Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 28-12-2023 and time 20:17:51 (UTC) in region 1 km S Cittareale (RI)

A magnitude ML 1.0 earthquake occured in region: 1 km S Cittareale (RI), on

  • 28-12-2023 20:17:51 (UTC)
  • 28-12-2023 21:17:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6060, 13.1630 at 14 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
Cittareale RI 1 482 482
Posta RI 11 694 1176
Borbona RI 11 617 1793
Amatrice RI 11 2657 4450
Montereale AQ 11 2581 7031
Accumoli RI 12 667 7698
Capitignano AQ 15 665 8363
Leonessa RI 17 2435 10798
Cagnano Amiterno AQ 17 1369 12167
Cascia PG 18 3217 15384
Campotosto AQ 18 542 15926
Monteleone di Spoleto PG 18 599 16525
Micigliano RI 19 127 16652
Barete AQ 20 737 17389

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NW of L'Aquila (69753 inhabitants)
43 Km E of Terni (111501 inhabitants)
45 Km W of Teramo (54892 inhabitants)
54 Km SE of Foligno (57155 inhabitants)
76 Km NE of Guidonia Montecelio (88673 inhabitants)
77 Km NE of Tivoli (56533 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
84 Km SE of Perugia (166134 inhabitants)
87 Km W of Chieti (51815 inhabitants)
88 Km W of Pescara (121014 inhabitants)
89 Km E of Viterbo (67173 inhabitants)
97 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
Reviewed
Rev100 		ML 1.0 2023-12-28
20:17:51		 42.6065 13.1628 14 2023-12-28
20:27:08		 Sala Sismica INGV-Roma 124330181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-12-28 20:17:51 ± 0.12
Latitude 42.6065 ± 0.0072
Longitude 13.1628 ± 0.0049
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 124330181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 608
Semi-minor axis of confidence ellipse (meter) 580
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 191
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32466
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 23
Type of magnitude ML
Reference to an origin 124330181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-12-28 20:27:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PIEI.HHZ. 2023-12-28T20:18:25.05 3.0 undecidable manual S -4.07 0
IV.CESI.HHZ. 2023-12-28T20:18:14.51 3.0 undecidable manual S 0
IV.CESI.HHZ. 2023-12-28T20:18:07.29 3.0 undecidable manual P 0
IV.SNTG.HHZ. 2023-12-28T20:18:06.16 3.0 undecidable manual P -0.09 0
IV.TERO.HHZ. 2023-12-28T20:18:03.68 0.6 undecidable manual S 87 36.0417 97 -0.3 46
IV.ARRO.EHZ. 2023-12-28T20:18:02.63 0.6 undecidable manual S 265 32.5452 98 -0.43 45
IV.NRCA.HHZ. 2023-12-28T20:18:00.96 0.6 undecidable manual S 351 25.4523 102 -0.24 47
IV.GAVE.HNN. 2023-12-28T20:18:00.65 0.6 undecidable manual S 294 23.8539 104 -0.14 48
IV.MTRA.HNE. 2023-12-28T20:18:00.85 0.6 undecidable manual S 49 25.3524 102 -0.3 47
IV.SMA1.EHZ. 2023-12-28T20:17:58.50 0.6 undecidable manual S 79 14.2746 121 0.09 50
IV.TERO.HHZ. 2023-12-28T20:17:58.83 1.0 undecidable manual P 87 36.0417 97 -0.03 24
IV.ARRO.EHZ. 2023-12-28T20:17:58.58 1.0 positive manual P 265 32.5452 98 0.25 23
IV.MTRA.HNE. 2023-12-28T20:17:57.33 0.1 undecidable manual P 49 25.3524 102 0.1 97
IV.LNSS.HHZ. 2023-12-28T20:17:57.36 0.1 undecidable manual S 268 9.9789 135 -0.14 99
IV.NRCA.HHZ. 2023-12-28T20:17:57.27 0.1 positive manual P 351 25.4523 102 0.02 99
IV.RM33.EHZ. 2023-12-28T20:17:57.58 0.6 undecidable manual S 159 11.5773 129 -0.24 49
IV.GAVE.HNN. 2023-12-28T20:17:57.47 0.1 undecidable manual P 294 23.8539 104 0.45 90
IV.RM33.EHZ. 2023-12-28T20:17:55.41 1.0 undecidable manual P 159 11.5773 129 0.11 25
IV.SMA1.EHZ. 2023-12-28T20:17:55.97 0.6 negative manual P 79 14.2746 121 0.33 47
IV.LNSS.HHZ. 2023-12-28T20:17:55.20 0.1 undecidable manual P 268 9.9789 135 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:0.9 0.00006951083 0.0896 AML other m 2023-12-28T20:17:57.82
IV.RM33.EHN. ML:0.7 0.00004517836999999999 0.1408 AML other m 2023-12-28T20:17:57.93
IV.SMA1.EHN. ML:1.1 0.00011555000000000002 0.28 AML other m 2023-12-28T20:17:58.93
IV.SMA1.EHE. ML:1.2 0.0001496 1.72 AML other m 2023-12-28T20:17:58.92
IV.NRCA.HHE. ML:1.1 0.00006475 0.12 AML other m 2023-12-28T20:18:01.07
IV.NRCA.HHN. ML:0.9 0.00004264999999999999 0.1 AML other m 2023-12-28T20:18:01.78
IV.TERO.HHN. ML:0.6 0.0000143546635 0.0768 AML other m 2023-12-28T20:18:04.44
IV.TERO.HHE. ML:0.6 0.0000127186571 0.1408 AML other m 2023-12-28T20:18:04.57
IV.LNSS.HHE. ML:1.2 0.0001797301 0.1408 AML other m 2023-12-28T20:17:57.53
IV.LNSS.HHN. ML:0.9 0.00007332350499999999 0.192 AML other m 2023-12-28T20:17:57.55
IV.LNSS.HNE. ML:1.2 0.000168187655 0.128 AML other m 2023-12-28T20:17:57.47
IV.LNSS.HNN. ML:1.2 0.00014819300000000002 0.96 AML other m 2023-12-28T20:17:54.64
IV.RM33.HNE. ML:1.0 0.00009823076499999999 0.2816 AML other m 2023-12-28T20:17:57.95
IV.RM33.HNN. ML:0.9 0.00007240983499999999 0.5632 AML other m 2023-12-28T20:17:58.14
IV.NRCA.HNE. ML:1.2 0.000093025635 0.5248 AML other m 2023-12-28T20:18:01.20
IV.NRCA.HNN. ML:1.6 0.00022541135 0.7296 AML other m 2023-12-28T20:18:07.50
IV.ARRO.EHE. ML:0.4 0.0000079312845 0.1536 AML other m 2023-12-28T20:18:05.33
IV.ARRO.EHN. ML:0.4 0.000009294207499999999 0.256 AML other m 2023-12-28T20:18:04.37
IV.TERO.HNE. ML:1.4 0.000086121085 1.1264 AML other m 2023-12-28T20:18:05.86
IV.MF5.EHE. ML:1.4 0.000062681465 0.32 AML other m 2023-12-28T20:18:08.07
IV.MF5.EHN. ML:1.3 0.000052855520000000004 0.4992 AML other m 2023-12-28T20:18:08.43
IV.MMO1.EHE. ML:1.0 0.000040241766999999994 0.1152 AML other m 2023-12-28T20:18:10.49
IV.MMO1.EHN. ML:1.0 0.000035073615000000004 0.1792 AML other m 2023-12-28T20:18:11.24
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