Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 07-07-2021 and time 17:09:48 (Italy) in region 4 km S Accumoli (RI)

A magnitude ML 1.4 earthquake occured in region: 4 km S Accumoli (RI), on

  • 07-07-2021 15:09:48 (UTC)
  • 07-07-2021 17:09:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6620, 13.2510 at 10 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
Accumoli RI 4 667 667
Amatrice RI 5 2657 3324
Cittareale RI 9 482 3806
Arquata del Tronto AP 13 1178 4984
Campotosto AQ 15 542 5526
Montereale AQ 15 2581 8107
Capitignano AQ 16 665 8772
Acquasanta Terme AP 18 2916 11688
Borbona RI 19 617 12305
Norcia PG 19 4957 17262
Posta RI 20 694 17956

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km NW of L'Aquila (69753 inhabitants)
37 Km W of Teramo (54892 inhabitants)
51 Km E of Terni (111501 inhabitants)
55 Km SE of Foligno (57155 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
82 Km W of Pescara (121014 inhabitants)
83 Km W of Chieti (51815 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km SE of Perugia (166134 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
98 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 1.4 2021-07-07
15:09:48		 42.6618 13.2507 10 2021-07-07
15:23:52		 Sala Sismica INGV-Roma 92365401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-07 15:09:48 ± 0.07
Latitude 42.6618 ± 0.0045
Longitude 13.2507 ± 0.0061
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 92365401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 450
Semi-minor axis of confidence ellipse (meter) 423
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 257
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 47
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.43078
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 92365401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-07 15:23:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GALF.HHZ. 2021-07-07T15:11:14.47 3.0 undecidable manual Sn -4.14 0
IV.IMOL.HNZ. 2021-07-07T15:11:13.95 3.0 undecidable manual Sg 17.379999 0
GU.ENR.HHZ. 2021-07-07T15:11:07.76 3.0 negative manual Pg 24.209999 0
IV.LPDG.HHZ. 2021-07-07T15:11:05.40 3.0 undecidable manual Pn 11.34 0
AC.VLO.HHZ. 2021-07-07T15:11:01.21 3.0 undecidable manual Sn -0.97 0
GU.IMI.HHZ. 2021-07-07T15:11:01.60 3.0 negative manual Pg 23.459999 0
IV.EUCT.HNZ. 2021-07-07T15:10:59.76 3.0 undecidable manual Pg 25.120001 0
GU.LSD.HHZ. 2021-07-07T15:10:58.95 3.0 undecidable manual Pn 6.85 0
GU.RRL.HHZ. 2021-07-07T15:10:58.58 3.0 positive manual Pn 6.49 0
IV.VOBA.EHZ. 2021-07-07T15:10:53.95 3.0 undecidable manual Pg 25.32 0
IV.ZONE.HHZ. 2021-07-07T15:10:51.35 3.0 undecidable manual Pg 19.219999 0
IV.FIR.HHZ. 2021-07-07T15:10:48.50 3.0 undecidable manual Sn -7.18 0
IV.TOLF.HHZ. 2021-07-07T15:10:47.30 3.0 undecidable manual Sg 9.86 0
IV.SFI.EHZ. 2021-07-07T15:10:44.70 3.0 undecidable manual Sn -5.12 0
IV.APEC.HNZ. 2021-07-07T15:10:34.22 3.0 undecidable manual Sn -5.48 0
IV.MTGR.HHZ. 2021-07-07T15:10:34.85 3.0 undecidable manual Pn 9.8 0
IV.BSSO.HHZ. 2021-07-07T15:10:22.31 3.0 undecidable manual Sg 6.56 0
IV.PZUN.HHZ. 2021-07-07T15:10:22.58 3.0 undecidable manual Sn -1.86 0
IX.SCL3.EHZ.02 2021-07-07T15:10:21.79 3.0 undecidable manual Sn -1.3 0
AC.VLO.HHZ. 2021-07-07T15:10:16.13 3.0 undecidable manual Pn 2.57 0
IV.TDS.HHZ. 2021-07-07T15:10:15.09 3.0 undecidable manual Pn 13.08 0
IX.RSF3.HHZ.02 2021-07-07T15:10:15.33 3.0 undecidable manual Sn -4.32 0
IV.CSP1.EHZ. 2021-07-07T15:10:04.18 0.3 undecidable manual S 356 47.8188 50 0.51 64
IV.MTMR.EHZ. 2021-07-07T15:10:03.01 3.0 undecidable manual Pg 13.02 0
IV.TOLF.HHZ. 2021-07-07T15:09:59.11 3.0 positive manual Pn -0.55 0
IV.TERO.HHZ. 2021-07-07T15:09:58.22 0.3 undecidable manual S 98 29.1486 50 -0.46 67
IV.GAVE.EHZ. 2021-07-07T15:09:58.30 0.3 undecidable manual S 277 29.2485 50 -0.41 68
IV.MC2.EHZ. 2021-07-07T15:09:58.82 0.1 undecidable manual S 350 28.1496 50 0.41 91
IV.CSP1.EHZ. 2021-07-07T15:09:57.20 0.3 undecidable manual P 356 47.8188 50 0.06 71
IV.NRCA.HHZ. 2021-07-07T15:09:56.24 0.3 undecidable manual S 330 22.0668 115 -0.39 69
IV.RM33.EHZ. 2021-07-07T15:09:55.16 0.3 undecidable manual S 190 17.1717 120 0.02 75
IV.LNSS.HHZ. 2021-07-07T15:09:55.44 0.3 undecidable manual S 249 18.3705 119 -0.05 75
IV.ATFO.HHZ. 2021-07-07T15:09:55.91 3.0 undecidable manual Pn -3.07 0
IV.GAVE.EHZ. 2021-07-07T15:09:54.15 0.1 undecidable manual P 277 29.2485 50 -0.13 96
IV.MC2.EHZ. 2021-07-07T15:09:54.15 0.1 undecidable manual P 350 28.1496 50 0.05 98
IV.MTRA.EHZ. 2021-07-07T15:09:54.37 0.3 undecidable manual S 48 15.873 122 -0.37 70
IV.TERO.HHZ. 2021-07-07T15:09:54.13 0.1 undecidable manual P 98 29.1486 50 -0.13 96
IV.COLB.HHZ. 2021-07-07T15:09:53.73 3.0 undecidable manual Pn 1.62 0
IV.MTRA.EHZ. 2021-07-07T15:09:52.05 0.1 undecidable manual P 48 15.873 122 0.06 100
IV.NRCA.HHZ. 2021-07-07T15:09:52.94 0.1 undecidable manual P 330 22.0668 115 -0.14 98
IV.RM33.EHZ. 2021-07-07T15:09:52.40 0.1 undecidable manual P 190 17.1717 120 0.19 97
IV.SMA1.EHZ. 2021-07-07T15:09:52.74 0.3 undecidable manual S 117 7.6812 142 0.11 75
IV.LNSS.HHZ. 2021-07-07T15:09:52.55 0.1 undecidable manual P 249 18.3705 119 0.14 98
IV.SMA1.EHZ. 2021-07-07T15:09:51.05 0.1 undecidable manual P 117 7.6812 142 0.29 97
IV.BSSO.HHZ. 2021-07-07T15:09:49.05 3.0 undecidable manual P 1.57 0
IV.LPEL.HHZ. 2021-07-07T15:09:48.90 3.0 undecidable manual P 1.29 0
IV.TREM.HHZ. 2021-07-07T15:09:46.60 3.0 negative manual Pn 0.39 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.7 0.0007304999999999999 0.16 AML other m 2021-07-07T15:09:53.27
IV.SMA1.EHN. ML:1.6 0.0005555 0.42 AML other m 2021-07-07T15:09:53.32
IV.MTRA.HNN. ML:1.6 0.0003235 0.9 AML other m 2021-07-07T15:09:54.20
IV.MTRA.EHN. ML:1.6 0.0003255 0.5 AML other m 2021-07-07T15:09:54.90
IV.MTRA.HNE. ML:1.5 0.000316 1 AML other m 2021-07-07T15:09:55.62
IV.MTRA.EHE. ML:1.5 0.00028900000000000003 1.62 AML other m 2021-07-07T15:09:55.13
IV.LNSS.HHE. ML:1.4 0.00021300000000000003 0.14 AML other m 2021-07-07T15:09:55.80
IV.LNSS.HHN. ML:1.4 0.000186 0.34 AML other m 2021-07-07T15:09:55.69
IV.RM33.EHN. ML:1.1 0.0001036 1.14 AML other m 2021-07-07T15:09:56.67
IV.RM33.HNE. ML:1.3 0.00017099999999999998 1.6 AML other m 2021-07-07T15:09:56.10
IV.RM33.EHE. ML:1.0 0.00008355 1.7 AML other m 2021-07-07T15:09:56.11
IV.NRCA.HHN. ML:1.2 0.0000971 0.1 AML other m 2021-07-07T15:09:56.55
IV.NRCA.HHE. ML:1.2 0.000114 0.86 AML other m 2021-07-07T15:09:58.38
IV.GAVE.EHN. ML:1.3 0.00009275 1.24 AML other m 2021-07-07T15:09:58.95
IV.TERO.HHN. ML:1.3 0.00008855 1.16 AML other m 2021-07-07T15:09:58.96
IV.GAVE.EHE. ML:1.3 0.00010385 1.36 AML other m 2021-07-07T15:09:59.25
IV.TERO.HHE. ML:1.8 0.0003145 0.42 AML other m 2021-07-07T15:10:16.19
IV.RM33.HNN. ML:1.3 0.00017580000000000002 1.04 AML other m 2021-07-07T15:10:47.23
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