Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 09-11-2021 and time 05:37:19 (Italy) in region 2 km SE Alatri (FR)

A magnitude ML 1.4 earthquake occured in region: 2 km SE Alatri (FR), on

  • 09-11-2021 04:37:19 (UTC)
  • 09-11-2021 05:37:19 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.7200, 13.3610 at 9 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
Alatri FR 2 28952 28952
Collepardo FR 5 968 29920
Veroli FR 6 20560 50480
Fumone FR 6 2102 52582
Vico nel Lazio FR 7 2234 54816
Frosinone FR 9 46323 101139
Ferentino FR 9 21213 122352
Trivigliano FR 10 1705 124057
Guarcino FR 10 1623 125680
Torrice FR 10 4816 130496
Torre Cajetani FR 11 1376 131872
Boville Ernica FR 13 8737 140609
Ripi FR 13 5270 145879
Fiuggi FR 15 10536 156415
Arnara FR 15 2309 158724
Monte San Giovanni Campano FR 16 12929 171653
Morolo FR 16 3257 174910
Castelliri FR 16 3454 178364
Supino FR 17 4873 183237
Ceccano FR 17 23565 206802
Patrica FR 17 3171 209973
Strangolagalli FR 17 2491 212464
Anagni FR 17 21464 233928
Acuto FR 18 1920 235848
Pofi FR 18 4204 240052
Morino AQ 18 1448 241500
Sgurgola FR 18 2676 244176
Isola del Liri FR 18 11715 255891
Trevi nel Lazio FR 19 1822 257713
San Vincenzo Valle Roveto AQ 19 2347 260060
Filettino FR 19 565 260625
Balsorano AQ 19 3569 264194
Fontana Liri FR 20 2953 267147

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km NE of Latina (125985 inhabitants)
49 Km E of Velletri (53303 inhabitants)
54 Km SE of Tivoli (56533 inhabitants)
61 Km E of Aprilia (73446 inhabitants)
61 Km SE of Guidonia Montecelio (88673 inhabitants)
68 Km E of Anzio (54211 inhabitants)
70 Km S of L'Aquila (69753 inhabitants)
72 Km E of Pomezia (62966 inhabitants)
75 Km E of Roma (2864731 inhabitants)
93 Km E of Fiumicino (78395 inhabitants)
97 Km SW of Chieti (51815 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 2021-11-09
04:37:19		 41.7195 13.3607 9 2021-11-09
04:55:05		 Sala Sismica INGV-Roma 97354811
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-09 04:37:19 ± 0.03
Latitude 41.7195 ± 0.0018
Longitude 13.3607 ± 0.0024
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97354811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 170
Semi-minor axis of confidence ellipse (meter) 147
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 59
Circular confidence region, given by single value of horizontal uncertainty (meter) 170.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 60
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.08364
Epicentral distance of station farthest from the epicenter (degree) 0.57736
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 97354811
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-09 04:55:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.INTR.HHE. 2021-11-09T04:37:37.21 0.6 undecidable manual S 54 55.4001 50 0.06 46
IV.CERA.HNE. 2021-11-09T04:37:37.65 1.0 undecidable manual S 104 56.0994 50 0.3 22
IT.CSO1.HGE. 2021-11-09T04:37:35.21 0.3 undecidable manual S 332 47.9187 50 0.06 70
IV.MCI.EHE. 2021-11-09T04:37:34.56 1.0 undecidable manual S 124 45.3213 50 0.11 23
IV.LATB.EHN. 2021-11-09T04:37:33.48 1.0 undecidable manual S 233 41.4252 50 0.05 24
IV.CERT.HHN. 2021-11-09T04:37:32.96 1.0 undecidable manual S 309 40.3263 50 -0.18 23
IV.RCAV.EHE. 2021-11-09T04:37:32.52 1.0 undecidable manual S 293 37.1295 50 0.23 23
IT.OPI.HGE. 2021-11-09T04:37:32.60 0.6 undecidable manual S 81 39.3273 50 -0.27 45
IV.PTQR.HHZ. 2021-11-09T04:37:31.45 0.3 undecidable manual S 6 33.744 50 0.09 71
IV.FIAM.HNZ. 2021-11-09T04:37:30.96 0.6 undecidable manual P 342 64.0914 50 -0.02 46
IV.POFI.HHE. 2021-11-09T04:37:30.24 0.3 undecidable manual S 90 29.0487 107 0.3 69
IV.CERA.HNE. 2021-11-09T04:37:29.90 0.1 undecidable manual P 104 56.0994 50 0.14 91
IV.VVLD.HHE. 2021-11-09T04:37:29.25 0.3 undecidable manual S 52 27.3504 108 -0.12 72
IV.INTR.HHE. 2021-11-09T04:37:29.38 0.1 undecidable manual P 54 55.4001 50 -0.26 88
IV.LIK.EHE.01 2021-11-09T04:37:29.90 1.0 undecidable manual S 146 29.4483 107 -0.16 24
IT.CSO1.HGE. 2021-11-09T04:37:28.57 1.0 undecidable manual P 332 47.9187 50 0.08 23
IV.MCI.EHE. 2021-11-09T04:37:28.26 0.6 undecidable manual P 124 45.3213 50 0.17 46
IV.LATB.EHN. 2021-11-09T04:37:27.44 0.3 undecidable manual P 233 41.4252 50 -0.06 71
IV.CERT.HHN. 2021-11-09T04:37:27.42 1.0 undecidable manual P 309 40.3263 50 0.09 24
IV.LRP.EHZ. 2021-11-09T04:37:27.18 0.3 undecidable manual S 113 20.3685 113 0.09 73
IT.OPI.HGE. 2021-11-09T04:37:27.10 1.0 undecidable manual P 81 39.3273 50 -0.08 24
IV.PTQR.HHZ. 2021-11-09T04:37:26.36 0.1 undecidable manual P 6 33.744 50 0.05 96
IV.GIUL.HHZ. 2021-11-09T04:37:26.88 0.3 undecidable manual S 206 19.9689 114 -0.07 73
IV.RCAV.EHE. 2021-11-09T04:37:26.62 1.0 undecidable manual P 293 37.1295 50 -0.22 23
IV.LIK.EHE.01 2021-11-09T04:37:25.61 1.0 undecidable manual P 146 29.4483 107 0.06 24
IV.POFI.HHE. 2021-11-09T04:37:25.36 0.1 undecidable manual P 90 29.0487 107 -0.12 95
IV.VVLD.HHE. 2021-11-09T04:37:24.96 0.1 negative manual P 52 27.3504 108 -0.19 94
IV.GUAR.HHZ. 2021-11-09T04:37:23.94 0.3 undecidable manual S 334 9.2796 134 0.12 74
IV.GIUL.HHZ. 2021-11-09T04:37:23.73 0.1 positive manual P 206 19.9689 114 -0.03 99
IV.LRP.EHZ. 2021-11-09T04:37:23.86 0.1 positive manual P 113 20.3685 113 0.02 99
IV.GUAR.HHZ. 2021-11-09T04:37:22.01 0.1 positive manual P 334 9.2796 134 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GUAR.HHN. ML:1.6 0.0006094999999999999 0.24 AML other m 2021-11-09T04:37:24.58
IV.GUAR.HHE. ML:1.5 0.00042699999999999997 0.82 AML other m 2021-11-09T04:37:24.57
IV.GUAR.HNE. ML:1.4 0.000406 0.84 AML other m 2021-11-09T04:37:24.58
IV.GUAR.HNN. ML:1.6 0.0006060000000000001 0.94 AML other m 2021-11-09T04:37:25.58
IV.GIUL.HHN. ML:1.0 0.00007485 0.2 AML other m 2021-11-09T04:37:27.58
IV.LRP.EHE. ML:1.5 0.0002395 0.32 AML other m 2021-11-09T04:37:27.66
IV.LRP.EHN. ML:0.8 0.000047 0.56 AML other m 2021-11-09T04:37:28.20
IV.GIUL.HHE. ML:1.0 0.0000724 0.46 AML other m 2021-11-09T04:37:29.36
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