Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 23-04-2021 and time 16:16:49 (Italy) in region 4 km E Capitignano (AQ)

A magnitude ML 1.4 earthquake occured in region: 4 km E Capitignano (AQ), on

  • 23-04-2021 14:16:49 (UTC)
  • 23-04-2021 16:16:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5130, 13.3480 at 12 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
Capitignano AQ 4 665 665
Campotosto AQ 5 542 1207
Montereale AQ 9 2581 3788
Barete AQ 9 737 4525
Pizzoli AQ 9 4326 8851
Crognaleto TE 12 1297 10148
Cagnano Amiterno AQ 12 1369 11517
Amatrice RI 14 2657 14174
Fano Adriano TE 16 296 14470
Pietracamela TE 17 271 14741
Scoppito AQ 17 3727 18468
Borbona RI 18 617 19085
Cortino TE 18 656 19741
L'Aquila AQ 18 69753 89494
Cittareale RI 19 482 89976

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km N of L'Aquila (69753 inhabitants)
34 Km W of Teramo (54892 inhabitants)
58 Km E of Terni (111501 inhabitants)
66 Km W of Montesilvano (53738 inhabitants)
70 Km W of Chieti (51815 inhabitants)
71 Km W of Pescara (121014 inhabitants)
72 Km SE of Foligno (57155 inhabitants)
76 Km NE of Tivoli (56533 inhabitants)
77 Km NE of Guidonia Montecelio (88673 inhabitants)
99 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 1.4 2021-04-23
14:16:49		 42.5128 13.3483 12 2021-07-12
16:55:14		 Bollettino Sismico Italiano INGV 91072911
Reviewed
Rev100 		ML 1.5 2021-04-23
14:16:49		 42.5003 13.3517 12 2021-04-23
14:25:34		 Sala Sismica INGV-Roma 89400501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-23 14:16:49 ± 0.04
Latitude 42.5128 ± 0.0018
Longitude 13.3483 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91072911

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 275
Semi-minor axis of confidence ellipse (meter) 128
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 227
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) 53
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.05036
Epicentral distance of station farthest from the epicenter (degree) 0.42448
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 19
Type of magnitude ML
Reference to an origin 91072911
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-11 06:40:03

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 89400501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-23 14:25:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MC2.EHZ. 2021-04-23T14:17:04.41 0.6 undecidable manual S 344 46.1205 91 0.27 45
IV.T0110.HHZ. 2021-04-23T14:17:04.26 0.6 undecidable manual S 132 47.1195 91 -0.15 46
IV.GAVE.EHZ. 2021-04-23T14:17:03.16 0.3 undecidable manual S 298 42.1245 91 0.09 70
IV.MMO1.EHZ. 2021-04-23T14:17:03.56 0.6 undecidable manual S 358 42.9237 91 0.27 45
IV.VCEL.EHZ. 2021-04-23T14:17:03.42 0.6 undecidable manual S 108 42.4242 91 0.27 45
IV.NRCA.HHZ. 2021-04-23T14:17:02.66 0.3 undecidable manual S 332 40.3263 91 0.05 71
IV.FAGN.HHZ. 2021-04-23T14:17:00.66 0.6 undecidable manual S 145 33.5442 91 -0.12 47
IV.FIAM.HHZ. 2021-04-23T14:17:00.58 0.6 undecidable manual S 215 33.1446 91 -0.09 47
IV.LNSS.HHZ. 2021-04-23T14:16:58.95 0.3 undecidable manual S 292 27.0507 92 -0.12 71
IV.T0110.HHZ. 2021-04-23T14:16:58.04 0.6 undecidable manual P 132 47.1195 91 -0.02 47
IV.TERO.HHZ. 2021-04-23T14:16:58.00 0.3 undecidable manual S 60 24.1536 92 -0.29 69
IV.MTRA.EHZ. 2021-04-23T14:16:58.86 0.3 undecidable manual S 8 27.3504 92 -0.28 69
IV.MC2.EHZ. 2021-04-23T14:16:57.95 0.1 undecidable manual P 344 46.1205 91 0.05 94
IV.GAVE.EHZ. 2021-04-23T14:16:57.12 0.1 undecidable manual P 298 42.1245 91 -0.16 91
IV.VCEL.EHZ. 2021-04-23T14:16:57.28 0.6 undecidable manual P 108 42.4242 91 -0.05 47
IV.MMO1.EHZ. 2021-04-23T14:16:57.43 0.1 undecidable manual P 358 42.9237 91 0.02 95
IV.NRCA.HHZ. 2021-04-23T14:16:57.02 0.1 undecidable manual P 332 40.3263 91 0 95
MN.AQU.HNN. 2021-04-23T14:16:56.62 0.6 undecidable manual S 165 18.2706 95 -0.08 49
IV.GIGS.HHN. 2021-04-23T14:16:56.72 0.3 undecidable manual S 110 19.5693 94 -0.33 69
IV.FAGN.HHZ. 2021-04-23T14:16:56.36 0.3 undecidable manual P 145 33.5442 91 0.4 67
IV.SMA1.EHZ. 2021-04-23T14:16:55.32 0.6 undecidable manual S 355 13.0758 108 -0.04 49
IV.T1299.HNN. 2021-04-23T14:16:55.72 0.3 undecidable manual S 338 14.4744 102 0 74
IV.FIAM.HHZ. 2021-04-23T14:16:55.91 0.1 undecidable manual P 215 33.1446 91 0.01 97
IV.TERO.HHZ. 2021-04-23T14:16:54.50 0.1 negative manual P 60 24.1536 92 -0.03 97
IV.RM33.EHZ. 2021-04-23T14:16:54.39 0.6 undecidable manual S 268 10.9779 118 -0.44 46
IV.MTRA.EHZ. 2021-04-23T14:16:54.90 0.1 positive manual P 8 27.3504 92 -0.11 95
IV.LNSS.HHZ. 2021-04-23T14:16:54.93 0.1 positive manual P 292 27.0507 92 -0.04 96
MN.AQU.HNN. 2021-04-23T14:16:54.03 0.6 undecidable manual P 165 18.2706 95 0.42 45
IV.T1299.HNN. 2021-04-23T14:16:53.25 0.1 positive manual P 338 14.4744 102 0.21 96
IV.CAMP.HHE. 2021-04-23T14:16:53.70 0.3 undecidable manual S 63 5.5944 146 -0.07 75
IV.GIGS.HHN. 2021-04-23T14:16:53.73 0.1 positive manual P 110 19.5693 94 -0.08 97
IV.SMA1.EHZ. 2021-04-23T14:16:53.00 0.1 positive manual P 355 13.0758 108 0.17 97
IV.CAMP.HHE. 2021-04-23T14:16:52.11 0.1 negative manual P 63 5.5944 146 0.19 97
IV.RM33.EHZ. 2021-04-23T14:16:52.55 0.1 positive manual P 268 10.9779 118 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.HNN. ML:1.4 0.0002557704 0.16 AML other m 2021-04-23T14:16:54.53
IV.RM33.EHN. ML:1.4 0.000249 0.16 AML other m 2021-04-23T14:16:54.54
IV.RM33.HNE. ML:1.6 0.00040797885 0.096 AML other m 2021-04-23T14:16:54.78
IV.RM33.EHE. ML:1.6 0.00041065975 0.0832 AML other m 2021-04-23T14:16:54.77
IV.SMA1.EHN. ML:1.4 0.00024971945 0.2752 AML other m 2021-04-23T14:16:56.13
IV.SMA1.EHE. ML:1.4 0.00025167529999999997 0.2624 AML other m 2021-04-23T14:16:56.18
IV.TERO.HNE. ML:1.2 0.00009543849 0.16 AML other m 2021-04-23T14:16:58.12
IV.TERO.HHN. ML:1.3 0.00011563538 0.0832 AML other m 2021-04-23T14:16:58.12
IV.TERO.HHE. ML:1.1 0.00007901468 0.1792 AML other m 2021-04-23T14:16:58.25
IV.MTRA.EHN. ML:1.4 0.00013199382999999997 0.1216 AML other m 2021-04-23T14:16:58.94
IV.MTRA.HNE. ML:1.6 0.00021492010000000002 0.096 AML other m 2021-04-23T14:16:59.01
IV.MTRA.EHE. ML:1.6 0.0002098344 0.16 AML other m 2021-04-23T14:16:59.01
IV.LNSS.HHE. ML:1.4 0.00011864527999999999 0.16 AML other m 2021-04-23T14:16:59.32
IV.LNSS.HNE. ML:1.4 0.00013158281499999998 0.16 AML other m 2021-04-23T14:16:59.32
IV.NRCA.HNE. ML:1.9 0.0002456596 0.1472 AML other m 2021-04-23T14:17:02.95
IV.NRCA.HHE. ML:1.9 0.0002565 0.14 AML other m 2021-04-23T14:17:02.95
IV.NRCA.HHN. ML:1.6 0.000125 0.14 AML other m 2021-04-23T14:17:03.29
IV.GAVE.EHN. ML:1.2 0.000056298695 0.2816 AML other m 2021-04-23T14:17:03.40
IV.GAVE.EHE. ML:1.2 0.000056686180000000005 0.2176 AML other m 2021-04-23T14:17:03.93
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