Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 04-02-2021 and time 21:45:47 (UTC) in region 4 km SE Capitignano (AQ)

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

  • 04-02-2021 21:45:47 (UTC)
  • 04-02-2021 22:45:47 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.4930, 13.3320 at 14 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
Barete AQ 6 737 1402
Pizzoli AQ 7 4326 5728
Campotosto AQ 8 542 6270
Montereale AQ 8 2581 8851
Cagnano Amiterno AQ 10 1369 10220
Crognaleto TE 14 1297 11517
Scoppito AQ 15 3727 15244
Amatrice RI 16 2657 17901
Borbona RI 17 617 18518
L'Aquila AQ 17 69753 88271
Fano Adriano TE 18 296 88567
Pietracamela TE 19 271 88838
Posta RI 20 694 89532
Cittareale RI 20 482 90014

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km NW of L'Aquila (69753 inhabitants)
36 Km SW of Teramo (54892 inhabitants)
57 Km E of Terni (111501 inhabitants)
67 Km W of Montesilvano (53738 inhabitants)
70 Km W of Chieti (51815 inhabitants)
72 Km W of Pescara (121014 inhabitants)
73 Km SE of Foligno (57155 inhabitants)
73 Km NE of Tivoli (56533 inhabitants)
74 Km NE of Guidonia Montecelio (88673 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
Bulletin
Rev1000 		ML 1.4 2021-02-04
21:45:47		 42.4928 13.3323 14 2021-07-12
16:55:03		 Bollettino Sismico Italiano INGV 88377221
Reviewed
Rev100 		ML 1.4 2021-02-04
21:45:47		 42.4903 13.336 14 2021-02-04
22:23:50		 Sala Sismica INGV-Roma 86837441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-04 21:45:47 ± 0.07
Latitude 42.4928 ± 0.0036
Longitude 13.3323 ± 0.0061
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88377221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 450
Semi-minor axis of confidence ellipse (meter) 218
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 64
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 66
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 36
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) 0.07105
Epicentral distance of station farthest from the epicenter (degree) 0.60614
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 88377221
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-22 12:29:58

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 86837441
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-04 22:23:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2021-02-04T21:46:07.02 0.6 undecidable manual S 342 63.492 94 0.47 42
IV.MF5.EHZ. 2021-02-04T21:46:05.74 0.6 undecidable manual S 11 55.8996 94 1.22 30
IV.MC2.EHZ. 2021-02-04T21:46:02.81 0.6 undecidable manual S 346 47.9187 95 0.42 43
IV.MMO1.EHZ. 2021-02-04T21:46:01.72 0.6 undecidable manual S 359 45.1215 96 0.07 47
IV.NRCA.HHZ. 2021-02-04T21:46:00.58 0.6 undecidable manual S 335 41.7249 96 -0.19 45
IV.FAGN.HHZ. 2021-02-04T21:45:59.22 0.6 undecidable manual S 141 32.5452 99 0.89 37
IV.FIAM.HHZ. 2021-02-04T21:45:58.16 0.6 undecidable manual S 215 30.5472 100 0.35 45
IV.FDMO.HHZ. 2021-02-04T21:45:58.17 0.3 undecidable manual P 342 63.492 94 -0.17 66
IV.CSP1.EHZ. 2021-02-04T21:45:58.69 0.3 undecidable manual P 351 67.2771 93 -0.23 65
IV.MF5.EHZ. 2021-02-04T21:45:57.45 0.1 undecidable manual P 11 55.8996 94 0.29 87
IV.MTRA.EHE. 2021-02-04T21:45:57.19 0.6 undecidable manual S 10 29.748 100 -0.4 45
IV.MC2.EHZ. 2021-02-04T21:45:56.26 0.3 undecidable manual P 346 47.9187 95 0.32 66
IV.TERO.HHZ. 2021-02-04T21:45:56.35 0.6 undecidable manual S 57 26.4513 103 -0.38 45
IV.LNSS.HHZ. 2021-02-04T21:45:56.74 0.6 undecidable manual S 297 26.751 102 -0.08 48
IV.MMO1.EHZ. 2021-02-04T21:45:55.33 0.1 undecidable manual P 359 45.1215 96 -0.18 91
IV.ARRO.EHZ. 2021-02-04T21:45:55.50 0.1 undecidable manual P 282 47.3193 95 -0.35 87
IV.T0110.HHZ. 2021-02-04T21:45:55.65 0.3 undecidable manual P 129 46.7199 95 -0.1 69
IV.VCEL.EHZ. 2021-02-04T21:45:55.41 0.3 undecidable manual P 105 43.0236 96 0.22 68
MN.AQU.HNE. 2021-02-04T21:45:54.04 0.3 undecidable manual S 159 16.4724 117 -0.19 72
IV.T1299.HNN. 2021-02-04T21:45:54.24 0.6 undecidable manual S 345 16.1727 118 0.09 49
IV.GIGS.HHZ. 2021-02-04T21:45:54.77 0.3 undecidable manual S 103 20.1687 110 -0.34 70
IV.NRCA.HHZ. 2021-02-04T21:45:54.72 0.1 undecidable manual P 335 41.7249 96 -0.28 89
IV.SMA1.EHZ. 2021-02-04T21:45:54.08 0.6 undecidable manual S 1 15.2736 120 0.15 48
IV.FAGN.HHZ. 2021-02-04T21:45:53.91 0.6 undecidable manual P 141 32.5452 99 0.31 45
IV.FIAM.HHZ. 2021-02-04T21:45:53.14 0.1 undecidable manual P 215 30.5472 100 -0.14 94
IV.TERO.HHZ. 2021-02-04T21:45:52.50 0.1 undecidable manual P 57 26.4513 103 -0.17 95
IV.LNSS.HHZ. 2021-02-04T21:45:52.63 0.1 positive manual P 297 26.751 102 -0.09 95
IV.CAMP.HHN. 2021-02-04T21:45:52.47 0.6 undecidable manual S 53 7.881 144 0.01 50
IV.RM33.EHZ. 2021-02-04T21:45:52.58 0.6 undecidable manual S 281 9.7791 137 -0.21 48
IV.MTRA.EHE. 2021-02-04T21:45:52.90 0.1 undecidable manual P 10 29.748 100 -0.26 92
IV.SMA1.EHZ. 2021-02-04T21:45:51.13 0.1 negative manual P 1 15.2736 120 0.08 98
MN.AQU.HNE. 2021-02-04T21:45:51.45 0.1 undecidable manual P 159 16.4724 117 0.23 94
IV.T1299.HNN. 2021-02-04T21:45:51.28 0.1 undecidable manual P 345 16.1727 118 0.1 97
IV.GIGS.HHZ. 2021-02-04T21:45:51.57 0.1 undecidable manual P 103 20.1687 110 -0.17 96
IV.RM33.EHZ. 2021-02-04T21:45:50.40 0.1 positive manual P 281 9.7791 137 0.01 100
IV.CAMP.HHN. 2021-02-04T21:45:50.25 0.1 undecidable manual P 53 7.881 144 0.05 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:1.4 0.00026900000000000003 1.12 AML other m 2021-02-04T21:45:52.72
IV.RM33.HNE. ML:1.6 0.00035950000000000006 0.48 AML other m 2021-02-04T21:45:53.20
IV.RM33.EHE. ML:1.6 0.00036550000000000005 0.48 AML other m 2021-02-04T21:45:53.21
IV.RM33.HNN. ML:1.5 0.000303 0.68 AML other m 2021-02-04T21:45:53.48
IV.SMA1.EHE. ML:1.4 0.000216 0.34 AML other m 2021-02-04T21:45:54.99
IV.SMA1.EHN. ML:1.3 0.00014500000000000003 0.64 AML other m 2021-02-04T21:45:55.00
IV.TERO.HHN. ML:1.5 0.00016999999999999999 0.16 AML other m 2021-02-04T21:45:56.55
IV.TERO.HHE. ML:1.4 0.00014350000000000002 1.46 AML other m 2021-02-04T21:45:56.00
IV.LNSS.HHE. ML:2.0 0.00047650000000000004 0.14 AML other m 2021-02-04T21:45:57.10
IV.LNSS.HHN. ML:1.7 0.000247 0.82 AML other m 2021-02-04T21:45:57.14
IV.NRCA.HHE. ML:1.4 0.00007950000000000001 0.12 AML other m 2021-02-04T21:46:01.41
IV.NRCA.HHN. ML:1.3 0.00005965 1.5 AML other m 2021-02-04T21:46:01.13
IV.T0110.HHN. ML:1.2 0.000038400000000000005 0.44 AML other m 2021-02-04T21:46:02.63
IV.VCEL.EHE. ML:1.3 0.00006175 0.42 AML other m 2021-02-04T21:46:05.46
IV.T0110.HHE. ML:1.3 0.00004955 0.72 AML other m 2021-02-04T21:46:05.58
IV.VCEL.EHN. ML:1.3 0.00005824999999999999 0.94 AML other m 2021-02-04T21:46:06.12
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