Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 22-01-2023 and time 16:29:21 (Italy) in region 4 km N Amatrice (RI)

A magnitude ML 0.9 earthquake occured in region: 4 km N Amatrice (RI), on

  • 22-01-2023 15:29:21 (UTC)
  • 22-01-2023 16:29:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6640, 13.2880 at 11 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
Amatrice RI 4 2657 2657
Accumoli RI 5 667 3324
Cittareale RI 12 482 3806
Arquata del Tronto AP 12 1178 4984
Campotosto AQ 14 542 5526
Acquasanta Terme AP 15 2916 8442
Montereale AQ 16 2581 11023
Capitignano AQ 16 665 11688
Cortino TE 19 656 12344
Valle Castellana TE 19 977 13321
Rocca Santa Maria TE 20 537 13858

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km W of Teramo (54892 inhabitants)
36 Km N of L'Aquila (69753 inhabitants)
54 Km E of Terni (111501 inhabitants)
58 Km SE of Foligno (57155 inhabitants)
73 Km W of Montesilvano (53738 inhabitants)
79 Km W of Pescara (121014 inhabitants)
80 Km W of Chieti (51815 inhabitants)
87 Km NE of Guidonia Montecelio (88673 inhabitants)
88 Km NE of Tivoli (56533 inhabitants)
88 Km SE of Perugia (166134 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 0.9 2023-01-22
15:29:21		 42.664 13.2883 11 2023-01-22
15:58:44		 Sala Sismica INGV-Roma 113732991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-01-22 15:29:21 ± 0.09
Latitude 42.6640 ± 0.0045
Longitude 13.2883 ± 0.0073
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 113732991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 600
Semi-minor axis of confidence ellipse (meter) 450
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 252
Circular confidence region, given by single value of horizontal uncertainty (meter) 600.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 0.23562
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 113732991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-01-22 15:58:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
7F.SIB1.EHZ. 2023-01-22T15:29:31.02 0.3 undecidable manual S 357 25.6521 90 0.31 69
IV.TERO.HHZ. 2023-01-22T15:29:30.27 0.6 undecidable manual S 100 26.1516 90 -0.58 43
IV.NRCA.HHZ. 2023-01-22T15:29:29.76 0.6 undecidable manual S 323 23.5542 90 -0.39 46
IV.LNSS.HHZ. 2023-01-22T15:29:29.68 0.3 undecidable manual S 252 21.3675 90 0.11 74
IV.CAMP.HHZ. 2023-01-22T15:29:28.30 0.6 undecidable manual S 145 17.2716 90 -0.19 48
7F.SIB1.EHZ. 2023-01-22T15:29:26.84 0.1 undecidable manual P 357 25.6521 90 0.06 97
IV.LNSS.HHZ. 2023-01-22T15:29:26.25 0.1 undecidable manual P 252 21.3675 90 0.13 98
IV.NRCA.HHZ. 2023-01-22T15:29:26.37 1.0 undecidable manual P 323 23.5542 90 -0.09 24
IV.TERO.HHZ. 2023-01-22T15:29:26.62 0.1 undecidable manual P 100 26.1516 90 -0.24 94
IV.CAMP.HHZ. 2023-01-22T15:29:25.52 0.1 undecidable manual P 145 17.2716 90 0.02 100
IV.SMA1.EHZ. 2023-01-22T15:29:25.65 0.6 undecidable manual S 134 5.2947 146 -0.03 51
IV.SMA1.EHZ. 2023-01-22T15:29:24.24 0.1 undecidable manual P 134 5.2947 146 0.36 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.1 0.00019800000000000002 0.56 AML other m 2023-01-22T15:29:26.36
IV.SMA1.EHE. ML:1.2 0.000248 1.04 AML other m 2023-01-22T15:29:26.12
IV.NRCA.HHE. ML:1.2 0.00008840000000000001 1.18 AML other m 2023-01-22T15:29:30.71
IV.NRCA.HHN. ML:1.1 0.0000843 0.08 AML other m 2023-01-22T15:29:30.57
IV.CAMP.HHE. ML:0.8 0.00005190243 0.1792 AML other m 2023-01-22T15:29:28.54
IV.CAMP.HHN. ML:0.6 0.000027912924999999997 0.2432 AML other m 2023-01-22T15:29:28.51
IV.LNSS.HHE. ML:0.9 0.00005131276649999999 0.0896 AML other m 2023-01-22T15:29:30.04
IV.LNSS.HHN. ML:0.8 0.000044505605 0.1408 AML other m 2023-01-22T15:29:29.91
IV.TERO.HHE. ML:0.8 0.00003405768 0.1408 AML other m 2023-01-22T15:29:30.52
IV.TERO.HHN. ML:0.7 0.000029546805 0.3584 AML other m 2023-01-22T15:29:30.87
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