Earthquake with magnitude of ML 0.9 on date 16-04-2021 and time 20:11:22 (UTC) in region 4 km S Celano (AQ)

A magnitude ML 0.9 earthquake occured in region: 4 km S Celano (AQ), on

  • 16-04-2021 20:11:22 (UTC)
  • 16-04-2021 22:11:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.0460, 13.5440 at 16 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Celano AQ 5 11017 11017
Cerchio AQ 5 1635 12652
Aielli AQ 6 1475 14127
Collarmele AQ 7 894 15021
San Benedetto dei Marsi AQ 8 3909 18930
Trasacco AQ 10 6246 25176
Avezzano AQ 10 42515 67691
Pescina AQ 10 4133 71824
Ovindoli AQ 10 1227 73051
Luco dei Marsi AQ 11 6079 79130
Ortucchio AQ 13 1860 80990
Massa d'Albe AQ 14 1476 82466
Capistrello AQ 15 5252 87718
Magliano de' Marsi AQ 16 3690 91408
Canistro AQ 16 995 92403
Gagliano Aterno AQ 16 254 92657
Gioia dei Marsi AQ 16 1989 94646
Ortona dei Marsi AQ 16 542 95188
Secinaro AQ 16 359 95547
Scurcola Marsicana AQ 17 2824 98371
Lecce nei Marsi AQ 17 1702 100073
Civitella Roveto AQ 17 3268 103341
Collelongo AQ 18 1233 104574
Castel di Ieri AQ 18 303 104877
Castelvecchio Subequo AQ 18 982 105859
Rocca di Mezzo AQ 18 1526 107385
Castellafiume AQ 18 1106 108491
Civita d'Antino AQ 19 979 109470
Cocullo AQ 19 230 109700
Tione degli Abruzzi AQ 19 310 110010
Goriano Sicoli AQ 19 569 110579
Molina Aterno AQ 20 386 110965

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SE of L'Aquila (69753 inhabitants)
62 Km SW of Chieti (51815 inhabitants)
62 Km E of Tivoli (56533 inhabitants)
68 Km E of Guidonia Montecelio (88673 inhabitants)
70 Km S of Teramo (54892 inhabitants)
72 Km SW of Montesilvano (53738 inhabitants)
72 Km SW of Pescara (121014 inhabitants)
75 Km NE of Velletri (53303 inhabitants)
83 Km NE of Latina (125985 inhabitants)
89 Km E of Roma (2864731 inhabitants)
90 Km NE of Aprilia (73446 inhabitants)
93 Km SE of Terni (111501 inhabitants)
96 Km E of Pomezia (62966 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 2021-04-16
20:11:22
42.0457 13.5442 16 2021-07-12
16:55:08
Bollettino Sismico Italiano INGV 89527041
Reviewed
Rev100
ML 0.9 2021-04-16
20:11:22
42.0457 13.5412 16 2021-04-16
20:15:46
Sala Sismica INGV-Roma 89156921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-16 20:11:22 ± 0.17
Latitude 42.0457 ± 0.0045
Longitude 13.5442 ± 0.0073
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89527041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 534
Semi-minor axis of confidence ellipse (meter) 373
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 128
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.30487
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 89527041
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-27 13:29:14

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 89156921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-16 20:15:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTRJ.HNZ. 2021-04-16T20:11:41.68 3.0 undecidable manual Pg 0.01 0
IV.INTR.HHZ. 2021-04-16T20:11:33.30 0.6 undecidable manual S 97 29.9478 106 0.24 46
IV.T0110.HHZ. 2021-04-16T20:11:32.56 0.3 undecidable manual S 43 27.9498 107 0.02 72
IV.FAGN.HHZ. 2021-04-16T20:11:31.80 0.3 undecidable manual S 8 24.6531 111 0.09 71
IV.VVLD.HHZ. 2021-04-16T20:11:30.34 1.0 undecidable manual S 161 20.5683 116 -0.37 23
IV.GUAR.HNN. 2021-04-16T20:11:29.19 3.0 undecidable manual P 33.8439 0.05 0
IV.PTQR.HHZ. 2021-04-16T20:11:28.85 0.1 undecidable manual S 257 12.0768 135 -0.01 100
IV.T0110.HHZ. 2021-04-16T20:11:28.08 0.3 undecidable manual P 43 27.9498 107 -0.19 71
IV.INTR.HHZ. 2021-04-16T20:11:28.72 0.1 undecidable manual P 97 29.9478 106 0.16 94
IV.VVLD.HHZ. 2021-04-16T20:11:27.18 0.1 undecidable manual P 161 20.5683 116 -0.03 98
IV.FAGN.HHZ. 2021-04-16T20:11:27.67 0.1 undecidable manual P 8 24.6531 111 -0.11 98
IV.PTQR.HHZ. 2021-04-16T20:11:26.24 0.1 undecidable manual P 257 12.0768 135 0.1 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTQR.HHE. ML:0.9 0.0000648 0.12 AML other m 2021-04-16T20:11:29.06
IV.PTQR.HHN. ML:0.9 0.00006755 0.24 AML other m 2021-04-16T20:11:29.14
IV.VVLD.HHE. ML:0.7 0.00003204999999999999 0.42 AML other m 2021-04-16T20:11:30.90
IV.VVLD.HHN. ML:0.7 0.00003125 0.48 AML other m 2021-04-16T20:11:30.99
IV.FAGN.HHE. ML:1.0 0.0000596 0.58 AML other m 2021-04-16T20:11:32.63
IV.FAGN.HHN. ML:1.0 0.00005005 0.3 AML other m 2021-04-16T20:11:33.61
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