Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 27-10-2020 and time 21:59:28 (Italy) in region 6 km E Balsorano (AQ)

A magnitude ML 0.8 earthquake occured in region: 6 km E Balsorano (AQ), on

  • 27-10-2020 20:59:28 (UTC)
  • 27-10-2020 21:59:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.8060, 13.6380 at 11 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
Balsorano AQ 6 3569 3569
Pescosolido FR 6 1555 5124
Villavallelonga AQ 7 919 6043
Campoli Appennino FR 8 1725 7768
Sora FR 10 26144 33912
San Vincenzo Valle Roveto AQ 10 2347 36259
Collelongo AQ 10 1233 37492
Broccostella FR 11 2741 40233
Pescasseroli AQ 13 2203 42436
Posta Fibreno FR 13 1139 43575
Lecce nei Marsi AQ 15 1702 45277
Isola del Liri FR 15 11715 56992
Vicalvi FR 15 783 57775
Fontechiari FR 15 1303 59078
Castelliri FR 16 3454 62532
Alvito FR 16 2713 65245
Opi AQ 16 420 65665
Bisegna AQ 16 223 65888
Morino AQ 16 1448 67336
Civita d'Antino AQ 16 979 68315
Ortucchio AQ 17 1860 70175
Gioia dei Marsi AQ 17 1989 72164
Arpino FR 18 7262 79426
San Donato Val di Comino FR 18 2107 81533
Trasacco AQ 19 6246 87779

Municipalities with at least 50000 inhabitants

An earthquake occurred to
64 Km SE of L'Aquila (69753 inhabitants)
72 Km E of Tivoli (56533 inhabitants)
72 Km NE of Latina (125985 inhabitants)
73 Km E of Velletri (53303 inhabitants)
75 Km SW of Chieti (51815 inhabitants)
78 Km E of Guidonia Montecelio (88673 inhabitants)
85 Km E of Aprilia (73446 inhabitants)
87 Km SW of Pescara (121014 inhabitants)
89 Km SW of Montesilvano (53738 inhabitants)
93 Km E of Anzio (54211 inhabitants)
95 Km S of Teramo (54892 inhabitants)
95 Km E of Pomezia (62966 inhabitants)
96 Km E of Roma (2864731 inhabitants)
100 Km NW of Caserta (76326 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 0.8 2020-10-27
20:59:28		 41.8063 13.638 11 2020-10-27
22:08:20		 Sala Sismica INGV-Roma 84190811
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-27 20:59:28 ± 0.06
Latitude 41.8063 ± 0.0036
Longitude 13.6380 ± 0.0072
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 84190811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 582
Semi-minor axis of confidence ellipse (meter) 341
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 69
Circular confidence region, given by single value of horizontal uncertainty (meter) 580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 121
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.06385
Epicentral distance of station farthest from the epicenter (degree) 0.37861
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 84190811
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-27 22:08:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIUL.HHE. 2020-10-27T20:59:42.64 0.6 undecidable manual S 229 42.0246 50 0.21 46
IV.INTR.HHZ. 2020-10-27T20:59:39.62 0.6 undecidable manual S 44 31.6461 50 -0.04 49
IV.GIUL.HHE. 2020-10-27T20:59:36.56 0.1 undecidable manual P 229 42.0246 50 -0.07 94
IV.LRP.EHZ. 2020-10-27T20:59:36.08 0.3 undecidable manual S 194 18.1707 50 0.02 75
IV.INTR.HHZ. 2020-10-27T20:59:35.05 0.1 undecidable manual P 44 31.6461 50 0.01 97
IV.CERA.HNN. 2020-10-27T20:59:35.72 0.6 undecidable manual P 126 39.0276 50 -0.46 44
IT.OPI.HGE. 2020-10-27T20:59:35.37 0.6 undecidable manual S 102 16.2726 124 -0.16 50
IV.POFI.HHZ. 2020-10-27T20:59:34.26 0.3 undecidable manual S 148 11.5773 133 -0.01 76
IV.VVLD.HHZ. 2020-10-27T20:59:33.13 0.3 undecidable manual S 350 7.0929 147 -0.13 73
IT.OPI.HGE. 2020-10-27T20:59:32.72 0.1 undecidable manual P 102 16.2726 124 0.06 98
IV.POFI.HHZ. 2020-10-27T20:59:32.08 0.1 undecidable manual P 148 11.5773 133 0.15 98
IV.LRP.EHZ. 2020-10-27T20:59:32.98 0.1 undecidable manual P 194 18.1707 50 0.02 100
IV.VVLD.HHZ. 2020-10-27T20:59:31.56 0.1 negative manual P 350 7.0929 147 0.22 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.HHE. ML:0.7 0.0000669 0.76 AML other m 2020-10-27T20:59:33.20
IV.VVLD.HHN. ML:0.8 0.00007950000000000001 0.36 AML other m 2020-10-27T20:59:33.42
IV.LRP.EHN. ML:0.5 0.000025750000000000002 0.46 AML other m 2020-10-27T20:59:36.16
IV.LRP.EHE. ML:1.1 0.0000922 0.84 AML other m 2020-10-27T20:59:36.26
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