Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 20-06-2020 and time 21:08:23 (Italy) in region 4 km W Amatrice (RI)

A magnitude ML 1.1 earthquake occured in region: 4 km W Amatrice (RI), on

  • 20-06-2020 19:08:23 (UTC)
  • 20-06-2020 21:08:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6300, 13.2410 at 12 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
Cittareale RI 7 482 3139
Accumoli RI 7 667 3806
Montereale AQ 12 2581 6387
Capitignano AQ 13 665 7052
Campotosto AQ 13 542 7594
Borbona RI 16 617 8211
Arquata del Tronto AP 17 1178 9389
Posta RI 17 694 10083
Cagnano Amiterno AQ 19 1369 11452

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)
49 Km E of Terni (111501 inhabitants)
57 Km SE of Foligno (57155 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
82 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km W of Pescara (121014 inhabitants)
82 Km W of Chieti (51815 inhabitants)
83 Km NE of Tivoli (56533 inhabitants)
87 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 1.1 2020-06-20
19:08:23		 42.6305 13.2407 12 2020-06-20
19:18:55		 Sala Sismica INGV-Roma 80353681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-06-20 19:08:23 ± 0.06
Latitude 42.6305 ± 0.0045
Longitude 13.2407 ± 0.0049
Depth (km) 12 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 80353681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 453
Semi-minor axis of confidence ellipse (meter) 429
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 164
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.03058
Epicentral distance of station farthest from the epicenter (degree) 0.46225
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 19
Type of magnitude ML
Reference to an origin 80353681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-06-20 19:18:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2020-06-20T19:08:34.41 0.6 undecidable manual S 13 30.6471 91 0.08 48
IV.TERO.HHZ. 2020-06-20T19:08:33.67 0.6 undecidable manual S 92 29.6481 91 -0.4 45
IV.CSP1.EHZ. 2020-06-20T19:08:33.39 1.0 undecidable manual P 357 51.3153 91 0.38 22
IV.NRCA.HHZ. 2020-06-20T19:08:32.35 0.6 undecidable manual S 335 24.753 92 -0.41 46
IV.MF5.EHZ. 2020-06-20T19:08:32.41 0.6 negative manual P 24 43.4232 91 0.59 41
IV.ARRO.EHZ. 2020-06-20T19:08:31.07 1.0 negative manual P 262 39.2274 91 -0.09 24
IV.LNSS.HHZ. 2020-06-20T19:08:30.49 0.6 undecidable manual S 259 16.6722 96 -0.11 49
IV.MTRA.EHZ. 2020-06-20T19:08:30.81 0.6 undecidable manual S 42 18.87 94 -0.39 46
IV.CAMP.HHZ. 2020-06-20T19:08:30.60 0.6 undecidable manual S 127 17.2716 95 -0.17 48
IV.RM33.EHZ. 2020-06-20T19:08:29.72 0.6 undecidable manual S 189 13.6752 105 -0.09 50
IV.TERO.HHZ. 2020-06-20T19:08:29.59 0.3 undecidable manual P 92 29.6481 91 -0.09 72
IV.MMO1.EHZ. 2020-06-20T19:08:29.81 0.6 undecidable manual P 13 30.6471 91 -0.02 49
IV.SMA1.EHZ. 2020-06-20T19:08:28.64 0.6 undecidable manual S 90 7.6812 134 0.19 48
IV.NRCA.HHZ. 2020-06-20T19:08:28.77 0.1 negative manual P 335 24.753 92 -0.16 96
IV.MTRA.EHZ. 2020-06-20T19:08:27.81 1.0 undecidable manual P 42 18.87 94 -0.22 24
IV.CAMP.HHZ. 2020-06-20T19:08:27.91 0.1 undecidable manual P 127 17.2716 95 0.12 98
IV.RM33.EHZ. 2020-06-20T19:08:27.29 0.6 positive manual P 189 13.6752 105 0.06 50
IV.T1299.HNZ. 2020-06-20T19:08:27.44 0.6 undecidable manual S 83 3.3966 158 -0.38 49
IV.LNSS.HHZ. 2020-06-20T19:08:27.67 0.1 positive manual P 259 16.6722 96 -0.01 100
IV.T1299.HNZ. 2020-06-20T19:08:26.08 0.3 undecidable manual P 83 3.3966 158 0 76
IV.SMA1.EHZ. 2020-06-20T19:08:26.64 0.1 positive manual P 90 7.6812 134 0.2 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.HNE. ML:1.0 0.00010202875 0.7168 AML other m 2020-06-20T19:08:33.93
IV.RM33.HNN. ML:0.9 0.000080794945 0.5632 AML other m 2020-06-20T19:08:33.40
IV.RM33.EHE. ML:0.9 0.000083039075 0.128 AML other m 2020-06-20T19:08:30.20
IV.RM33.EHN. ML:0.8 0.000060499770000000004 0.128 AML other m 2020-06-20T19:08:30.68
IV.LNSS.HNN. ML:1.2 0.0001269191 0.3328 AML other m 2020-06-20T19:08:32.14
IV.LNSS.HHE. ML:0.9 0.00006969992 0.1024 AML other m 2020-06-20T19:08:31.69
IV.LNSS.HHN. ML:0.9 0.00005773214 0.1664 AML other m 2020-06-20T19:08:30.99
IV.MTRA.HNE. ML:1.2 0.00010697453500000001 0.3456 AML other m 2020-06-20T19:08:34.66
IV.MTRA.HNN. ML:1.2 0.00010373858 0.2176 AML other m 2020-06-20T19:08:31.22
IV.MTRA.EHE. ML:0.9 0.000066200005 0.2176 AML other m 2020-06-20T19:08:31.83
IV.MTRA.EHN. ML:1.1 0.00008679207 0.2176 AML other m 2020-06-20T19:08:31.12
IV.NRCA.HNE. ML:1.3 0.00012065815499999999 0.7936 AML other m 2020-06-20T19:08:40.36
IV.NRCA.HNN. ML:1.3 0.000119449 0.448 AML other m 2020-06-20T19:08:35.39
IV.NRCA.HHE. ML:1.3 0.00011348977500000002 0.1152 AML other m 2020-06-20T19:08:32.93
IV.NRCA.HHN. ML:1.3 0.00010703462499999999 0.1152 AML other m 2020-06-20T19:08:32.51
IV.TERO.HHE. ML:0.9 0.000040658230000000005 0.1408 AML other m 2020-06-20T19:08:33.95
IV.TERO.HHN. ML:0.9 0.000033947505 0.1152 AML other m 2020-06-20T19:08:33.95
IV.TERO.HNE. ML:1.2 0.00008495609 0.4736 AML other m 2020-06-20T19:08:38.59
IV.TERO.HNN. ML:1.4 0.0001296681 0.6912 AML other m 2020-06-20T19:08:39.99
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