Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 02-05-2021 and time 03:53:52 (Italy) in region 3 km SE Villavallelonga (AQ)

A magnitude ML 1.8 earthquake occured in region: 3 km SE Villavallelonga (AQ), on

  • 02-05-2021 01:53:52 (UTC)
  • 02-05-2021 03:53:52 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.8480, 13.6480 at 14 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Villavallelonga AQ 3 919 919
Collelongo AQ 7 1233 2152
Balsorano AQ 9 3569 5721
Lecce nei Marsi AQ 10 1702 7423
San Vincenzo Valle Roveto AQ 10 2347 9770
Pescosolido FR 11 1555 11325
Ortucchio AQ 12 1860 13185
Bisegna AQ 12 223 13408
Campoli Appennino FR 13 1725 15133
Gioia dei Marsi AQ 13 1989 17122
Pescasseroli AQ 13 2203 19325
Sora FR 14 26144 45469
Civita d'Antino AQ 15 979 46448
Trasacco AQ 15 6246 52694
Morino AQ 16 1448 54142
Broccostella FR 16 2741 56883
Opi AQ 17 420 57303
Posta Fibreno FR 18 1139 58442
San Benedetto dei Marsi AQ 18 3909 62351
Ortona dei Marsi AQ 18 542 62893
Villalago AQ 19 568 63461
Alvito FR 20 2713 66174
Luco dei Marsi AQ 20 6079 72253
Vicalvi FR 20 783 73036
Isola del Liri FR 20 11715 84751
Civitella Roveto AQ 20 3268 88019
Fontechiari FR 20 1303 89322
Pescina AQ 20 4133 93455

Municipalities with at least 50000 inhabitants

An earthquake occurred to
60 Km SE of L'Aquila (69753 inhabitants)
71 Km SW of Chieti (51815 inhabitants)
71 Km E of Tivoli (56533 inhabitants)
74 Km E of Velletri (53303 inhabitants)
75 Km NE of Latina (125985 inhabitants)
78 Km E of Guidonia Montecelio (88673 inhabitants)
83 Km SW of Pescara (121014 inhabitants)
85 Km SW of Montesilvano (53738 inhabitants)
88 Km E of Aprilia (73446 inhabitants)
90 Km S of Teramo (54892 inhabitants)
96 Km E of Anzio (54211 inhabitants)
96 Km E of Roma (2864731 inhabitants)
97 Km E of Pomezia (62966 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
Bulletin
Rev1000 		ML 1.8 2021-05-02
01:53:52		 41.8485 13.6478 14 2021-12-29
11:12:22		 Bollettino Sismico Italiano INGV 94540771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-02 01:53:52 ± 0.1
Latitude 41.8485 ± 0.0036
Longitude 13.6478 ± 0.0060
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 94540771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 529
Semi-minor axis of confidence ellipse (meter) 49
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 123
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 17
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) 0.44426
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.5
Num. used stations 10
Type of magnitude ML
Reference to an origin 94540771
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-08-23 13:43:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CH.MUGIO.HHZ. 2021-05-02T01:55:27.89 3.0 undecidable manual Pg 21.34 0
IV.MCEL.HHZ. 2021-05-02T01:55:00.15 3.0 undecidable manual Sg 6.61 0
IV.CPGN.EHZ. 2021-05-02T01:54:57.46 3.0 undecidable manual Sg 6.84 0
IV.EMSG.HHZ. 2021-05-02T01:54:56.61 3.0 positive manual Pn 3.68 0
GU.GRAM.HHZ. 2021-05-02T01:54:48.87 3.0 undecidable manual Pn 3.24 0
IX.CSG3.HNZ.01 2021-05-02T01:54:42.76 3.0 undecidable manual Sg 2.21 0
IV.SEI.HHZ. 2021-05-02T01:54:32.26 3.0 undecidable manual Pn -0.12 0
IX.STN3.HNZ.01 2021-05-02T01:54:26.04 3.0 negative manual Pg 3.59 0
IV.T0110.HHZ. 2021-05-02T01:54:06.28 0.6 undecidable manual S 14 43.5231 96 0.11 47
IV.GIUL.HHZ. 2021-05-02T01:54:06.62 0.3 undecidable manual S 225 45.8208 95 -0.14 69
IV.INTR.HHZ. 2021-05-02T01:54:02.37 0.1 undecidable manual S 49 27.8499 101 0.36 91
IV.PTQR.HHZ. 2021-05-02T01:54:02.32 0.3 undecidable manual S 313 28.0497 101 0.25 69
IV.LRP.EHZ. 2021-05-02T01:54:00.77 0.1 undecidable manual S 193 22.9548 105 0.04 98
IV.GIUL.HHZ. 2021-05-02T01:54:00.44 0.1 positive manual P 225 45.8208 95 -0.1 92
IV.LPEL.HHZ. 2021-05-02T01:54:00.77 0.3 undecidable manual P 63 49.3173 95 -0.32 65
IV.T0110.HHZ. 2021-05-02T01:53:59.78 0.1 undecidable manual P 14 43.5231 96 -0.42 87
IT.OPI.HGE. 2021-05-02T01:53:59.16 0.1 undecidable manual S 118 17.0718 115 -0.1 97
IV.POFI.HHZ. 2021-05-02T01:53:58.98 0.3 undecidable manual S 160 15.4734 119 0.1 73
IV.PTQR.HHZ. 2021-05-02T01:53:57.98 0.1 undecidable manual P 313 28.0497 101 0.15 95
IV.LRP.EHZ. 2021-05-02T01:53:57.11 0.1 undecidable manual P 193 22.9548 105 0.05 98
IV.INTR.HHZ. 2021-05-02T01:53:57.91 0.1 positive manual P 49 27.8499 101 0.11 96
IV.POFI.HHZ. 2021-05-02T01:53:56.07 0.1 undecidable manual P 160 15.4734 119 0.08 98
IT.OPI.HGE. 2021-05-02T01:53:56.31 0.1 undecidable manual P 118 17.0718 115 0.1 98
IV.VVLD.HHZ. 2021-05-02T01:53:56.50 0.1 undecidable manual S 319 3.0969 165 -0.28 98
IV.VVLD.HHZ. 2021-05-02T01:53:54.83 0.1 undecidable manual P 319 3.0969 165 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.HNE. ML:2.0 0.001335 0.14 AML other m 2021-05-02T01:53:56.60
IV.VVLD.HHE. ML:2.1 0.0014750000000000002 0.14 AML other m 2021-05-02T01:53:56.60
IV.VVLD.HNN. ML:1.8 0.0007949999999999999 0.16 AML other m 2021-05-02T01:53:56.62
IV.VVLD.HHN. ML:1.8 0.0008515 0.16 AML other m 2021-05-02T01:53:56.62
IV.POFI.HHE. ML:1.2 0.0001255 0.42 AML other m 2021-05-02T01:53:59.17
IV.POFI.HHN. ML:0.9 0.0000612 1.58 AML other m 2021-05-02T01:54:00.97
IV.LRP.EHE. ML:1.7 0.0002845 0.22 AML other m 2021-05-02T01:54:00.88
IV.LRP.EHN. ML:1.1 0.00007694999999999999 0.68 AML other m 2021-05-02T01:54:01.91
IV.SEI.HHN. ML:2.9 0.00009495 0.42 AML other m 2021-05-02T01:54:37.33
IV.SEI.HHE. ML:2.8 0.00006455 0.42 AML other m 2021-05-02T01:54:46.88
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