Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 28-10-2020 and time 20:27:25 (Italy) in region San Demetrio ne' Vestini (AQ)

A magnitude ML 1.6 earthquake occured in region: San Demetrio ne' Vestini (AQ), on

  • 28-10-2020 19:27:25 (UTC)
  • 28-10-2020 20:27:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.2850, 13.5600 at 9 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
San Demetrio ne' Vestini AQ 0 1854 1854
Villa Sant'Angelo AQ 2 424 2278
Sant'Eusanio Forconese AQ 3 394 2672
Fagnano Alto AQ 4 418 3090
Prata d'Ansidonia AQ 4 496 3586
Poggio Picenze AQ 4 1136 4722
Barisciano AQ 5 1828 6550
Fossa AQ 6 721 7271
Fontecchio AQ 7 369 7640
Ocre AQ 7 1167 8807
Rocca di Cambio AQ 8 533 9340
San Pio delle Camere AQ 8 661 10001
Rocca di Mezzo AQ 9 1526 11527
Santo Stefano di Sessanio AQ 10 111 11638
Caporciano AQ 10 230 11868
Carapelle Calvisio AQ 10 87 11955
Tione degli Abruzzi AQ 11 310 12265
Castelvecchio Calvisio AQ 11 153 12418
Calascio AQ 12 137 12555
Navelli AQ 15 554 13109
L'Aquila AQ 15 69753 82862
Castel del Monte AQ 16 413 83275
Ovindoli AQ 17 1227 84502
Ofena AQ 17 506 85008
Capestrano AQ 17 884 85892
Secinaro AQ 18 359 86251
Acciano AQ 18 327 86578
Lucoli AQ 18 1011 87589
Villa Santa Lucia degli Abruzzi AQ 19 123 87712
Collepietro AQ 20 237 87949

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km SE of L'Aquila (69753 inhabitants)
43 Km S of Teramo (54892 inhabitants)
51 Km W of Chieti (51815 inhabitants)
55 Km W of Montesilvano (53738 inhabitants)
57 Km W of Pescara (121014 inhabitants)
72 Km NE of Tivoli (56533 inhabitants)
76 Km E of Guidonia Montecelio (88673 inhabitants)
81 Km E of Terni (111501 inhabitants)
93 Km NE of Velletri (53303 inhabitants)
99 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
Bulletin
Rev1000 		ML 1.6 2020-10-28
19:27:25		 42.2852 13.5597 9 2021-02-26
14:56:03		 Bollettino Sismico Italiano INGV 84499581
Reviewed
Rev100 		ML 1.6 2020-10-28
19:27:25		 42.2828 13.5633 10 2020-10-28
19:33:29		 Sala Sismica INGV-Roma 84219901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-28 19:27:25 ± 0.07
Latitude 42.2852 ± 0.0036
Longitude 13.5597 ± 0.0073
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84499581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 593
Semi-minor axis of confidence ellipse (meter) 274
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 66
Circular confidence region, given by single value of horizontal uncertainty (meter) 590.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.02608
Epicentral distance of station farthest from the epicenter (degree) 0.68259
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 84499581
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-11 16:27:25

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 84219901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-28 19:33:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NRCA.HHZ. 2020-10-28T19:27:47.34 0.3 undecidable manual S 329 70.8735 50 0.31 64
IV.MTRA.EHE. 2020-10-28T19:27:42.66 0.6 undecidable manual S 346 54.0015 50 0.13 46
IV.INTR.HHZ. 2020-10-28T19:27:39.41 0.6 undecidable manual S 137 41.5251 50 0.2 46
IV.MC2.EHZ. 2020-10-28T19:27:38.56 0.3 undecidable manual P 337 75.7686 50 0.04 67
IV.RM33.EHZ. 2020-10-28T19:27:38.52 0.6 undecidable manual S 311 37.629 50 0.37 45
IV.SMA1.EHZ. 2020-10-28T19:27:38.68 0.6 undecidable manual S 334 42.5241 50 -0.77 39
IV.NRCA.HHZ. 2020-10-28T19:27:37.60 0.1 undecidable manual P 329 70.8735 50 -0.17 88
IV.TERO.HHN. 2020-10-28T19:27:37.71 0.6 undecidable manual S 6 37.629 50 -0.45 44
IV.PTQR.HHZ. 2020-10-28T19:27:36.48 0.3 undecidable manual S 204 32.0457 105 -0.13 71
IV.VCEL.EHZ. 2020-10-28T19:27:35.51 0.6 undecidable manual S 62 26.0517 108 0.88 38
IV.CAMP.HHZ. 2020-10-28T19:27:35.78 0.3 undecidable manual S 336 30.4473 106 -0.3 69
IV.MTRA.EHE. 2020-10-28T19:27:35.20 0.3 undecidable manual P 346 54.0015 50 0.04 70
IV.SMA1.EHZ. 2020-10-28T19:27:33.12 0.3 undecidable manual P 334 42.5241 50 -0.27 68
IV.T1299.HNN. 2020-10-28T19:27:33.77 0.3 undecidable manual P 330 44.9217 50 0.01 71
IV.INTR.HHZ. 2020-10-28T19:27:33.30 0.3 undecidable manual P 137 41.5251 50 0.05 71
IV.VVLD.HHZ. 2020-10-28T19:27:33.97 0.3 undecidable manual P 174 46.4202 50 -0.02 71
IV.RM33.EHZ. 2020-10-28T19:27:32.67 0.3 undecidable manual P 311 37.629 50 0.03 72
IV.TERO.HHN. 2020-10-28T19:27:32.28 0.3 undecidable manual P 6 37.629 50 -0.36 67
IV.T0110.HHZ. 2020-10-28T19:27:32.07 0.3 undecidable manual S 109 18.87 115 -0.22 71
IV.GIGS.HHN. 2020-10-28T19:27:32.01 0.3 undecidable manual S 3 18.6702 115 -0.24 71
IV.PTQR.HHZ. 2020-10-28T19:27:31.71 0.3 undecidable manual P 204 32.0457 105 -0.04 73
IV.VCEL.EHZ. 2020-10-28T19:27:31.03 0.3 undecidable manual P 62 26.0517 108 0.43 68
IV.CAMP.HHZ. 2020-10-28T19:27:31.36 0.1 undecidable manual P 336 30.4473 106 -0.09 96
MN.AQU.HNN. 2020-10-28T19:27:31.73 0.3 undecidable manual S 301 14.7741 120 0.67 63
IV.GIGS.HHN. 2020-10-28T19:27:29.27 0.1 undecidable manual P 3 18.6702 115 0.04 99
IV.T0110.HHZ. 2020-10-28T19:27:29.71 0.3 undecidable manual P 109 18.87 115 0.45 68
MN.AQU.HNN. 2020-10-28T19:27:29.06 0.3 undecidable manual P 301 14.7741 120 0.52 67
IV.FAGN.HHZ. 2020-10-28T19:27:27.58 0.3 undecidable manual S 137 2.8971 161 -0.69 64
IV.FAGN.HHZ. 2020-10-28T19:27:26.81 0.1 undecidable manual P 137 2.8971 161 -0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.T0110.HHE. ML:1.9 0.0007204999999999999 0.52 AML other m 2020-10-28T19:27:36.52
IV.T0110.HHN. ML:2.0 0.0007875 0.98 AML other m 2020-10-28T19:27:37.46
IV.PTQR.HHE. ML:1.3 0.0001009 0.42 AML other m 2020-10-28T19:27:38.00
IV.CAMP.HHN. ML:1.5 0.0001445 0.5 AML other m 2020-10-28T19:27:38.87
IV.CAMP.HHE. ML:1.5 0.00014549999999999999 0.6 AML other m 2020-10-28T19:27:39.60
IV.RM33.EHE. ML:1.6 0.00014150000000000002 0.78 AML other m 2020-10-28T19:27:42.70
IV.VCEL.EHN. ML:1.8 0.00040649999999999996 1.4 AML other m 2020-10-28T19:27:42.11
IV.VCEL.EHE. ML:1.9 0.000453 0.6 AML other m 2020-10-28T19:27:42.51
IV.RM33.EHN. ML:1.5 0.00011845 0.88 AML other m 2020-10-28T19:27:42.44
IV.PTQR.HHN. ML:1.3 0.00009635 1.14 AML other m 2020-10-28T19:27:42.39
IV.VVLD.HHE. ML:1.4 0.0000668 0.42 AML other m 2020-10-28T19:27:43.50
IV.INTR.HHN. ML:1.8 0.00022700000000000002 1.28 AML other m 2020-10-28T19:27:43.96
IV.INTR.HHE. ML:1.7 0.0001585 0.62 AML other m 2020-10-28T19:27:44.61
IV.VVLD.HHN. ML:1.4 0.0000706 0.46 AML other m 2020-10-28T19:27:47.02
IV.NRCA.HHN. ML:1.5 0.00004995 0.5 AML other m 2020-10-28T19:27:47.74
IV.NRCA.HHE. ML:1.6 0.00006975 0.68 AML other m 2020-10-28T19:27:48.35
IV.SMA1.EHE. ML:1.7 0.000148 0.5 AML other m 2020-10-28T19:27:48.85
IV.SMA1.EHN. ML:1.6 0.000126 1.54 AML other m 2020-10-28T19:27:49.20
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