Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 23-12-2020 and time 17:30:25 (UTC) in region 5 km SE Cittareale (RI)

A magnitude ML 1.6 earthquake occured in region: 5 km SE Cittareale (RI), on

  • 23-12-2020 17:30:25 (UTC)
  • 23-12-2020 18:30:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.5830, 13.1880 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
Cittareale RI 5 482 482
Montereale AQ 8 2581 3063
Borbona RI 9 617 3680
Amatrice RI 10 2657 6337
Posta RI 10 694 7031
Capitignano AQ 12 665 7696
Accumoli RI 14 667 8363
Cagnano Amiterno AQ 14 1369 9732
Campotosto AQ 15 542 10274
Barete AQ 17 737 11011
Micigliano RI 18 127 11138
Leonessa RI 18 2435 13573
Pizzoli AQ 19 4326 17899

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of L'Aquila (69753 inhabitants)
43 Km W of Teramo (54892 inhabitants)
44 Km E of Terni (111501 inhabitants)
57 Km SE of Foligno (57155 inhabitants)
75 Km NE of Guidonia Montecelio (88673 inhabitants)
76 Km NE of Tivoli (56533 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
84 Km W of Chieti (51815 inhabitants)
85 Km W of Pescara (121014 inhabitants)
87 Km SE of Perugia (166134 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
96 Km NE 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 2020-12-23
17:30:25		 42.5832 13.1883 11 2021-02-26
14:56:14		 Bollettino Sismico Italiano INGV 86207971
Reviewed
Rev100 		ML 1.5 2020-12-23
17:30:25		 42.5825 13.1853 11 2020-12-23
17:40:43		 Sala Sismica INGV-Roma 85656851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-23 17:30:25 ± 0.05
Latitude 42.5832 ± 0.0018
Longitude 13.1883 ± 0.0037
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86207971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 266
Semi-minor axis of confidence ellipse (meter) 119
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 260
Circular confidence region, given by single value of horizontal uncertainty (meter) 270.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 39
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) 0.60165
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 47
Type of magnitude ML
Reference to an origin 86207971
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-12 18:19:52

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 38
Type of magnitude ML
Reference to an origin 85656851
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-23 17:40:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HHZ. 2020-12-23T17:30:43.60 0.1 undecidable manual S 296 55.9995 50 0.54 81
IV.CSP1.EHZ. 2020-12-23T17:30:43.40 0.1 undecidable manual S 1 56.3991 50 0.23 87
IV.CESI.HHZ. 2020-12-23T17:30:42.10 0.1 undecidable manual S 334 52.2033 50 0.07 91
IV.FDMO.HHZ. 2020-12-23T17:30:41.90 0.1 undecidable manual S 351 50.9157 50 0.19 88
IV.ASSB.HHZ. 2020-12-23T17:30:37.28 0.1 undecidable manual P 320 66.7776 50 -0.04 90
IV.FIAM.HHZ. 2020-12-23T17:30:37.60 0.1 undecidable manual S 189 35.4423 50 0.04 95
IV.MMO1.EHZ. 2020-12-23T17:30:37.80 0.1 undecidable manual S 18 36.8298 50 -0.14 95
IV.MNTT.EHZ. 2020-12-23T17:30:37.59 3.0 negative manual P 0.55 0
IV.GIGS.HHE. 2020-12-23T17:30:37.00 0.1 undecidable manual S 115 34.6431 50 -0.34 91
IV.MC2.EHZ. 2020-12-23T17:30:37.90 0.1 undecidable manual S 0 36.4413 50 0.08 93
IV.ARRO.EHZ. 2020-12-23T17:30:37.10 0.1 undecidable manual S 269 34.5432 50 -0.22 92
IV.TERO.HHZ. 2020-12-23T17:30:36.70 0.1 undecidable manual S 82 34.2435 50 -0.54 88
IV.T0110.HHZ. 2020-12-23T17:30:36.58 0.1 undecidable manual P 129 62.0934 50 -0.03 91
IV.VCEL.EHZ. 2020-12-23T17:30:36.14 0.1 undecidable manual P 111 57.2982 50 0.28 86
IV.NRCA.HHZ. 2020-12-23T17:30:35.10 0.1 undecidable manual S 348 28.4493 50 -0.59 87
IV.MOMA.HHZ. 2020-12-23T17:30:35.68 0.1 undecidable manual P 296 55.9995 50 0.01 92
IV.MF5.EHN. 2020-12-23T17:30:35.06 0.1 undecidable manual P 26 50.0166 50 0.32 87
IV.GUMA.HHZ. 2020-12-23T17:30:35.72 0.1 undecidable manual P 13 54.501 50 0.29 87
IV.CSP1.EHZ. 2020-12-23T17:30:35.57 0.1 positive manual P 1 56.3991 50 -0.16 90
IV.CESI.HHZ. 2020-12-23T17:30:34.94 0.1 undecidable manual P 334 52.2033 50 -0.13 91
IV.GAVE.EHZ. 2020-12-23T17:30:34.80 0.1 undecidable manual S 297 26.8509 50 -0.48 89
IV.FDMO.HHZ. 2020-12-23T17:30:34.79 0.1 undecidable manual P 351 50.9157 50 -0.09 92
IV.MTRA.EHZ. 2020-12-23T17:30:34.40 0.1 undecidable manual S 41 25.6521 50 -0.56 89
IV.MMO1.EHZ. 2020-12-23T17:30:32.54 0.1 positive manual P 18 36.8298 50 -0.17 93
IV.CAMP.HHZ. 2020-12-23T17:30:32.90 0.1 undecidable manual S 106 18.7701 120 -0.17 96
IV.GIGS.HHE. 2020-12-23T17:30:32.14 0.1 negative manual P 115 34.6431 50 -0.22 93
IV.MC2.EHZ. 2020-12-23T17:30:32.55 0.1 positive manual P 0 36.4413 50 -0.09 95
IV.ARRO.EHZ. 2020-12-23T17:30:32.30 0.1 positive manual P 269 34.5432 50 -0.05 95
IV.FIAM.HHZ. 2020-12-23T17:30:32.56 0.1 positive manual P 189 35.4423 50 0.07 95
IV.TERO.HHZ. 2020-12-23T17:30:32.18 0.1 undecidable manual P 82 34.2435 50 -0.12 95
IV.GAVE.EHZ. 2020-12-23T17:30:31.05 0.1 negative manual P 297 26.8509 50 -0.12 95
IV.SMA1.EHZ. 2020-12-23T17:30:31.60 0.1 undecidable manual S 66 13.0758 129 0.17 98
IV.NRCA.HHZ. 2020-12-23T17:30:31.26 0.1 positive manual P 348 28.4493 50 -0.15 95
IV.LNSS.HHZ. 2020-12-23T17:30:31.30 0.1 undecidable manual S 280 12.2766 131 0.09 99
IV.T1299.HNE. 2020-12-23T17:30:30.60 0.1 undecidable manual S 54 9.4794 138 0.07 100
IV.MTRA.EHZ. 2020-12-23T17:30:30.80 0.1 positive manual P 41 25.6521 50 -0.19 95
IV.SMA1.EHZ. 2020-12-23T17:30:29.31 0.1 positive manual P 66 13.0758 129 0.36 94
IV.LNSS.HHZ. 2020-12-23T17:30:29.07 0.1 negative manual P 280 12.2766 131 0.25 97
IV.CAMP.HHZ. 2020-12-23T17:30:29.95 0.1 negative manual P 106 18.7701 120 0.06 98
IV.T1299.HNE. 2020-12-23T17:30:28.74 0.1 positive manual P 54 9.4794 138 0.31 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:0.0 0.0010807452 0.256 AML other m 2020-12-23T17:30:31.53
IV.LNSS.HNE. ML:0.0 0.001046368 0.2432 AML other m 2020-12-23T17:30:31.54
IV.LNSS.HHN. ML:0.0 0.0006063282 0.128 AML other m 2020-12-23T17:30:31.65
IV.LNSS.HNN. ML:0.0 0.0005841461 0.1152 AML other m 2020-12-23T17:30:31.67
IV.SMA1.EHN. ML:0.0 0.0016358689 1.8208 AML other m 2020-12-23T17:30:31.97
IV.SMA1.EHE. ML:0.0 0.0012879042000000002 1.8336 AML other m 2020-12-23T17:30:32.94
IV.CAMP.HHE. ML:0.0 0.000112642355 0.2944 AML other m 2020-12-23T17:30:33.31
IV.MTRA.HNN. ML:0.0 0.00016601032999999997 0.128 AML other m 2020-12-23T17:30:34.53
IV.MTRA.EHN. ML:0.0 0.00015632635 0.1152 AML other m 2020-12-23T17:30:34.55
IV.MTRA.EHE. ML:0.0 0.00022095684999999998 0.2432 AML other m 2020-12-23T17:30:34.80
IV.MTRA.HNE. ML:0.0 0.00021797975 0.2304 AML other m 2020-12-23T17:30:34.80
IV.GAVE.HNE. ML:0.0 0.00021949469999999998 0.2048 AML other m 2020-12-23T17:30:35.00
IV.GAVE.EHE. ML:0.0 0.00020818515 0.2176 AML other m 2020-12-23T17:30:35.11
IV.GAVE.EHN. ML:0.0 0.0002780943 0.256 AML other m 2020-12-23T17:30:35.29
IV.NRCA.HHE. ML:0.0 0.0009077964 0.128 AML other m 2020-12-23T17:30:35.53
IV.NRCA.HNE. ML:0.0 0.00087022625 0.128 AML other m 2020-12-23T17:30:35.60
IV.CAMP.HHN. ML:0.0 0.0001148767 0.3328 AML other m 2020-12-23T17:30:35.81
IV.NRCA.HHN. ML:0.0 0.00051169975 0.1152 AML other m 2020-12-23T17:30:35.70
IV.NRCA.HNN. ML:0.0 0.0005053856 0.1152 AML other m 2020-12-23T17:30:35.71
IV.TERO.HHN. ML:0.0 0.00023459555 0.192 AML other m 2020-12-23T17:30:36.90
IV.TERO.HNN. ML:0.0 0.00029803685 0.192 AML other m 2020-12-23T17:30:36.90
IV.TERO.HHE. ML:0.0 0.00019678395 0.1792 AML other m 2020-12-23T17:30:36.90
IV.TERO.HNE. ML:0.0 0.000215481 0.1152 AML other m 2020-12-23T17:30:37.14
IV.ARRO.EHN. ML:0.0 0.00011041067 0.1792 AML other m 2020-12-23T17:30:37.79
IV.ARRO.EHE. ML:0.0 0.00009329299500000001 0.1408 AML other m 2020-12-23T17:30:38.20
IV.FIAM.HHN. ML:0.0 0.000032054945 0.1792 AML other m 2020-12-23T17:30:38.16
IV.FIAM.HHE. ML:0.0 0.00004547202 0.2816 AML other m 2020-12-23T17:30:38.73
IV.FIAM.HNN. ML:0.0 0.00014656415 0.4992 AML other m 2020-12-23T17:30:39.66
IV.GAVE.HNN. ML:0.0 0.0001736945 0.6912 AML other m 2020-12-23T17:30:43.18
IV.FDMO.HHE. ML:0.0 0.000051978545 0.1664 AML other m 2020-12-23T17:30:43.64
IV.CSP1.EHN. ML:1.6 0.00009358245 0.2432 AML other m 2020-12-23T17:30:43.77
IV.GUMA.HHE. ML:0.0 0.00024665645 1.5776 AML other m 2020-12-23T17:30:43.85
IV.CSP1.EHE. ML:0.0 0.000140875325 0.32 AML other m 2020-12-23T17:30:44.50
IV.FDMO.HHN. ML:0.0 0.000054429735 0.1408 AML other m 2020-12-23T17:30:44.58
IV.GUMA.HHN. ML:0.0 0.00017793375 0.448 AML other m 2020-12-23T17:30:44.58
IV.CESI.HHN. ML:0.0 0.00007369637500000001 0.2432 AML other m 2020-12-23T17:30:44.72
IV.CESI.HHE. ML:0.0 0.000045280909999999996 0.3072 AML other m 2020-12-23T17:30:44.74
IV.MOMA.HHN. ML:0.0 0.000053129285 0.1792 AML other m 2020-12-23T17:30:44.81
IV.MOMA.HHE. ML:0.0 0.000067390565 0.1408 AML other m 2020-12-23T17:30:45.41
IV.VCEL.EHN. ML:0.0 0.000042853325 0.1408 AML other m 2020-12-23T17:30:46.50
IV.FIAM.HNE. ML:2.6 0.0014553989999999998 0.1248 AML other m 2020-12-23T17:30:48.50
IV.ASSB.HHN. ML:0.0 0.000035047465 0.1792 AML other m 2020-12-23T17:30:48.63
IV.ASSB.HHE. ML:1.2 0.00002897968 0.1792 AML other m 2020-12-23T17:30:48.63
IV.VCEL.EHE. ML:0.0 0.00004529268 0.2432 AML other m 2020-12-23T17:30:48.68
IV.T0110.HHE. ML:0.0 0.000026866719999999996 0.2688 AML other m 2020-12-23T17:30:49.32
IV.T0110.HHN. ML:0.0 0.000029321630000000003 0.32 AML other m 2020-12-23T17:30:51.21
IV.CESI.HNE. ML:1.9 0.0002080314 1.4848 AML other m 2020-12-23T17:30:43.33
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