Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 27-05-2021 and time 08:36:17 (Italy) in region 4 km S Villavallelonga (AQ)

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

  • 27-05-2021 06:36:17 (UTC)
  • 27-05-2021 08:36:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.8310, 13.6190 at 16 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 4 919 919
Balsorano AQ 5 3569 4488
Collelongo AQ 7 1233 5721
San Vincenzo Valle Roveto AQ 8 2347 8068
Pescosolido FR 9 1555 9623
Campoli Appennino FR 11 1725 11348
Sora FR 12 26144 37492
Lecce nei Marsi AQ 13 1702 39194
Civita d'Antino AQ 14 979 40173
Morino AQ 14 1448 41621
Broccostella FR 14 2741 44362
Ortucchio AQ 14 1860 46222
Pescasseroli AQ 14 2203 48425
Gioia dei Marsi AQ 15 1989 50414
Bisegna AQ 15 223 50637
Trasacco AQ 16 6246 56883
Posta Fibreno FR 17 1139 58022
Isola del Liri FR 17 11715 69737
Castelliri FR 18 3454 73191
Fontechiari FR 18 1303 74494
Opi AQ 18 420 74914
Civitella Roveto AQ 19 3268 78182
Vicalvi FR 19 783 78965
Alvito FR 19 2713 81678
Luco dei Marsi AQ 19 6079 87757
San Benedetto dei Marsi AQ 20 3909 91666

Municipalities with at least 50000 inhabitants

An earthquake occurred to
61 Km SE of L'Aquila (69753 inhabitants)
69 Km E of Tivoli (56533 inhabitants)
72 Km E of Velletri (53303 inhabitants)
72 Km NE of Latina (125985 inhabitants)
74 Km SW of Chieti (51815 inhabitants)
76 Km E of Guidonia Montecelio (88673 inhabitants)
85 Km E of Aprilia (73446 inhabitants)
86 Km SW of Pescara (121014 inhabitants)
88 Km SW of Montesilvano (53738 inhabitants)
93 Km E of Anzio (54211 inhabitants)
93 Km S of Teramo (54892 inhabitants)
94 Km E of Roma (2864731 inhabitants)
94 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 1.3 2021-05-27
06:36:17		 41.8308 13.6188 16 2021-12-29
11:12:16		 Bollettino Sismico Italiano INGV 93419881
Reviewed
Rev100 		ML 1.3 2021-05-27
06:36:17		 41.8297 13.6153 17 2021-05-27
06:43:10		 Sala Sismica INGV-Roma 90526671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-27 06:36:17 ± 0.05
Latitude 41.8308 ± 0.0027
Longitude 13.6188 ± 0.0036
Depth (km) 16 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 93419881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 361
Semi-minor axis of confidence ellipse (meter) 94
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 138
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.47214
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 93419881
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-31 00:43:39

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 90526671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-27 06:43:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHZ. 2021-05-27T06:36:40.11 3.0 positive manual P 1.55 0
IV.MNTP.HNZ. 2021-05-27T06:36:40.89 3.0 undecidable manual P 0.3 0
IV.GIUL.HHZ. 2021-05-27T06:36:31.74 0.3 undecidable manual S 225 42.7239 100 0.09 70
IV.PTQR.HHZ. 2021-05-27T06:36:28.00 0.6 undecidable manual S 320 27.8499 108 0.22 47
IV.INTR.HHZ. 2021-05-27T06:36:28.62 0.3 undecidable manual S 50 30.9468 105 0.04 72
IV.LPEL.HHZ. 2021-05-27T06:36:26.86 0.3 undecidable manual P 63 52.4031 97 -0.36 66
IV.LRP.EHZ. 2021-05-27T06:36:26.02 0.3 undecidable manual S 187 20.5683 117 0.04 74
IV.GUAR.HHZ. 2021-05-27T06:36:26.96 0.3 undecidable manual S 261 25.6521 110 -0.27 70
IV.T0110.HHZ. 2021-05-27T06:36:26.24 0.3 undecidable manual P 16 46.1205 99 -0.02 71
IV.CERA.HHZ. 2021-05-27T06:36:25.93 0.3 undecidable manual P 128 42.0246 100 0.3 67
IV.GIUL.HHZ. 2021-05-27T06:36:25.66 0.3 undecidable manual P 225 42.7239 100 -0.09 70
IT.OPI.HGE. 2021-05-27T06:36:25.43 0.6 undecidable manual S 109 18.4704 120 -0.06 49
IV.POFI.HHZ. 2021-05-27T06:36:24.66 0.3 undecidable manual S 149 14.7741 128 0 75
IV.VVLD.HHZ. 2021-05-27T06:36:23.02 0.3 undecidable manual S 5 4.2957 162 -0.02 76
IV.GUAR.HHZ. 2021-05-27T06:36:23.15 0.1 undecidable manual P 261 25.6521 110 -0.04 98
IV.PTQR.HHZ. 2021-05-27T06:36:23.54 0.1 undecidable manual P 320 27.8499 108 0.03 97
IV.INTR.HHZ. 2021-05-27T06:36:23.88 0.1 undecidable manual P 50 30.9468 105 -0.09 96
IT.OPI.HGE. 2021-05-27T06:36:22.16 0.3 undecidable manual P 109 18.4704 120 -0.03 74
IV.LRP.EHZ. 2021-05-27T06:36:22.54 0.1 undecidable manual P 187 20.5683 117 0.07 98
IV.POFI.HHZ. 2021-05-27T06:36:21.74 0.1 undecidable manual P 149 14.7741 128 0.03 100
IV.VVLD.HHZ. 2021-05-27T06:36:20.88 0.1 undecidable manual P 5 4.2957 162 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.HNN. ML:1.7 0.000586 0.34 AML other m 2021-05-27T06:36:23.15
IV.VVLD.HHN. ML:1.8 0.0006504999999999999 0.36 AML other m 2021-05-27T06:36:23.15
IV.VVLD.HHE. ML:1.8 0.0007070000000000001 0.58 AML other m 2021-05-27T06:36:23.40
IV.VVLD.HNE. ML:1.8 0.0006865 0.58 AML other m 2021-05-27T06:36:23.40
IV.POFI.HHE. ML:1.1 0.00009545 0.44 AML other m 2021-05-27T06:36:25.53
IV.POFI.HHN. ML:1.0 0.00008695 1.76 AML other m 2021-05-27T06:36:26.00
IV.LRP.EHN. ML:1.2 0.00010375 0.64 AML other m 2021-05-27T06:36:26.35
IV.LRP.EHE. ML:1.6 0.0002645 0.36 AML other m 2021-05-27T06:36:26.72
IV.GUAR.HHE. ML:1.4 0.000131 0.28 AML other m 2021-05-27T06:36:27.41
IV.GUAR.HHN. ML:1.5 0.000157 0.14 AML other m 2021-05-27T06:36:28.34
IV.PTQR.HHE. ML:1.0 0.000042999999999999995 1.22 AML other m 2021-05-27T06:36:28.66
IV.INTR.HHN. ML:1.4 0.00010035 1.88 AML other m 2021-05-27T06:36:29.99
IV.INTR.HHE. ML:1.2 0.000067 1.04 AML other m 2021-05-27T06:36:30.73
IV.GIUL.HHN. ML:1.2 0.000043700000000000005 0.28 AML other m 2021-05-27T06:36:32.17
IV.GIUL.HHE. ML:1.1 0.00003895 0.36 AML other m 2021-05-27T06:36:32.17
IV.PTQR.HHN. ML:0.8 0.000029999999999999997 0.2 AML other m 2021-05-27T06:36:32.88
IV.CERA.HHE. ML:1.2 0.00004645 0.56 AML other m 2021-05-27T06:36:36.47
IV.CERA.HHN. ML:1.1 0.0000424 1.36 AML other m 2021-05-27T06:36:36.92
IV.T0110.HHN. ML:1.3 0.0000562 0.42 AML other m 2021-05-27T06:36:37.32
IV.T0110.HHE. ML:1.3 0.0000523 0.78 AML other m 2021-05-27T06:36:39.49
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