Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 27-07-2021 and time 20:03:39 (Italy) in region 4 km E Ovindoli (AQ)

A magnitude ML 1.3 earthquake occured in region: 4 km E Ovindoli (AQ), on

  • 27-07-2021 18:03:39 (UTC)
  • 27-07-2021 20:03:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.1360, 13.5730 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
Ovindoli AQ 5 1227 1227
Celano AQ 6 11017 12244
Aielli AQ 6 1475 13719
Cerchio AQ 8 1635 15354
Secinaro AQ 9 359 15713
Rocca di Mezzo AQ 9 1526 17239
Collarmele AQ 9 894 18133
Tione degli Abruzzi AQ 9 310 18443
Gagliano Aterno AQ 11 254 18697
Fontecchio AQ 11 369 19066
Castelvecchio Subequo AQ 13 982 20048
Acciano AQ 13 327 20375
Rocca di Cambio AQ 13 533 20908
Fagnano Alto AQ 13 418 21326
Molina Aterno AQ 14 386 21712
Pescina AQ 14 4133 25845
Castel di Ieri AQ 14 303 26148
San Benedetto dei Marsi AQ 15 3909 30057
Massa d'Albe AQ 15 1476 31533
Villa Sant'Angelo AQ 15 424 31957
Caporciano AQ 15 230 32187
Prata d'Ansidonia AQ 16 496 32683
Avezzano AQ 17 42515 75198
San Demetrio ne' Vestini AQ 17 1854 77052
San Benedetto in Perillis AQ 17 113 77165
Navelli AQ 17 554 77719
Sant'Eusanio Forconese AQ 18 394 78113
Magliano de' Marsi AQ 18 3690 81803
Goriano Sicoli AQ 18 569 82372
San Pio delle Camere AQ 18 661 83033
Ocre AQ 19 1167 84200
Fossa AQ 19 721 84921
Collepietro AQ 20 237 85158
Trasacco AQ 20 6246 91404
Raiano AQ 20 2815 94219
Ortona dei Marsi AQ 20 542 94761

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SE of L'Aquila (69753 inhabitants)
55 Km W of Chieti (51815 inhabitants)
59 Km S of Teramo (54892 inhabitants)
64 Km SW of Montesilvano (53738 inhabitants)
64 Km SW of Pescara (121014 inhabitants)
67 Km E of Tivoli (56533 inhabitants)
71 Km E of Guidonia Montecelio (88673 inhabitants)
83 Km NE of Velletri (53303 inhabitants)
90 Km SE of Terni (111501 inhabitants)
93 Km NE of Latina (125985 inhabitants)
94 Km E of Roma (2864731 inhabitants)
97 Km NE of Aprilia (73446 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 1.3 2021-07-27
18:03:39		 42.1357 13.5727 11 2021-07-27
18:35:03		 Sala Sismica INGV-Roma 93276951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-27 18:03:39 ± 0.1
Latitude 42.1357 ± 0.0081
Longitude 13.5727 ± 0.0097
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93276951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1095
Semi-minor axis of confidence ellipse (meter) 327
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 317
Circular confidence region, given by single value of horizontal uncertainty (meter) 1100.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 9
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.27609
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 93276951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-27 18:35:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.USI.HHZ. 2021-07-27T18:05:22.77 3.0 undecidable manual Sg 9.9 0
CR.ZAG.BHZ. 2021-07-27T18:05:06.42 3.0 undecidable manual Sn -1.71 0
IV.LINA.HHZ. 2021-07-27T18:05:05.52 3.0 positive manual Pn -1.38 0
IV.AGLI.HHZ. 2021-07-27T18:05:01.95 3.0 undecidable manual Sn -2.27 0
AC.VLO.HHZ. 2021-07-27T18:04:58.18 3.0 undecidable manual Pg 15.06 0
IV.MILZ.HHZ. 2021-07-27T18:04:49.02 3.0 undecidable manual Pg 12.37 0
IV.VARE.HHZ. 2021-07-27T18:04:42.78 3.0 positive manual Pn 3.67 0
IV.GIZZ.HHZ. 2021-07-27T18:04:35.18 3.0 positive manual Pn 3.42 0
IV.ZEN8.EHZ. 2021-07-27T18:04:34.69 3.0 negative manual Pg 10.33 0
CR.STON.BHZ. 2021-07-27T18:04:34.54 3.0 undecidable manual Pg 17.01 0
IV.IMOL.HNZ. 2021-07-27T18:04:30.20 3.0 undecidable manual Sn -0.94 0
IV.CAPR.HNZ. 2021-07-27T18:04:27.75 3.0 positive manual Pn -1.28 0
OX.FUSE.HHZ. 2021-07-27T18:04:26.39 3.0 positive manual Pn -0.76 0
IV.SPS2.HHZ. 2021-07-27T18:04:24.43 3.0 negative manual Pn -4.39 0
IV.VOBA.EHZ. 2021-07-27T18:04:24.25 3.0 positive manual Pn -1.42 0
TV.SF04.EHZ. 2021-07-27T18:04:14.98 3.0 undecidable manual Sg 2.9 0
IV.NARO.HHZ. 2021-07-27T18:04:10.11 3.0 undecidable manual Sn 1.55 0
GU.GSCL.HHZ. 2021-07-27T18:04:08.09 3.0 undecidable manual Pn -4.19 0
IV.MCRV.HHZ. 2021-07-27T18:04:06.69 3.0 undecidable manual Pn 1.51 0
IV.MMUR.HNZ. 2021-07-27T18:04:05.28 3.0 undecidable manual Sn 3.2 0
IV.SSFR.HNZ. 2021-07-27T18:04:01.49 3.0 undecidable manual Sn -2.03 0
IV.CPGN.EHZ. 2021-07-27T18:03:56.67 3.0 undecidable manual Pn 1.37 0
TV.SF04.EHZ. 2021-07-27T18:03:55.83 3.0 negative manual Pg 1.97 0
IV.INTR.HHZ. 2021-07-27T18:03:50.24 0.3 undecidable manual S 117 30.6471 50 0.3 70
IV.PTQR.HHZ. 2021-07-27T18:03:46.71 0.3 undecidable manual S 228 18.9699 119 0 76
IV.T0110.HHZ. 2021-07-27T18:03:46.84 0.3 undecidable manual S 58 19.6692 118 -0.1 74
IV.VVLD.HHZ. 2021-07-27T18:03:45.17 0.3 undecidable manual P 172 29.8479 50 -0.1 73
IV.FAGN.HHZ. 2021-07-27T18:03:45.38 0.3 undecidable manual S 4 14.4744 126 -0.01 76
IV.INTR.HHZ. 2021-07-27T18:03:45.04 0.3 undecidable manual P 117 30.6471 50 -0.36 69
IV.PTQR.HHZ. 2021-07-27T18:03:43.59 0.1 undecidable manual P 228 18.9699 119 0.06 100
IV.T0110.HHZ. 2021-07-27T18:03:43.76 0.3 undecidable manual P 58 19.6692 118 0.1 74
IV.FAGN.HHZ. 2021-07-27T18:03:42.86 0.3 undecidable manual P 4 14.4744 126 0.09 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FAGN.HHN. ML:1.9 0.000836 1.72 AML other m 2021-07-27T18:03:45.05
IV.FAGN.HHE. ML:2.0 0.00100408075 0.5248 AML other m 2021-07-27T18:03:48.21
IV.PTQR.HHE. ML:1.2 0.00011143201 0.1792 AML other m 2021-07-27T18:03:48.63
IV.T0110.HHN. ML:1.2 0.0001304486 0.256 AML other m 2021-07-27T18:03:49.07
IV.PTQR.HHN. ML:1.0 0.00007803462 0.1664 AML other m 2021-07-27T18:03:48.51
IV.VVLD.HHE. ML:1.2 0.00007131305 0.4736 AML other m 2021-07-27T18:03:52.97
IV.INTR.HHE. ML:1.1 0.00006209957 0.448 AML other m 2021-07-27T18:03:53.93
IV.VVLD.HHN. ML:1.1 0.00005785 0.52 AML other m 2021-07-27T18:03:54.59
IV.INTR.HHN. ML:1.3 0.00009234658 0.4352 AML other m 2021-07-27T18:03:55.10
IV.T0110.HHE. ML:1.2 0.000129 0.74 AML other m 2021-07-27T18:03:55.23
IV.VVLD.HNE. ML:1.5 0.000153628675 0.5248 AML other m 2021-07-27T18:03:52.99
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