Earthquake with magnitude of ML 1.4 on date 23-02-2021 and time 13:02:02 (Italy) in region 3 km SW Villetta Barrea (AQ)

A magnitude ML 1.4 earthquake occured in region: 3 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) 41.76, 13.9 at 12 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Villetta Barrea AQ 3 653 653
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
Settefrati FR 11 728 7133
Alfedena AQ 11 864 7997
Scontrone AQ 11 574 8571
Picinisco FR 13 1218 9789
Gallinaro FR 14 1269 11058
Montenero Val Cocchiara IS 14 538 11596
Pizzone IS 15 329 11925
Alvito FR 16 2713 14638
Scanno AQ 16 1847 16485
San Biagio Saracinisco FR 17 349 16834
Castel di Sangro AQ 17 6538 23372
Villa Latina FR 17 1241 24613
Roccaraso AQ 17 1627 26240
Castel San Vincenzo IS 18 516 26756
Atina FR 18 4316 31072
Rivisondoli AQ 18 700 31772
Posta Fibreno FR 19 1139 32911
Campoli Appennino FR 19 1725 34636
Vicalvi FR 19 783 35419
Pescocostanzo AQ 20 1128 36547

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)
84 Km NW of Caserta (76326 inhabitants)
86 Km S of Montesilvano (53738 inhabitants)
89 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)
100 Km NW of Casoria (77642 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.4 2021-02-23
12:02:02
41.76 13.9 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 ± 0.09
Latitude 41.76 ± 0.00
Longitude 13.90 ± 0.01
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87408451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 506
Semi-minor axis of confidence ellipse (meter) 184
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 174
Circular confidence region, given by single value of horizontal uncertainty (meter) 510
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 22
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
Epicentral distance of station farthest from the epicenter (degree) 0.5261
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 11
Magnitude information

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 Takeoff_angle Residual Weight
IV.MTMR.EHZ. 2021-02-23T12:02:41.11 3.0 undecidable manual S 0.08 0
IV.PTRJ.HNZ. 2021-02-23T12:02:23.51 3.0 undecidable manual S -1.27 0
IV.GIUL.HHZ. 2021-02-23T12:02:20.80 0.6 undecidable manual S 247 0.5261 91 0.39 42
IV.T0110.HHZ. 2021-02-23T12:02:19.87 0.6 undecidable manual S 349 0.4766 91 0.92 36
IV.LPEL.HHZ. 2021-02-23T12:02:15.41 0.3 undecidable manual S 36 0.3525 92 0.16 70
IV.MIDA.HHZ. 2021-02-23T12:02:13.28 0.3 undecidable manual S 115 0.2869 93 -0.04 72
IV.LRP.EHZ. 2021-02-23T12:02:12.86 0.6 undecidable manual S 244 0.2635 94 0.23 46
IV.T0110.HHZ. 2021-02-23T12:02:12.09 1.0 negative manual P 349 0.4766 91 0.16 23
IV.GIUL.HHZ. 2021-02-23T12:02:12.77 0.6 positive manual P 247 0.5261 91 -0.01 46
IV.VVLD.HHZ. 2021-02-23T12:02:11.60 0.6 undecidable manual S 297 0.2356 95 -0.2 47
IV.INTR.HHZ. 2021-02-23T12:02:11.90 0.6 undecidable manual S 360 0.2491 94 -0.32 45
IV.RNI2.HHZ. 2021-02-23T12:02:11.52 0.6 undecidable manual S 107 0.1934 97 0.95 37
IV.CERA.HHZ. 2021-02-23T12:02:10.01 0.6 undecidable manual S 153 0.1844 98 -0.29 47
IV.POFI.HHZ. 2021-02-23T12:02:09.34 0.3 undecidable manual S 253 0.1502 104 0.04 74
IV.LPEL.HHZ. 2021-02-23T12:02:09.59 0.3 negative manual P 36 0.3525 92 -0.21 68
IV.MIDA.HHZ. 2021-02-23T12:02:08.30 0.1 undecidable manual P 115 0.2869 93 -0.38 89
IV.LRP.EHZ. 2021-02-23T12:02:08.19 0.3 positive manual P 244 0.2635 94 -0.1 72
IV.RNI2.HHZ. 2021-02-23T12:02:07.33 0.1 positive manual P 107 0.1934 97 0.23 94
IV.VVLD.HHZ. 2021-02-23T12:02:07.60 0.1 undecidable manual P 297 0.2356 95 -0.21 93
IV.INTR.HHZ. 2021-02-23T12:02:07.89 0.1 positive manual P 360 0.2491 94 -0.16 94
IT.OPI.HGZ. 2021-02-23T12:02:06.94 0.6 undecidable manual S 285 0.0576 144 -0.06 50
IV.POFI.HHZ. 2021-02-23T12:02:06.35 0.1 positive manual P 253 0.1502 104 -0.02 99
IV.CERA.HHZ. 2021-02-23T12:02:06.79 1.0 undecidable manual P 153 0.1844 98 -0.15 24
IT.OPI.HGZ. 2021-02-23T12:02:05.11 0.1 undecidable manual P 285 0.0576 144 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.POFI.HHN. ML:1 7.695E-5 0.62 AML other m 2021-02-23T12:02:09.66
IV.POFI.HHE. ML:1 8.02E-5 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 0.000473 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.HHN. ML:1.7 0.000357 0.14 AML other m 2021-02-23T12:02:12.18
IV.RNI2.HNN. ML:1.7 0.0003425 0.14 AML other m 2021-02-23T12:02:12.18
IV.VVLD.HHE. ML:1.4 0.000152 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 7.765E-5 0.64 AML other m 2021-02-23T12:02:13.99
IV.LRP.EHN. ML:0.9 3.485E-5 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 0.0001445 0.18 AML other m 2021-02-23T12:02:16.75
IV.LPEL.HHN. ML:1.5 0.00011125 0.78 AML other m 2021-02-23T12:02:17.89
IV.T0110.HHE. ML:1.5 7.62E-5 1.3 AML other m 2021-02-23T12:02:21.85
IV.T0110.HHN. ML:1.3 5.18E-5 0.2 AML other m 2021-02-23T12:02:21.50
IV.GIUL.HHE. ML:0.8 1.5659295E-5 0.1024 AML other m 2021-02-23T12:02:21.82
IV.GIUL.HHN. ML:1 1.7678714E-5 0.1984 AML other m 2021-02-23T12:02:21.74
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download