Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 23-02-2021 and time 13:02:02 (Italy) in region 2 km SW Villetta Barrea (AQ)

A magnitude ML 1.4 earthquake occured in region: 2 km SW Villetta Barrea (AQ), on

  • 23-02-2021 12:02:02 (UTC)
  • 23-02-2021 13:02:02 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.7650, 13.9070 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
Villetta Barrea AQ 2 653 653
Civitella Alfedena AQ 3 296 949
Opi AQ 7 420 1369
Barrea AQ 7 726 2095
San Donato Val di Comino FR 10 2107 4202
Pescasseroli AQ 11 2203 6405
Alfedena AQ 11 864 7269
Scontrone AQ 11 574 7843
Settefrati FR 11 728 8571
Picinisco FR 13 1218 9789
Montenero Val Cocchiara IS 14 538 10327
Gallinaro FR 15 1269 11596
Pizzone IS 15 329 11925
Scanno AQ 16 1847 13772
Alvito FR 16 2713 16485
San Biagio Saracinisco FR 17 349 16834
Castel di Sangro AQ 17 6538 23372
Roccaraso AQ 17 1627 24999
Villa Latina FR 18 1241 26240
Castel San Vincenzo IS 18 516 26756
Rivisondoli AQ 18 700 27456
Atina FR 18 4316 31772
Campoli Appennino FR 19 1725 33497
Posta Fibreno FR 19 1139 34636
Vicalvi FR 19 783 35419
Pescocostanzo AQ 19 1128 36547
Rocca Pia AQ 20 178 36725
Villalago AQ 20 568 37293

Municipalities with at least 50000 inhabitants

An earthquake occurred to
69 Km SW of Chieti (51815 inhabitants)
78 Km SE of L'Aquila (69753 inhabitants)
82 Km SW of Pescara (121014 inhabitants)
85 Km NW of Caserta (76326 inhabitants)
86 Km S of Montesilvano (53738 inhabitants)
90 Km E of Latina (125985 inhabitants)
91 Km N of Aversa (53047 inhabitants)
94 Km E of Velletri (53303 inhabitants)
94 Km E of Tivoli (56533 inhabitants)
96 Km N of Giugliano in Campania (122974 inhabitants)
99 Km NW of Acerra (59573 inhabitants)
99 Km N of Marano di Napoli (59874 inhabitants)
99 Km NW of Afragola (65057 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 2021-02-23
12:02:02		 41.7648 13.9073 12 2021-07-12
16:55:06		 Bollettino Sismico Italiano INGV 89266671
Reviewed
Rev100 		ML 1.4 2021-02-23
12:02:02		 41.7618 13.9047 12 2021-02-23
12:17:22		 Sala Sismica INGV-Roma 87408451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-23 12:02:02 ± 0.08
Latitude 41.7648 ± 0.0045
Longitude 13.9073 ± 0.0048
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 89266671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 478
Semi-minor axis of confidence ellipse (meter) 147
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 12
Circular confidence region, given by single value of horizontal uncertainty (meter) 480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.05846
Epicentral distance of station farthest from the epicenter (degree) 0.52970
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 89266671
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-19 17:45:43

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 87408451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-23 12:17:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIUL.HHZ. 2021-02-23T12:02:20.91 0.6 undecidable manual S 247 58.7967 91 0.45 42
IV.T0110.HHZ. 2021-02-23T12:02:19.54 0.6 undecidable manual S 348 52.6029 91 0.71 38
IV.LPEL.HHZ. 2021-02-23T12:02:15.10 0.3 undecidable manual S 36 38.7279 92 0 72
IV.MIDA.HHZ. 2021-02-23T12:02:13.19 0.3 undecidable manual S 115 31.8459 93 -0.08 72
IV.GIUL.HHZ. 2021-02-23T12:02:12.72 0.3 undecidable manual P 247 58.7967 91 -0.07 69
IV.LRP.EHZ. 2021-02-23T12:02:12.86 0.6 undecidable manual S 244 29.6481 93 0.18 47
IV.T0110.HHZ. 2021-02-23T12:02:11.80 0.3 undecidable manual P 348 52.6029 91 -0.05 70
IV.RNI2.HHZ. 2021-02-23T12:02:11.49 0.6 undecidable manual S 109 21.4674 97 0.98 37
IV.VVLD.HHZ. 2021-02-23T12:02:11.60 0.6 undecidable manual S 296 26.1516 94 -0.17 48
IV.VAGA.HHZ. 2021-02-23T12:02:11.28 0.6 undecidable manual P 145 47.3193 92 0.25 45
IV.INTR.HHZ. 2021-02-23T12:02:11.90 0.6 undecidable manual S 360 27.3504 94 -0.19 48
IV.CERA.HHZ. 2021-02-23T12:02:10.01 0.6 undecidable manual S 154 20.6682 97 -0.3 46
IV.POFI.HHZ. 2021-02-23T12:02:09.34 0.3 undecidable manual S 252 16.9719 102 0 75
IV.LPEL.HHZ. 2021-02-23T12:02:09.55 0.3 undecidable manual P 36 38.7279 92 -0.15 70
IV.LRP.EHZ. 2021-02-23T12:02:08.18 0.1 undecidable manual P 244 29.6481 93 -0.12 96
IV.MIDA.HHZ. 2021-02-23T12:02:08.30 0.1 undecidable manual P 115 31.8459 93 -0.34 91
IV.INTR.HHZ. 2021-02-23T12:02:07.89 0.1 positive manual P 360 27.3504 94 -0.06 98
IV.RNI2.HHZ. 2021-02-23T12:02:07.33 0.1 positive manual P 109 21.4674 97 0.28 94
IV.VVLD.HHZ. 2021-02-23T12:02:07.60 0.1 undecidable manual P 296 26.1516 94 -0.18 96
IV.POFI.HHZ. 2021-02-23T12:02:06.35 0.1 positive manual P 252 16.9719 102 -0.02 100
IV.CERA.HHZ. 2021-02-23T12:02:06.74 0.1 undecidable manual P 154 20.6682 97 -0.2 95
IT.OPI.HGZ. 2021-02-23T12:02:06.94 0.6 undecidable manual S 281 6.4935 143 -0.03 51
IT.OPI.HGZ. 2021-02-23T12:02:05.11 0.1 undecidable manual P 281 6.4935 143 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.POFI.HHN. ML:1.0 0.00007694999999999999 0.62 AML other m 2021-02-23T12:02:09.66
IV.POFI.HHE. ML:1.0 0.0000802 0.7 AML other m 2021-02-23T12:02:09.57
IV.CERA.HHE. ML:1.2 0.0001045 1.24 AML other m 2021-02-23T12:02:10.94
IV.CERA.HHN. ML:1.2 0.000115 0.38 AML other m 2021-02-23T12:02:11.37
IV.RNI2.HHE. ML:1.9 0.00047299999999999995 0.56 AML other m 2021-02-23T12:02:12.39
IV.RNI2.HNE. ML:1.8 0.000438 0.56 AML other m 2021-02-23T12:02:12.39
IV.RNI2.HNN. ML:1.7 0.00034250000000000003 0.14 AML other m 2021-02-23T12:02:12.18
IV.RNI2.HHN. ML:1.7 0.000357 0.14 AML other m 2021-02-23T12:02:12.18
IV.VVLD.HHE. ML:1.4 0.00015200000000000004 0.78 AML other m 2021-02-23T12:02:12.13
IV.INTR.HHN. ML:1.5 0.000155 0.38 AML other m 2021-02-23T12:02:12.79
IV.VVLD.HHN. ML:1.5 0.000187 1.46 AML other m 2021-02-23T12:02:12.12
IV.MIDA.HHN. ML:1.5 0.0001395 0.38 AML other m 2021-02-23T12:02:13.63
IV.LRP.EHE. ML:1.2 0.00007764999999999999 0.64 AML other m 2021-02-23T12:02:13.99
IV.LRP.EHN. ML:0.9 0.00003485 1.8 AML other m 2021-02-23T12:02:14.06
IV.MIDA.HHE. ML:1.5 0.0001435 0.38 AML other m 2021-02-23T12:02:14.08
IV.INTR.HHE. ML:1.4 0.000125 1.7 AML other m 2021-02-23T12:02:14.14
IV.LPEL.HHE. ML:1.6 0.00014450000000000002 0.18 AML other m 2021-02-23T12:02:16.75
IV.LPEL.HHN. ML:1.5 0.00011125000000000001 0.78 AML other m 2021-02-23T12:02:17.89
IV.T0110.HHE. ML:1.5 0.0000762 1.3 AML other m 2021-02-23T12:02:21.85
IV.T0110.HHN. ML:1.3 0.0000518 0.2 AML other m 2021-02-23T12:02:21.50
IV.GIUL.HHN. ML:1.0 0.000017678714000000002 0.1984 AML other m 2021-02-23T12:02:21.74
IV.GIUL.HHE. ML:0.9 0.000015659295 0.1024 AML other m 2021-02-23T12:02:21.82
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