Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 20-12-2021 and time 08:57:56 (Italy) in region 6 km NE Pizzoli (AQ)

A magnitude ML 1.2 earthquake occured in region: 6 km NE Pizzoli (AQ), on

  • 20-12-2021 07:57:56 (UTC)
  • 20-12-2021 08:57:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.4670, 13.3520 at 11 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
Pizzoli AQ 6 4326 4326
Barete AQ 6 737 5063
Capitignano AQ 7 665 5728
Campotosto AQ 10 542 6270
Cagnano Amiterno AQ 10 1369 7639
Montereale AQ 11 2581 10220
Scoppito AQ 13 3727 13947
L'Aquila AQ 13 69753 83700
Crognaleto TE 14 1297 84997
Pietracamela TE 18 271 85268
Fano Adriano TE 18 296 85564
Borbona RI 19 617 86181
Amatrice RI 19 2657 88838
Lucoli AQ 20 1011 89849
Tornimparte AQ 20 3187 93036

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km N of L'Aquila (69753 inhabitants)
36 Km SW of Teramo (54892 inhabitants)
59 Km E of Terni (111501 inhabitants)
66 Km W of Montesilvano (53738 inhabitants)
68 Km W of Chieti (51815 inhabitants)
71 Km W of Pescara (121014 inhabitants)
72 Km NE of Tivoli (56533 inhabitants)
73 Km NE of Guidonia Montecelio (88673 inhabitants)
76 Km SE of Foligno (57155 inhabitants)
96 Km NE of Roma (2864731 inhabitants)
99 Km NE of Velletri (53303 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 1.2 2021-12-20
07:57:56		 42.4668 13.3522 11 2022-03-30
13:04:41		 Bollettino Sismico Italiano INGV 102180511
Reviewed
Rev100 		ML 1.3 2021-12-20
07:57:56		 42.4738 13.3453 13 2021-12-20
08:08:18		 Sala Sismica INGV-Roma 98747681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-20 07:57:56 ± 0.07
Latitude 42.4668 ± 0.0054
Longitude 13.3522 ± 0.0061
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 102180511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 620
Semi-minor axis of confidence ellipse (meter) 386
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 35
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
Number of associated phases, regardless of their use for origin computation 52
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.40559
Number of stations at which the event was observed 39
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 102180511
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-20 12:01:06

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 98747681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-20 08:08:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
MN.BNI.HHZ. 2021-12-20T07:59:37.33 3.0 negative manual Pg 22.82 0
IV.ZEN8.EHZ. 2021-12-20T07:59:31.92 3.0 undecidable manual Sn -5.55 0
CH.MUGIO.HHZ. 2021-12-20T07:59:25.48 3.0 undecidable manual Pg 22.639999 0
IV.MSRU.HHZ. 2021-12-20T07:59:25.97 3.0 undecidable manual Sn -7.42 0
IV.SBPO.HNZ. 2021-12-20T07:59:24.02 3.0 undecidable manual Sn 0.06 0
SL.LJU.BHZ. 2021-12-20T07:59:23.67 3.0 undecidable manual Sn -7.41 0
IV.SARZ.HHZ. 2021-12-20T07:59:05.79 3.0 negative manual Pg 11.41 0
IV.OSSC.HHZ. 2021-12-20T07:58:59.87 3.0 undecidable manual Sn 6.03 0
IV.RESU.HHZ. 2021-12-20T07:58:58.04 3.0 positive manual Pn 4.99 0
IV.EPOZ.HHZ. 2021-12-20T07:58:58.66 3.0 negative manual Pn 4.52 0
MN.TRI.HHZ. 2021-12-20T07:58:56.03 3.0 positive manual Pg 15.08 0
IV.IMOL.HNZ. 2021-12-20T07:58:56.72 3.0 undecidable manual Sn -5.13 0
IV.FIR.HHZ. 2021-12-20T07:58:56.03 3.0 undecidable manual Sn -1.34 0
IT.FIE.HGZ. 2021-12-20T07:58:55.32 3.0 undecidable manual Sn -2.03 0
IV.ERC.EHZ. 2021-12-20T07:58:54.64 3.0 undecidable manual Pn 5.21 0
IV.SPS2.HHZ. 2021-12-20T07:58:47.43 3.0 undecidable manual Pg 9.48 0
IV.MILZ.HHZ. 2021-12-20T07:58:46.26 3.0 undecidable manual Pn 0.03 0
IV.TDS.HHZ. 2021-12-20T07:58:41.95 3.0 undecidable manual Pg 8.2 0
IV.ARVD.HHZ. 2021-12-20T07:58:38.78 3.0 undecidable manual Sg 5.99 0
CR.STON.BHZ. 2021-12-20T07:58:38.40 3.0 positive manual Pg 7.04 0
IV.IMOL.HNZ. 2021-12-20T07:58:36.81 3.0 positive manual Pg 7.39 0
IV.ORI.HHZ. 2021-12-20T07:58:26.10 3.0 negative manual Pn -4.22 0
IT.FOPC.HGZ. 2021-12-20T07:58:25.81 3.0 undecidable manual Sn 0.7 0
IV.OSSC.HHZ. 2021-12-20T07:58:23.26 3.0 positive manual Pn -1.66 0
IV.CRTC.HHZ. 2021-12-20T07:58:20.17 3.0 undecidable manual Pg 3.52 0
IX.SFL3.HNZ.01 2021-12-20T07:58:19.34 3.0 undecidable manual Pg 2.63 0
IV.MNTT.EHZ. 2021-12-20T07:58:14.45 3.0 undecidable manual Sn -4.2 0
IV.OFFI.HHZ. 2021-12-20T07:58:14.48 3.0 undecidable manual Sn -0.84 0
IV.NRCA.HHZ. 2021-12-20T07:58:11.14 0.6 undecidable manual S 335 45.0216 50 -0.06 47
IV.GAVE.HNN. 2021-12-20T07:58:11.10 0.6 undecidable manual S 304 45.0216 50 -0.09 47
IV.VCEL.EHZ. 2021-12-20T07:58:11.04 0.6 undecidable manual S 101 40.8258 50 0.98 35
IV.FAGN.HHZ. 2021-12-20T07:58:07.51 0.6 undecidable manual S 140 29.2485 50 0.51 44
IV.LNSS.HNZ. 2021-12-20T07:58:07.11 0.6 undecidable manual S 301 29.6481 50 0.03 48
IV.TERO.HHZ. 2021-12-20T07:58:06.13 0.3 undecidable manual S 50 26.8509 50 -0.22 70
IV.VCEL.EHZ. 2021-12-20T07:58:04.14 0.3 undecidable manual P 101 40.8258 50 -0.25 68
IV.NRCA.HHZ. 2021-12-20T07:58:04.73 0.3 undecidable manual P 335 45.0216 50 -0.32 66
IV.T0110.HHZ. 2021-12-20T07:58:04.97 0.3 undecidable manual P 127 43.623 50 0.14 69
IV.SMA1.EHZ. 2021-12-20T07:58:04.09 0.6 undecidable manual S 356 18.1707 121 0.12 48
IV.GAVE.HNN. 2021-12-20T07:58:04.87 0.6 undecidable manual P 304 45.0216 50 -0.17 46
IV.GIGS.HHN. 2021-12-20T07:58:03.49 0.3 undecidable manual S 95 18.1707 121 -0.46 68
IV.RM33.EHZ. 2021-12-20T07:58:02.35 0.3 undecidable manual S 293 12.1767 131 0.07 74
IV.TERO.HHZ. 2021-12-20T07:58:02.02 0.1 undecidable manual P 50 26.8509 50 -0.23 93
IV.FAGN.HHZ. 2021-12-20T07:58:02.92 0.3 undecidable manual P 140 29.2485 50 0.3 69
MN.AQU.HNN. 2021-12-20T07:58:02.32 0.6 undecidable manual S 161 13.2756 129 -0.24 48
IV.LNSS.HNZ. 2021-12-20T07:58:02.68 0.3 undecidable manual P 301 29.6481 50 0.01 73
IV.CAMP.HHZ. 2021-12-20T07:58:01.90 0.3 undecidable manual S 31 8.9799 140 0.41 69
IV.SMA1.EHZ. 2021-12-20T07:58:00.97 0.1 undecidable manual P 356 18.1707 121 0.1 97
IV.GIGS.HHN. 2021-12-20T07:58:00.55 0.3 undecidable manual P 95 18.1707 121 -0.31 70
MN.AQU.HNN. 2021-12-20T07:57:59.85 0.3 undecidable manual P 161 13.2756 129 -0.21 72
IV.CAMP.HHZ. 2021-12-20T07:57:59.74 0.1 negative manual P 31 8.9799 140 0.3 95
IV.RM33.EHZ. 2021-12-20T07:57:59.91 0.1 undecidable manual P 293 12.1767 131 0.01 100
IV.LPEL.HHZ. 2021-12-20T07:57:55.05 3.0 negative manual P -0.76 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.HNE. ML:0.6 0.000044645815000000006 1.1328 AML other m 2021-12-20T07:57:59.20
IV.CAMP.HHN. ML:1.0 0.00013372584999999998 0.3968 AML other m 2021-12-20T07:58:02.24
IV.RM33.EHE. ML:1.1 0.00014350000000000002 0.24 AML other m 2021-12-20T07:58:02.59
IV.RM33.HNN. ML:1.1 0.000139937029 0.2368 AML other m 2021-12-20T07:58:02.81
IV.RM33.EHN. ML:1.1 0.000134457145 0.2432 AML other m 2021-12-20T07:58:02.82
IV.CAMP.HHE. ML:0.7 0.000060520425000000006 0.32 AML other m 2021-12-20T07:58:03.42
IV.SMA1.EHN. ML:1.4 0.00019350000000000001 0.34 AML other m 2021-12-20T07:58:04.96
IV.TERO.HHE. ML:1.4 0.00015072150000000002 0.4224 AML other m 2021-12-20T07:58:05.77
IV.TERO.HHN. ML:1.3 0.00009884999999999999 0.08 AML other m 2021-12-20T07:58:06.35
IV.SMA1.EHE. ML:1.1 0.00009674307 0.224 AML other m 2021-12-20T07:58:07.04
IV.FAGN.HHN. ML:1.2 0.00008367740500000001 1.68 AML other m 2021-12-20T07:58:08.97
IV.FAGN.HHE. ML:1.3 0.00010400000000000001 0.46 AML other m 2021-12-20T07:58:11.03
IV.NRCA.HHN. ML:1.2 0.000048899999999999996 0.14 AML other m 2021-12-20T07:58:11.56
IV.VCEL.EHN. ML:1.2 0.000058611629999999995 0.3584 AML other m 2021-12-20T07:58:11.76
IV.NRCA.HHE. ML:1.3 0.00006455 0.52 AML other m 2021-12-20T07:58:12.74
IV.T0110.HHN. ML:1.2 0.000053695055 0.4416 AML other m 2021-12-20T07:58:12.57
IV.VCEL.EHE. ML:1.4 0.00007461976000000001 1.616 AML other m 2021-12-20T07:58:13.97
IV.TERO.HNE. ML:1.2 0.0000952175035 0.4608 AML other m 2021-12-20T07:58:16.52
IV.NRCA.HNN. ML:2.0 0.00028426055 0.88 AML other m 2021-12-20T07:58:18.07
IV.T0110.HHE. ML:1.1 0.000035771399999999994 0.3584 AML other m 2021-12-20T07:58:18.91
IV.NRCA.HNE. ML:1.6 0.0001122537 1.328 AML other m 2021-12-20T07:58:18.33
IV.TERO.HNN. ML:1.5 0.00016086425 0.9408 AML other m 2021-12-20T07:58:22.14
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