Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 23-04-2021 and time 14:50:24 (Italy) in region 4 km E Capitignano (AQ)

A magnitude ML 1.6 earthquake occured in region: 4 km E Capitignano (AQ), on

  • 23-04-2021 12:50:24 (UTC)
  • 23-04-2021 14:50:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5150, 13.3550 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
Capitignano AQ 4 665 665
Campotosto AQ 5 542 1207
Montereale AQ 9 2581 3788
Barete AQ 9 737 4525
Pizzoli AQ 10 4326 8851
Crognaleto TE 11 1297 10148
Cagnano Amiterno AQ 12 1369 11517
Amatrice RI 14 2657 14174
Fano Adriano TE 16 296 14470
Pietracamela TE 16 271 14741
Cortino TE 17 656 15397
Scoppito AQ 18 3727 19124
Borbona RI 18 617 19741
L'Aquila AQ 18 69753 89494
Cittareale RI 20 482 89976

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km N of L'Aquila (69753 inhabitants)
33 Km W of Teramo (54892 inhabitants)
58 Km E of Terni (111501 inhabitants)
65 Km W of Montesilvano (53738 inhabitants)
69 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)
100 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 1.6 2021-04-23
12:50:24		 42.5148 13.3547 11 2021-07-12
16:55:14		 Bollettino Sismico Italiano INGV 91044591
Reviewed
Rev100 		ML 1.6 2021-04-23
12:50:24		 42.5185 13.3467 11 2021-04-23
13:00:25		 Sala Sismica INGV-Roma 89396931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-23 12:50:24 ± 0.04
Latitude 42.5148 ± 0.0036
Longitude 13.3547 ± 0.0061
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91044591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 520
Semi-minor axis of confidence ellipse (meter) 320
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 243
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 52
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 40
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.04497
Epicentral distance of station farthest from the epicenter (degree) 0.64481
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 27
Type of magnitude ML
Reference to an origin 91044591
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-10 15:41:34

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 38
Type of magnitude ML
Reference to an origin 89396931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-23 13:00:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HHZ. 2021-04-23T12:50:46.07 0.6 undecidable manual S 297 71.5728 90 0.41 42
IV.CSP1.EHZ. 2021-04-23T12:50:44.40 0.6 undecidable manual S 349 65.1903 90 0.44 43
IV.FDMO.HHZ. 2021-04-23T12:50:43.25 0.6 undecidable manual S 339 61.7937 90 0.18 45
IV.MF5.EHZ. 2021-04-23T12:50:41.00 0.6 undecidable manual S 9 53.2023 90 0.24 45
IV.ARRO.EHZ. 2021-04-23T12:50:39.28 0.6 undecidable manual S 279 48.618 90 -0.28 45
IV.VCEL.EHZ. 2021-04-23T12:50:38.01 0.6 undecidable manual S 108 41.9247 90 0.25 46
IV.MMO1.EHN. 2021-04-23T12:50:38.13 0.6 undecidable manual S 357 42.7239 90 0.16 47
IV.GAVE.EHZ. 2021-04-23T12:50:37.82 0.3 undecidable manual S 298 42.4242 90 -0.07 71
IV.NRCA.HHZ. 2021-04-23T12:50:37.37 0.6 undecidable manual S 331 40.4262 90 0.01 48
IV.MOMA.HHZ. 2021-04-23T12:50:36.51 0.3 undecidable manual P 297 71.5728 90 -0.04 68
IV.FDMO.HHZ. 2021-04-23T12:50:35.17 0.1 undecidable manual P 339 61.7937 90 0.11 91
IV.FIAM.HNN. 2021-04-23T12:50:35.01 0.6 undecidable manual S 215 33.5442 90 -0.52 44
IV.CSP1.EHZ. 2021-04-23T12:50:35.56 0.1 positive manual P 349 65.1903 90 -0.01 92
IV.MF5.EHZ. 2021-04-23T12:50:34.14 0.1 positive manual P 9 53.2023 90 0.42 87
IV.MTRA.EHZ. 2021-04-23T12:50:33.58 0.1 undecidable manual S 7 27.0507 90 -0.21 94
IV.LNSS.HHZ. 2021-04-23T12:50:33.68 0.6 undecidable manual S 291 27.4503 90 -0.22 47
IV.T0110.HHZ. 2021-04-23T12:50:33.20 0.1 undecidable manual P 132 46.8198 90 0.45 87
IV.MMO1.EHN. 2021-04-23T12:50:32.15 0.3 undecidable manual P 357 42.7239 90 0.04 72
IV.VCEL.EHZ. 2021-04-23T12:50:32.19 0.6 undecidable manual P 108 41.9247 90 0.2 46
IV.ARRO.EHZ. 2021-04-23T12:50:32.71 0.3 undecidable manual P 279 48.618 90 -0.32 67
IV.MC2.EHZ. 2021-04-23T12:50:32.65 0.3 undecidable manual P 343 46.0206 90 0.03 72
IV.TERO.HHZ. 2021-04-23T12:50:32.64 0.3 undecidable manual S 59 23.6541 90 -0.23 71
IV.NRCA.HHZ. 2021-04-23T12:50:31.65 0.1 undecidable manual P 331 40.4262 90 -0.11 94
IV.GIGS.HHZ. 2021-04-23T12:50:31.44 0.6 undecidable manual S 111 19.0698 90 -0.23 48
IV.GAVE.EHZ. 2021-04-23T12:50:31.74 0.1 undecidable manual P 298 42.4242 90 -0.33 90
MN.AQU.HNE. 2021-04-23T12:50:31.54 0.6 undecidable manual S 167 18.2706 90 0.09 49
IV.FIAM.HNN. 2021-04-23T12:50:30.56 0.3 undecidable manual P 215 33.5442 90 -0.14 72
IV.T1299.EHN. 2021-04-23T12:50:30.46 0.3 undecidable manual S 336 14.4744 90 0.02 76
IV.SMA1.EHZ. 2021-04-23T12:50:30.18 0.3 undecidable manual S 353 12.9759 100 0.16 74
IV.TERO.HHZ. 2021-04-23T12:50:29.13 0.1 positive manual P 59 23.6541 90 -0.04 98
IV.MTRA.EHZ. 2021-04-23T12:50:29.57 0.1 undecidable manual P 7 27.0507 90 -0.13 96
IV.RM33.EHZ. 2021-04-23T12:50:29.16 0.6 undecidable manual S 267 11.4774 111 -0.49 46
IV.LNSS.HHZ. 2021-04-23T12:50:29.58 0.1 undecidable manual P 291 27.4503 90 -0.18 95
MN.AQU.HNE. 2021-04-23T12:50:28.82 0.3 undecidable manual P 167 18.2706 90 0.47 68
IV.CAMP.HHN. 2021-04-23T12:50:28.30 0.6 undecidable manual S 62 4.995 148 -0.03 51
IV.GIGS.HHZ. 2021-04-23T12:50:28.40 0.1 undecidable manual P 111 19.0698 90 -0.08 99
IV.RM33.EHZ. 2021-04-23T12:50:27.20 0.1 positive manual P 267 11.4774 111 -0.11 100
IV.SMA1.EHZ. 2021-04-23T12:50:27.63 0.1 undecidable manual P 353 12.9759 100 0.11 100
IV.T1299.EHN. 2021-04-23T12:50:27.89 0.1 undecidable manual P 336 14.4744 90 0.13 99
IV.CAMP.HHN. 2021-04-23T12:50:26.75 0.1 undecidable manual P 62 4.995 148 0.2 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:1.6 0.00046027075 0.1792 AML other m 2021-04-23T12:50:29.19
IV.RM33.HNN. ML:1.6 0.00048257465 0.1728 AML other m 2021-04-23T12:50:29.19
IV.RM33.EHE. ML:1.8 0.0007723123 0.096 AML other m 2021-04-23T12:50:29.44
IV.RM33.HNE. ML:1.8 0.000764891 0.0896 AML other m 2021-04-23T12:50:29.44
IV.SMA1.EHN. ML:1.6 0.00043267830000000003 0.2752 AML other m 2021-04-23T12:50:30.78
IV.SMA1.EHE. ML:1.6 0.00045109555 0.2624 AML other m 2021-04-23T12:50:30.84
IV.TERO.HHN. ML:1.4 0.00017008695 0.0832 AML other m 2021-04-23T12:50:32.78
IV.TERO.HNE. ML:1.4 0.000151511935 0.1344 AML other m 2021-04-23T12:50:32.84
IV.TERO.HHE. ML:1.3 0.00013609205 0.1216 AML other m 2021-04-23T12:50:32.92
IV.MTRA.EHN. ML:1.7 0.00025357989999999996 0.096 AML other m 2021-04-23T12:50:33.60
IV.MTRA.HNN. ML:1.7 0.00028498544999999996 0.1216 AML other m 2021-04-23T12:50:33.60
IV.MTRA.EHE. ML:1.9 0.0003935 0.18 AML other m 2021-04-23T12:50:33.67
IV.MTRA.HNE. ML:1.8 0.0003775 0.18 AML other m 2021-04-23T12:50:33.67
IV.LNSS.HNE. ML:1.8 0.00029536975 0.1664 AML other m 2021-04-23T12:50:33.98
IV.LNSS.HHE. ML:1.7 0.00028644069999999997 0.16 AML other m 2021-04-23T12:50:33.98
IV.GAVE.EHN. ML:1.5 0.000105979175 1.744 AML other m 2021-04-23T12:50:38.05
IV.GAVE.EHE. ML:1.5 0.00009773068 0.1408 AML other m 2021-04-23T12:50:38.59
IV.T0110.HHN. ML:1.4 0.000065849135 0.4992 AML other m 2021-04-23T12:50:40.54
IV.VCEL.EHE. ML:1.5 0.00009923221500000001 0.2176 AML other m 2021-04-23T12:50:41.30
IV.VCEL.EHN. ML:1.5 0.00010818668 0.3776 AML other m 2021-04-23T12:50:41.91
IV.MF5.EHN. ML:1.5 0.00006921007 0.2176 AML other m 2021-04-23T12:50:42.93
IV.T0110.HHE. ML:1.2 0.00005059318 0.3008 AML other m 2021-04-23T12:50:43.34
IV.MF5.EHE. ML:1.6 0.00008330769499999998 1.5008 AML other m 2021-04-23T12:50:43.13
IV.FDMO.HHE. ML:1.2 0.000031299999999999995 0.22 AML other m 2021-04-23T12:50:44.52
IV.FDMO.HHN. ML:1.1 0.00002685 0.14 AML other m 2021-04-23T12:50:46.11
IV.CSP1.EHN. ML:1.5 0.00005846087 0.1856 AML other m 2021-04-23T12:50:46.77
IV.CSP1.EHE. ML:1.6 0.000071176975 0.256 AML other m 2021-04-23T12:50:48.43
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