Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 21-02-2023 and time 09:34:52 (Italy) in region 5 km SE Cittareale (RI)

A magnitude ML 0.9 earthquake occured in region: 5 km SE Cittareale (RI), on

  • 21-02-2023 08:34:52 (UTC)
  • 21-02-2023 09:34:52 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.5740, 13.1830 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 8 617 3680
Posta RI 9 694 4374
Amatrice RI 11 2657 7031
Capitignano AQ 11 665 7696
Cagnano Amiterno AQ 13 1369 9065
Accumoli RI 15 667 9732
Campotosto AQ 16 542 10274
Barete AQ 16 737 11011
Micigliano RI 17 127 11138
Pizzoli AQ 18 4326 15464
Leonessa RI 18 2435 17899
Antrodoco RI 19 2588 20487

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NW of L'Aquila (69753 inhabitants)
44 Km W of Teramo (54892 inhabitants)
44 Km E of Terni (111501 inhabitants)
58 Km SE of Foligno (57155 inhabitants)
74 Km NE of Guidonia Montecelio (88673 inhabitants)
75 Km NE of Tivoli (56533 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
85 Km W of Chieti (51815 inhabitants)
85 Km W of Pescara (121014 inhabitants)
88 Km SE of Perugia (166134 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
95 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 0.9 2023-02-21
08:34:52		 42.5738 13.1833 11 2024-03-01
17:17:59		 Bollettino Sismico Italiano INGV 115626101
Reviewed
Rev100 		ML 0.8 2023-02-21
08:34:52		 42.5757 13.1845 11 2023-02-21
08:44:16		 Sala Sismica INGV-Roma 114655921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-21 08:34:52 ± 0.06
Latitude 42.5738 ± 0.0054
Longitude 13.1833 ± 0.0049
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 115626101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 566
Semi-minor axis of confidence ellipse (meter) 368
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 192
Circular confidence region, given by single value of horizontal uncertainty (meter) 570.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.50092
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 115626101
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-03-22 11:57:14

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 114655921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-21 08:44:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EPOZ.HHZ. 2023-02-21T08:36:17.60 3.0 negative manual Pg 15.4 0
IV.SPS2.HHZ. 2023-02-21T08:36:03.40 3.0 undecidable manual Pg 14.85 0
IV.GRI.EHZ. 2023-02-21T08:35:50.01 3.0 undecidable manual Pn -4.22 0
GU.CANO.HHZ. 2023-02-21T08:35:50.23 3.0 negative manual Pg 15.13 0
IV.MELA.HHZ. 2023-02-21T08:35:43.15 3.0 undecidable manual Sn -0.64 0
IV.SACR.HNZ. 2023-02-21T08:35:42.65 3.0 undecidable manual Sn 0.28 0
OX.SABO.HNZ. 2023-02-21T08:35:41.91 3.0 undecidable manual Pg 10.31 0
OX.AGOR.HHZ. 2023-02-21T08:35:35.50 3.0 undecidable manual Pn 0.58 0
IV.GIUL.HHZ. 2023-02-21T08:35:07.33 3.0 negative manual Pg 0.72 0
7F.SIB1.EHE. 2023-02-21T08:35:05.26 0.6 undecidable manual S 11 36.2415 90 0.17 47
IV.TERO.HHZ. 2023-02-21T08:35:04.47 0.3 undecidable manual S 81 34.743 90 -0.22 70
IV.GUMA.HHZ. 2023-02-21T08:35:03.13 0.6 undecidable manual P 13 55.5999 90 0.19 45
IV.NRCA.HHZ. 2023-02-21T08:35:02.90 0.3 undecidable manual S 349 29.3484 90 -0.34 69
IV.GAVE.EHN. 2023-02-21T08:35:02.59 0.6 undecidable manual S 299 26.9508 90 -0.03 49
IV.MC2.EHZ. 2023-02-21T08:35:00.37 0.1 undecidable manual P 1 37.4292 90 0.23 92
7F.SIB1.EHE. 2023-02-21T08:34:59.92 0.1 undecidable manual P 11 36.2415 90 -0.04 96
IV.SMA1.EHZ. 2023-02-21T08:34:59.15 0.3 undecidable manual S 63 13.875 96 0.03 75
IV.TERO.HHZ. 2023-02-21T08:34:59.50 0.3 undecidable manual P 81 34.743 90 -0.23 70
MN.AQU.HNN. 2023-02-21T08:34:59.50 0.6 undecidable manual P 143 30.4473 90 0.44 45
IV.NRCA.HHZ. 2023-02-21T08:34:59.13 0.6 undecidable manual P 349 29.3484 90 0.24 47
IV.LNSS.HHZ. 2023-02-21T08:34:58.58 0.3 undecidable manual S 285 12.0768 108 -0.08 75
IV.GAVE.EHN. 2023-02-21T08:34:58.33 0.1 undecidable manual P 299 26.9508 90 -0.2 95
IV.RM33.EHZ. 2023-02-21T08:34:57.42 0.3 undecidable manual S 161 7.6812 133 -0.22 73
IV.LNSS.HHZ. 2023-02-21T08:34:56.36 0.1 positive manual P 285 12.0768 108 0.11 99
IV.SMA1.EHZ. 2023-02-21T08:34:56.57 0.3 undecidable manual P 63 13.875 96 0.05 75
IV.RM33.EHZ. 2023-02-21T08:34:55.76 0.1 undecidable manual P 161 7.6812 133 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:1.1 0.00015849999999999998 0.24 AML other m 2023-02-21T08:34:57.63
IV.RM33.EHE. ML:0.9 0.00011649999999999999 1.16 AML other m 2023-02-21T08:34:57.68
IV.LNSS.HHE. ML:1.0 0.000111 0.3 AML other m 2023-02-21T08:34:58.94
IV.LNSS.HHN. ML:0.9 0.000092 0.2 AML other m 2023-02-21T08:34:58.80
IV.SMA1.EHE. ML:1.2 0.000143 0.54 AML other m 2023-02-21T08:34:59.61
IV.SMA1.EHN. ML:0.6 0.0000365 0.52 AML other m 2023-02-21T08:34:59.38
IV.NRCA.HHE. ML:0.7 0.0000252 0.96 AML other m 2023-02-21T08:35:03.09
IV.NRCA.HHN. ML:0.5 0.000016400000000000002 1.58 AML other m 2023-02-21T08:35:07.20
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