Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 04-10-2021 and time 21:51:21 (Italy) in region 2 km SW Pescosolido (FR)

A magnitude ML 1.0 earthquake occured in region: 2 km SW Pescosolido (FR), on

  • 04-10-2021 19:51:21 (UTC)
  • 04-10-2021 21:51:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7360, 13.6420 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
Pescosolido FR 2 1555 1555
Sora FR 3 26144 27699
Campoli Appennino FR 3 1725 29424
Broccostella FR 4 2741 32165
Posta Fibreno FR 7 1139 33304
Fontechiari FR 8 1303 34607
Isola del Liri FR 8 11715 46322
Vicalvi FR 8 783 47105
Castelliri FR 10 3454 50559
Alvito FR 10 2713 53272
Arpino FR 10 7262 60534
Balsorano AQ 10 3569 64103
Casalvieri FR 13 2698 66801
Casalattico FR 14 574 67375
Santopadre FR 15 1357 68732
San Donato Val di Comino FR 15 2107 70839
San Vincenzo Valle Roveto AQ 15 2347 73186
Pescasseroli AQ 15 2203 75389
Monte San Giovanni Campano FR 15 12929 88318
Villavallelonga AQ 15 919 89237
Gallinaro FR 16 1269 90506
Fontana Liri FR 16 2953 93459
Opi AQ 17 420 93879
Rocca d'Arce FR 17 959 94838
Arce FR 17 5756 100594
Boville Ernica FR 17 8737 109331
Collelongo AQ 18 1233 110564
Atina FR 18 4316 114880
Settefrati FR 19 728 115608
Veroli FR 19 20560 136168
Strangolagalli FR 19 2491 138659

Municipalities with at least 50000 inhabitants

An earthquake occurred to
68 Km E of Latina (125985 inhabitants)
71 Km S of L'Aquila (69753 inhabitants)
72 Km E of Velletri (53303 inhabitants)
74 Km E of Tivoli (56533 inhabitants)
81 Km E of Guidonia Montecelio (88673 inhabitants)
81 Km SW of Chieti (51815 inhabitants)
84 Km E of Aprilia (73446 inhabitants)
90 Km E of Anzio (54211 inhabitants)
93 Km NW of Caserta (76326 inhabitants)
94 Km SW of Pescara (121014 inhabitants)
95 Km E of Pomezia (62966 inhabitants)
96 Km SW of Montesilvano (53738 inhabitants)
97 Km NW of Aversa (53047 inhabitants)
98 Km E of Roma (2864731 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 1.0 2021-10-04
19:51:21		 41.7357 13.6415 9 2021-10-04
20:03:08		 Sala Sismica INGV-Roma 96215581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-04 19:51:21 ± 0.18
Latitude 41.7357 ± 0.0081
Longitude 13.6415 ± 0.0193
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96215581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1661
Semi-minor axis of confidence ellipse (meter) 376
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 112
Circular confidence region, given by single value of horizontal uncertainty (meter) 1660.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 170
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.33904
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 96215581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-04 20:03:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.USI.HHZ. 2021-10-04T19:52:45.11 3.0 undecidable manual Sn -3.44 0
IX.SCL3.EHZ.02 2021-10-04T19:52:40.69 3.0 undecidable manual Sn 5.13 0
IV.PIPA.HHZ. 2021-10-04T19:52:31.88 3.0 undecidable manual Pg 20.690001 0
IV.HVIT.HHZ. 2021-10-04T19:52:24.55 3.0 negative manual Pn -0.04 0
IV.CRAC.EHZ. 2021-10-04T19:52:08.08 3.0 undecidable manual Pn 7.41 0
IV.MFNL.HHZ. 2021-10-04T19:52:06.68 3.0 positive manual Pn -2.22 0
CR.STON.BHZ. 2021-10-04T19:52:00.76 3.0 undecidable manual Pn -1.81 0
CR.ZAG.BHZ. 2021-10-04T19:51:55.44 3.0 positive manual Pn -4.11 0
IV.MSSA.HHZ. 2021-10-04T19:51:54.41 3.0 undecidable manual Sg 2.98 0
OT.OT17.EHZ. 2021-10-04T19:51:45.14 3.0 negative manual Pn 2.33 0
CH.BERNI.HHZ. 2021-10-04T19:51:42.92 3.0 negative manual Pn -5.33 0
IV.MILN.HHZ. 2021-10-04T19:51:41.14 3.0 undecidable manual Pg 1.69 0
IV.CAPR.HNZ. 2021-10-04T19:51:40.78 3.0 undecidable manual Pg 2.15 0
IV.INTR.HHZ. 2021-10-04T19:51:34.37 0.6 undecidable manual S 35 37.5291 50 0.44 47
IV.GIUL.HHZ. 2021-10-04T19:51:34.13 0.3 undecidable manual S 239 37.629 50 0.18 74
IV.PTQR.HHE. 2021-10-04T19:51:33.52 0.6 undecidable manual S 328 37.4292 50 -0.39 47
IV.FIR.HHZ. 2021-10-04T19:51:31.54 3.0 undecidable manual Sg 0.38 0
IV.NDIM.HHZ. 2021-10-04T19:51:30.51 3.0 negative manual Pg 3.35 0
IV.VOBA.EHZ. 2021-10-04T19:51:29.10 3.0 negative manual Pn -8.22 0
IV.INTR.HHZ. 2021-10-04T19:51:28.26 0.3 undecidable manual P 35 37.5291 50 -0.23 73
IV.PTQR.HHE. 2021-10-04T19:51:28.97 0.6 undecidable manual P 328 37.4292 50 0.49 46
IV.VVLD.HHZ. 2021-10-04T19:51:27.42 0.3 undecidable manual S 354 14.9739 122 0.29 75
IV.GIUL.HHZ. 2021-10-04T19:51:27.98 1.0 undecidable manual P 239 37.629 50 -0.52 23
IV.LRP.EHZ. 2021-10-04T19:51:26.24 0.3 undecidable manual S 205 10.7781 130 0.27 76
IV.VVLD.HHZ. 2021-10-04T19:51:24.26 0.1 undecidable manual P 354 14.9739 122 -0.3 100
IV.LRP.EHZ. 2021-10-04T19:51:23.58 0.3 undecidable manual P 205 10.7781 130 -0.31 75
IV.MSSA.HHZ. 2021-10-04T19:51:19.43 3.0 undecidable manual P -6.26 0
IV.FIR.HHZ. 2021-10-04T19:51:09.39 3.0 undecidable manual P -4.91 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LRP.EHN. ML:0.6 0.000044035085 0.2176 AML other m 2021-10-04T19:51:26.60
IV.VVLD.HHN. ML:1.4 0.00022727069999999998 0.2304 AML other m 2021-10-04T19:51:27.72
IV.VVLD.HHE. ML:1.2 0.000152 0.18 AML other m 2021-10-04T19:51:27.71
IV.LRP.EHE. ML:1.0 0.00013435515 0.2176 AML other m 2021-10-04T19:51:26.30
IV.VVLD.HNE. ML:1.0 0.00008892745 0.1408 AML other m 2021-10-04T19:51:27.72
IV.VVLD.HNN. ML:1.0 0.0001068508 0.1664 AML other m 2021-10-04T19:51:27.61
IV.GIUL.HHN. ML:0.6 0.0000145030105 0.1152 AML other m 2021-10-04T19:51:34.56
IV.GIUL.HHE. ML:0.4 0.0000094280905 0.1664 AML other m 2021-10-04T19:51:34.43
IV.INTR.HHN. ML:1.0 0.000041675135 0.1792 AML other m 2021-10-04T19:51:35.17
IV.INTR.HNE. ML:1.2 0.000066380915 0.1792 AML other m 2021-10-04T19:51:35.16
IV.INTR.HNN. ML:1.2 0.000056753195 0.2048 AML other m 2021-10-04T19:51:35.28
IV.INTR.HHE. ML:1.2 0.000061671949 0.2048 AML other m 2021-10-04T19:51:35.50
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