1717 113 0.07 98
IV.SMA1.EHZ. 2021-11-22T18:05:43.88 0.3 undecidable manual P 96 7.3815 144 0.26 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:0.6 0.000024266855499999998 0.1152 AML other m 2021-11-22T18:05:49.70
IV.NRCA.HHN. ML:0.8 0.000033350000000000004 0.14 AML other m 2021-11-22T18:05:49.70
IV.RM33.EHE. ML:0.6 0.000031245200000000004 0.1536 AML other m 2021-11-22T18:05:48.54
IV.RM33.EHN. ML:0.6 0.000035445945 0.128 AML other m 2021-11-22T18:05:47.28
IV.LNSS.HHE. ML:0.4 0.000020300609999999997 0.128 AML other m 2021-11-22T18:05:48.93
IV.LNSS.HHN. ML:0.4 0.000020185361 0.1408 AML other m 2021-11-22T18:05:49.36
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