Earthquake with magnitude of ML 1.2 on date 20-10-2021 and time 06:28:12 (UTC) in region 5 km NW Amatrice (RI)

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

  • 20-10-2021 06:28:12 (UTC)
  • 20-10-2021 08:28:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6520, 13.2380 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.

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 5 2657 2657
Accumoli RI 5 667 3324
Cittareale RI 7 482 3806
Montereale AQ 14 2581 6387
Arquata del Tronto AP 14 1178 7565
Campotosto AQ 15 542 8107
Capitignano AQ 16 665 8772
Borbona RI 18 617 9389
Posta RI 18 694 10083
Acquasanta Terme AP 19 2916 12999
Norcia PG 20 4957 17956
Cascia PG 20 3217 21173

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km NW of L'Aquila (69753 inhabitants)
38 Km W of Teramo (54892 inhabitants)
49 Km E of Terni (111501 inhabitants)
55 Km SE of Foligno (57155 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
83 Km W of Pescara (121014 inhabitants)
83 Km W of Chieti (51815 inhabitants)
84 Km NE of Guidonia Montecelio (88673 inhabitants)
85 Km NE of Tivoli (56533 inhabitants)
86 Km SE of Perugia (166134 inhabitants)
96 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 2021-10-20
06:28:12
42.6523 13.2383 14 2021-10-20
06:35:11
Sala Sismica INGV-Roma 96789951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 06:28:12 ± 0.2
Latitude 42.6523 ± 0.0081
Longitude 13.2383 ± 0.0061
Depth (km) 14 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96789951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 844
Semi-minor axis of confidence ellipse (meter) 243
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 173
Circular confidence region, given by single value of horizontal uncertainty (meter) 840.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.48563
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 96789951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 06:35:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ALJA.HHZ. 2021-10-20T06:30:09.48 3.0 undecidable manual Sn -9.99 0
IV.MNTV.EHZ. 2021-10-20T06:29:52.66 3.0 undecidable manual Sg 8.46 0
HL.VLS.HHZ. 2021-10-20T06:29:51.40 3.0 undecidable manual Pn -2.35 0
IV.ZEN8.EHZ. 2021-10-20T06:29:51.10 3.0 undecidable manual Sn -3.41 0
GU.GRAM.HHZ. 2021-10-20T06:29:50.96 3.0 undecidable manual Sg 9.22 0
IV.CADC.EHZ. 2021-10-20T06:29:49.32 3.0 undecidable manual Sn -7.87 0
IV.SENA.HHZ. 2021-10-20T06:29:49.32 3.0 undecidable manual Sn -4.42 0
GU.FIVI.HNZ. 2021-10-20T06:29:39.02 3.0 undecidable manual Sg 1.75 0
IV.RAFF.HHZ. 2021-10-20T06:29:34.21 3.0 undecidable manual Pn 2.78 0
SI.ROSI.HHZ. 2021-10-20T06:29:29.58 3.0 negative manual Pg 7.48 0
IV.ERC.EHZ. 2021-10-20T06:29:28.99 3.0 negative manual Pg 8.61 0
IV.SELL.HHZ. 2021-10-20T06:29:27.43 3.0 negative manual Pg 10.64 0
IV.MTMR.EHZ. 2021-10-20T06:29:19.09 3.0 undecidable manual Sg 6.97 0
IV.SARZ.HNZ. 2021-10-20T06:29:17.01 3.0 undecidable manual Pn 2.98 0
IV.FIR.HHZ. 2021-10-20T06:29:13.24 3.0 undecidable manual Sg -1.23 0
OT.OT14.EHZ. 2021-10-20T06:29:07.83 3.0 undecidable manual Sn -2.96 0
IV.VENL.EHZ. 2021-10-20T06:29:04.95 3.0 negative manual Pg 5.41 0
IV.RAVA.EHZ. 2021-10-20T06:29:03.91 3.0 positive manual Pg 6.93 0
IT.FIE.HGZ. 2021-10-20T06:29:02.72 3.0 undecidable manual Sn -9.99 0
OT.OT17.EHZ. 2021-10-20T06:29:02.36 3.0 undecidable manual Sn -1.72 0
MN.TRI.HHZ. 2021-10-20T06:28:56.57 3.0 negative manual Pn -5.6 0
IV.RNI2.HHZ. 2021-10-20T06:28:44.44 3.0 undecidable manual S -1.59 0
IV.PE3.EHZ. 2021-10-20T06:28:32.13 3.0 undecidable manual P -5.11 0
IV.ARVD.HHZ. 2021-10-20T06:28:29.98 3.0 positive manual P -2.49 0
IV.TERO.HHZ. 2021-10-20T06:28:23.00 0.6 undecidable manual S 96 30.0477 100 -0.01 50
IV.GAVE.EHZ. 2021-10-20T06:28:22.40 0.6 undecidable manual S 279 28.4493 101 -0.2 47
IV.MNTT.EHZ. 2021-10-20T06:28:21.77 0.3 negative manual P 32 53.9016 94 -0.46 65
IV.LNSS.HHZ. 2021-10-20T06:28:19.60 0.6 undecidable manual S 251 17.0718 115 -0.1 49
IV.RM33.EHZ. 2021-10-20T06:28:19.20 0.3 undecidable manual S 187 16.0728 117 -0.25 71
IV.TERO.HHZ. 2021-10-20T06:28:18.64 1.0 undecidable manual P 96 30.0477 100 0.08 24
IV.GAVE.EHZ. 2021-10-20T06:28:18.60 1.0 negative manual P 279 28.4493 101 0.28 24
IV.SMA1.EHZ. 2021-10-20T06:28:17.70 0.6 undecidable manual S 107 8.2806 142 -0.14 50
IV.RM33.EHZ. 2021-10-20T06:28:16.65 0.1 undecidable manual P 187 16.0728 117 0.15 100
IV.LNSS.HHZ. 2021-10-20T06:28:16.86 0.1 positive manual P 251 17.0718 115 0.21 98
IV.SMA1.EHZ. 2021-10-20T06:28:15.84 0.1 negative manual P 107 8.2806 142 0.26 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.4 0.00027100000000000003 0.28 AML other m 2021-10-20T06:28:18.23
IV.SMA1.EHN. ML:1.0 0.00009900000000000001 0.44 AML other m 2021-10-20T06:28:18.77
IV.LNSS.HHN. ML:0.9 0.00005935 0.42 AML other m 2021-10-20T06:28:19.73
IV.LNSS.HHE. ML:0.9 0.0000655 0.14 AML other m 2021-10-20T06:28:19.77
IV.MNTT.EHN. ML:2.1 0.00028050000000000004 0.42 AML other m 2021-10-20T06:28:30.59
IV.MNTT.EHE. ML:2.3 0.000468 0.5 AML other m 2021-10-20T06:28:30.30
IV.GAVE.EHE. ML:1.1 0.00005465000000000001 0.2 AML other m 2021-10-20T06:28:36.81
IV.GAVE.EHN. ML:1.1 0.000060899999999999996 0.52 AML other m 2021-10-20T06:28:36.64
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