Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 29-12-2020 and time 20:26:56 (UTC) in region 4 km NW Magliano de' Marsi (AQ)

A magnitude ML 1.7 earthquake occured in region: 4 km NW Magliano de' Marsi (AQ), on

  • 29-12-2020 20:26:56 (UTC)
  • 29-12-2020 21:26:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.12, 13.33 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
Magliano de' Marsi AQ 4 3690 3690
Massa d'Albe AQ 6 1476 5166
Scurcola Marsicana AQ 6 2824 7990
Tagliacozzo AQ 8 6889 14879
Sante Marie AQ 10 1166 16045
Borgorose RI 11 4591 20636
Cappadocia AQ 13 528 21164
Avezzano AQ 13 42515 63679
Castellafiume AQ 15 1106 64785
Ovindoli AQ 16 1227 66012
Pescorocchiano RI 18 2075 68087
Capistrello AQ 18 5252 73339
Rocca di Mezzo AQ 19 1526 74865
Celano AQ 19 11017 85882
Rocca di Cambio AQ 19 533 86415
Lucoli AQ 19 1011 87426
Tornimparte AQ 19 3187 90613
Pereto AQ 20 682 91295

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km S of L'Aquila (69753 inhabitants)
47 Km E of Tivoli (56533 inhabitants)
51 Km E of Guidonia Montecelio (88673 inhabitants)
66 Km NE of Velletri (53303 inhabitants)
68 Km SW of Teramo (54892 inhabitants)
74 Km E of Roma (2864731 inhabitants)
74 Km W of Chieti (51815 inhabitants)
74 Km SE of Terni (111501 inhabitants)
80 Km NE of Latina (125985 inhabitants)
81 Km SW of Montesilvano (53738 inhabitants)
81 Km NE of Aprilia (73446 inhabitants)
83 Km W of Pescara (121014 inhabitants)
84 Km NE of Pomezia (62966 inhabitants)
94 Km NE of Anzio (54211 inhabitants)
98 Km E of Fiumicino (78395 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 1.7 2020-12-29
20:26:56		 42.12 13.33 9 2021-02-26
14:56:14		 Bollettino Sismico Italiano INGV 86072971
Reviewed
Rev100 		ML 1.7 2020-12-29
20:26:56		 42.12 13.32 9 2020-12-29
20:32:44		 Sala Sismica INGV-Roma 85856701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-29 20:26:56 ± 0.05
Latitude 42.12 ± 0.00
Longitude 13.33 ± 0.00
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86072971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 335
Semi-minor axis of confidence ellipse (meter) 235
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 11
Circular confidence region, given by single value of horizontal uncertainty (meter) 330
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.64032
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 86072971
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-07 12:09:40

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 23
Type of magnitude ML
Reference to an origin 85856701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-29 20:32:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CAFI.HHZ. 2020-12-29T20:27:22.79 3.0 undecidable manual P -0.36 0
IV.LPEL.HHZ. 2020-12-29T20:27:18.26 0.3 undecidable manual S 96 0.6403 50 0.15 67
IV.BSSO.HHZ. 2020-12-29T20:27:15.11 3.0 undecidable manual P -1.81 0
IV.MTCE.HHZ. 2020-12-29T20:27:12.41 0.3 undecidable manual S 258 0.4434 50 0.12 70
IV.INTR.HHZ. 2020-12-29T20:27:11.99 0.3 undecidable manual S 104 0.4425 50 -0.27 68
IV.GIGS.HHZ. 2020-12-29T20:27:10.30 0.6 undecidable manual S 29 0.3804 50 -0.12 47
IV.T0110.HHZ. 2020-12-29T20:27:09.80 0.3 undecidable manual S 72 0.3516 50 0.24 70
IV.VVLD.HHZ. 2020-12-29T20:27:09.14 0.3 undecidable manual S 138 0.3327 50 0.13 72
IV.LPEL.HHZ. 2020-12-29T20:27:08.65 0.3 undecidable manual P 96 0.6403 50 -0.24 66
IV.GUAR.HHZ. 2020-12-29T20:27:08.94 0.6 undecidable manual S 182 0.3247 50 0.17 47
IV.GIUL.HHZ. 2020-12-29T20:27:07.73 0.3 undecidable manual P 185 0.563 50 0.16 68
IV.VCEL.EHZ. 2020-12-29T20:27:06.54 0.3 undecidable manual P 54 0.4694 50 0.57 63
MN.AQU.HNZ. 2020-12-29T20:27:06.46 0.6 undecidable manual S 14 0.2419 109 0.31 47
IV.LRP.EHZ. 2020-12-29T20:27:06.64 0.3 undecidable manual P 158 0.5099 50 -0.02 71
IV.CAMP.HHZ. 2020-12-29T20:27:05.10 0.6 undecidable manual P 8 0.4209 50 -0.03 48
IV.INTR.HHZ. 2020-12-29T20:27:05.13 0.1 undecidable manual P 104 0.4425 50 -0.38 89
IV.MTCE.HHZ. 2020-12-29T20:27:05.31 0.1 undecidable manual P 258 0.4434 50 -0.21 92
IV.FIAM.HHZ. 2020-12-29T20:27:04.97 0.6 undecidable manual S 314 0.214 111 -0.19 48
IV.GIGS.HHZ. 2020-12-29T20:27:04.34 0.6 undecidable manual P 29 0.3804 50 -0.1 48
IV.RCAV.EHZ. 2020-12-29T20:27:04.40 0.6 undecidable manual P 226 0.3921 50 -0.25 46
IT.CSO1.HGZ. 2020-12-29T20:27:04.05 0.6 undecidable manual S 264 0.1772 115 0.21 48
IV.GUAR.HHZ. 2020-12-29T20:27:03.87 0.6 undecidable manual P 182 0.3247 50 0.38 45
IV.T0110.HHZ. 2020-12-29T20:27:03.91 0.1 positive manual P 72 0.3516 50 -0.04 97
IV.VVLD.HHZ. 2020-12-29T20:27:03.50 0.1 undecidable manual P 138 0.3327 50 -0.14 95
MN.AQU.HNZ. 2020-12-29T20:27:02.08 0.6 undecidable manual P 14 0.2419 109 0.1 49
IV.FIAM.HHZ. 2020-12-29T20:27:01.15 0.1 positive manual P 314 0.214 111 -0.26 95
IV.PTQR.HHZ. 2020-12-29T20:27:01.56 0.1 undecidable manual S 150 0.1115 127 -0.11 100
IT.CSO1.HGZ. 2020-12-29T20:27:00.85 0.3 undecidable manual P 264 0.1772 115 0.2 73
IV.PTQR.HHZ. 2020-12-29T20:26:59.53 0.1 undecidable manual P 150 0.1115 127 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTQR.HHE. ML:1.9 0.00092019735 0.0896 AML other m 2020-12-29T20:27:02.40
IV.FIAM.HNN. ML:1.8 0.00035610605 0.3584 AML other m 2020-12-29T20:27:06.66
IV.FIAM.HHN. ML:1.5 0.0001865316 0.7424 AML other m 2020-12-29T20:27:08.81
IV.VVLD.HNE. ML:1.7 0.0001757696 0.1408 AML other m 2020-12-29T20:27:10.28
IV.VVLD.HHE. ML:1.7 0.0001725102 0.1408 AML other m 2020-12-29T20:27:10.28
IV.FIAM.HHE. ML:1.5 0.000182 0.44 AML other m 2020-12-29T20:27:10.55
IV.GUAR.HHE. ML:1.6 0.00013831193 0.1664 AML other m 2020-12-29T20:27:10.57
IV.T0110.HHN. ML:2.2 0.000511 0.3 AML other m 2020-12-29T20:27:11.62
IV.VVLD.HHN. ML:1.6 0.0001514682 0.3584 AML other m 2020-12-29T20:27:11.97
IV.MTCE.HHE. ML:1.6 0.000121601155 0.3328 AML other m 2020-12-29T20:27:12.69
IV.GUAR.HHN. ML:0 0.0001925 0.36 AML other m 2020-12-29T20:27:13.18
IV.INTR.HNN. ML:1.9 0.00019473905 0.4608 AML other m 2020-12-29T20:27:13.68
IV.INTR.HHN. ML:1.8 0.00016816335 0.4608 AML other m 2020-12-29T20:27:14.09
IV.INTR.HHE. ML:1.7 0.00012253725 0.32 AML other m 2020-12-29T20:27:13.41
IV.MTCE.HHN. ML:1.4 7.485E-5 0.46 AML other m 2020-12-29T20:27:14.36
IV.T0110.HHE. ML:2.1 0.000463 0.24 AML other m 2020-12-29T20:27:14.71
IV.LRP.EHE. ML:1.3 4.5481975E-5 0.2304 AML other m 2020-12-29T20:27:17.26
IV.VCEL.EHN. ML:1.9 0.00020347865 0.2688 AML other m 2020-12-29T20:27:17.31
IV.VVLD.HNN. ML:1.7 0.0001921412 0.896 AML other m 2020-12-29T20:27:10.75
IV.VCEL.EHE. ML:1.9 0.0001809555 0.4096 AML other m 2020-12-29T20:27:21.36
IV.LPEL.HHN. ML:1.6 6.307847E-5 0.1792 AML other m 2020-12-29T20:27:21.61
IV.LPEL.HHE. ML:1.8 0.000102394215 0.384 AML other m 2020-12-29T20:27:24.08
IV.PTQR.HHN. ML:1.9 0.001040152 0.192 AML other m 2020-12-29T20:27:01.66
IV.FIAM.HNE. ML:2.4 0.0014816695 1.1008 AML other m 2020-12-29T20:27:13.45
IV.LRP.EHN. ML:0.8 1.6442914E-5 0.1792 AML other m 2020-12-29T20:27:16.76
IV.LPEL.HNN. ML:2 0.00016916225 1.4976 AML other m 2020-12-29T20:27:17.52
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download