Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 19-09-2021 and time 12:46:56 (UTC) in region 1 km NE Amatrice (RI)

A magnitude ML 1.4 earthquake occured in region: 1 km NE Amatrice (RI), on

  • 19-09-2021 12:46:56 (UTC)
  • 19-09-2021 14:46:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6400, 13.3020 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 2 2657 2657
Accumoli RI 8 667 3324
Campotosto AQ 11 542 3866
Cittareale RI 12 482 4348
Capitignano AQ 13 665 5013
Montereale AQ 14 2581 7594
Arquata del Tronto AP 15 1178 8772
Acquasanta Terme AP 17 2916 11688
Cortino TE 17 656 12344
Crognaleto TE 18 1297 13641
Rocca Santa Maria TE 19 537 14178
Valle Castellana TE 19 977 15155
Borbona RI 20 617 15772

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km N of L'Aquila (69753 inhabitants)
33 Km W of Teramo (54892 inhabitants)
54 Km E of Terni (111501 inhabitants)
60 Km SE of Foligno (57155 inhabitants)
71 Km W of Montesilvano (53738 inhabitants)
77 Km W of Pescara (121014 inhabitants)
78 Km W of Chieti (51815 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
91 Km SE of Perugia (166134 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 1.4 2021-09-19
12:46:56		 42.6398 13.3022 12 2021-09-19
12:52:26		 Sala Sismica INGV-Roma 95632611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-19 12:46:56 ± 0.06
Latitude 42.6398 ± 0.0036
Longitude 13.3022 ± 0.0049
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95632611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 408
Semi-minor axis of confidence ellipse (meter) 111
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 254
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) 63
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.36692
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 95632611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-19 12:52:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LAV9.HNZ. 2021-09-19T12:47:30.70 3.0 undecidable manual S -0.06 0
IV.MF5.EHZ. 2021-09-19T12:47:10.24 0.6 undecidable manual S 18 40.7259 92 0.91 37
IV.MC2.EHZ. 2021-09-19T12:47:07.14 0.6 undecidable manual S 343 31.5462 94 0.25 47
IV.GAVE.EHZ. 2021-09-19T12:47:07.53 0.6 undecidable manual S 280 33.744 93 0.04 49
IV.GIGS.HJZ. 2021-09-19T12:47:06.32 0.6 undecidable manual S 133 30.3474 94 -0.24 47
IV.T0110.HHZ. 2021-09-19T12:47:06.56 3.0 undecidable manual P -0.06 0
IV.CSP1.EHZ. 2021-09-19T12:47:05.17 3.0 positive manual P -0.11 0
IV.MMO1.EHZ. 2021-09-19T12:47:05.93 3.0 undecidable manual S 0
IV.NRCA.HHZ. 2021-09-19T12:47:05.18 0.6 undecidable manual S 325 26.3514 95 -0.34 46
IV.CESI.HHZ. 2021-09-19T12:47:05.19 3.0 undecidable manual P -0.29 0
IV.TERO.HHZ. 2021-09-19T12:47:04.83 0.6 undecidable manual S 94 24.6531 96 -0.25 48
IV.GUMA.HHZ. 2021-09-19T12:47:04.93 3.0 undecidable manual P 0.29 0
IV.MF5.EHZ. 2021-09-19T12:47:04.03 0.6 undecidable manual P 18 40.7259 92 0.33 45
IV.ARRO.EHZ. 2021-09-19T12:47:04.13 3.0 negative manual P -0.11 0
IV.LNSS.HHZ. 2021-09-19T12:47:04.31 0.6 undecidable manual S 259 21.7671 98 0.01 50
IV.RM33.EHZ. 2021-09-19T12:47:03.04 0.6 undecidable manual S 206 16.1727 106 0.21 49
IV.MC2.EHZ. 2021-09-19T12:47:02.44 0.6 positive manual P 343 31.5462 94 0.15 48
IV.GAVE.EHZ. 2021-09-19T12:47:02.49 0.1 positive manual P 280 33.744 93 -0.15 95
IV.CAMP.HHZ. 2021-09-19T12:47:02.41 0.6 undecidable manual S 143 14.4744 111 0.01 51
IV.MTRA.HNZ. 2021-09-19T12:47:02.12 0.6 undecidable manual S 31 15.0738 109 -0.43 47
IV.TERO.HHZ. 2021-09-19T12:47:01.12 0.1 undecidable manual P 94 24.6531 96 -0.12 98
IV.GIGS.HJZ. 2021-09-19T12:47:01.93 0.1 undecidable manual P 133 30.3474 94 -0.17 96
IV.NRCA.HHZ. 2021-09-19T12:47:01.29 0.1 positive manual P 325 26.3514 95 -0.21 95
IV.RM33.EHZ. 2021-09-19T12:47:00.17 1.0 undecidable manual P 206 16.1727 106 0.22 24
IV.SMA1.EHZ. 2021-09-19T12:47:00.25 0.6 undecidable manual S 111 2.8971 163 -0.03 52
IV.LNSS.HHZ. 2021-09-19T12:47:00.78 0.1 undecidable manual P 259 21.7671 98 -0.01 100
IV.T1299.HNZ. 2021-09-19T12:47:00.34 0.6 undecidable manual S 249 1.6983 170 0.13 51
IV.CAMP.HHZ. 2021-09-19T12:46:59.87 0.1 undecidable manual P 143 14.4744 111 0.17 98
IV.MTRA.HNZ. 2021-09-19T12:46:59.67 0.1 undecidable manual P 31 15.0738 109 -0.12 100
IV.SMA1.EHZ. 2021-09-19T12:46:58.65 0.6 undecidable manual P 111 2.8971 163 0.17 50
IV.T1299.HNZ. 2021-09-19T12:46:58.66 0.1 undecidable manual P 249 1.6983 170 0.23 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.4 0.00035 0.26 AML other m 2021-09-19T12:47:00.54
IV.SMA1.EHE. ML:1.4 0.000377 0.24 AML other m 2021-09-19T12:47:00.70
IV.MTRA.EHN. ML:1.6 0.00034950000000000004 0.28 AML other m 2021-09-19T12:47:02.35
IV.MTRA.EHE. ML:1.6 0.000317 0.28 AML other m 2021-09-19T12:47:02.37
IV.RM33.EHN. ML:1.3 0.0001715 0.32 AML other m 2021-09-19T12:47:03.17
IV.RM33.EHE. ML:1.2 0.00013255 0.76 AML other m 2021-09-19T12:47:03.22
IV.LNSS.HHE. ML:1.2 0.00011649999999999999 0.14 AML other m 2021-09-19T12:47:04.50
IV.LNSS.HHN. ML:1.2 0.0001032 0.34 AML other m 2021-09-19T12:47:04.38
IV.NRCA.HHE. ML:2.0 0.00047750000000000006 0.16 AML other m 2021-09-19T12:47:05.38
IV.NRCA.HHN. ML:1.7 0.000255 1.12 AML other m 2021-09-19T12:47:05.25
IV.GAVE.EHE. ML:1.4 0.00011245 0.68 AML other m 2021-09-19T12:47:08.47
IV.GAVE.EHN. ML:1.4 0.00009675000000000001 0.78 AML other m 2021-09-19T12:47:08.96
IV.ARRO.EHN. ML:1.0 0.00003095 0.48 AML other m 2021-09-19T12:47:14.66
IV.ARRO.EHE. ML:1.0 0.00002835 0.96 AML other m 2021-09-19T12:47:16.63
IV.LAV9.HHN. ML:2.5 0.0002285 0.52 AML other m 2021-09-19T12:47:31.52
IV.LAV9.HHE. ML:2.6 0.00027850000000000005 0.4 AML other m 2021-09-19T12:47:31.84
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