Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 21-05-2014 and time 18:59:20 (UTC) in region 5 km SW Civitella Alfedena (AQ)

A magnitude ML 0.8 earthquake occured in region: 5 km SW Civitella Alfedena (AQ), on

  • 21-05-2014 18:59:20 (UTC)
  • 21-05-2014 20:59:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7310, 13.9060 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Civitella Alfedena AQ 5 296 296
Villetta Barrea AQ 6 653 949
Barrea AQ 8 726 1675
Settefrati FR 8 728 2403
San Donato Val di Comino FR 8 2107 4510
Opi AQ 8 420 4930
Picinisco FR 10 1218 6148
Alfedena AQ 11 864 7012
Scontrone AQ 11 574 7586
Gallinaro FR 12 1269 8855
Pizzone IS 13 329 9184
Pescasseroli AQ 13 2203 11387
San Biagio Saracinisco FR 13 349 11736
Montenero Val Cocchiara IS 14 538 12274
Villa Latina FR 14 1241 13515
Alvito FR 14 2713 16228
Atina FR 15 4316 20544
Castel San Vincenzo IS 16 516 21060
Vicalvi FR 18 783 21843
Posta Fibreno FR 18 1139 22982
Castel di Sangro AQ 18 6538 29520
Scapoli IS 18 680 30200
Cerro al Volturno IS 19 1281 31481
Belmonte Castello FR 19 739 32220
Campoli Appennino FR 19 1725 33945
Rocchetta a Volturno IS 19 1113 35058
Casalattico FR 19 574 35632
Scanno AQ 19 1847 37479
Casalvieri FR 19 2698 40177
Roccaraso AQ 19 1627 41804
Rionero Sannitico IS 20 1118 42922
Vallerotonda FR 20 1581 44503

Municipalities with at least 50000 inhabitants

An earthquake occurred to
72 Km SW of Chieti (51815 inhabitants)
81 Km SE of L'Aquila (69753 inhabitants)
81 Km NW of Caserta (76326 inhabitants)
86 Km SW of Pescara (121014 inhabitants)
88 Km N of Aversa (53047 inhabitants)
88 Km E of Latina (125985 inhabitants)
90 Km S of Montesilvano (53738 inhabitants)
93 Km N of Giugliano in Campania (122974 inhabitants)
94 Km E of Velletri (53303 inhabitants)
95 Km E of Tivoli (56533 inhabitants)
95 Km N of Marano di Napoli (59874 inhabitants)
95 Km NW of Acerra (59573 inhabitants)
96 Km NW of Afragola (65057 inhabitants)
97 Km NW of Casoria (77642 inhabitants)
99 Km NW of Benevento (60091 inhabitants)
99 Km N of Pozzuoli (81661 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 0.8 2014-05-21
18:59:20		 41.7307 13.906 11 2015-09-21
09:36:50		 Bollettino Sismico Italiano INGV 20608781
Reviewed
Rev100 		ML 1.0 2014-05-21
18:59:19		 41.7207 13.8632 19 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 6556101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2014-05-21 18:59:20 ± 0.12
Latitude 41.7307 ± 0.0099
Longitude 13.9060 ± 0.0108
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 20608781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1238
Semi-minor axis of confidence ellipse (meter) 313
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 215
Circular confidence region, given by single value of horizontal uncertainty (meter) 1240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 117
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.14569
Epicentral distance of station farthest from the epicenter (degree) 0.39930
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 20608781
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-07-30 11:39:17

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 5
Type of magnitude ML
Reference to an origin 6556101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2014-05-21 19:25:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VAGA.HHE. 2014-05-21T18:59:34.81 0.6 undecidable manual S 142 44.3223 50 0.26 47
IV.INTR.HHZ. 2014-05-21T18:59:31.23 0.3 undecidable manual S 360 31.1466 50 0.19 73
IV.MIDA.HHZ. 2014-05-21T18:59:30.49 0.3 undecidable manual S 109 30.4473 50 -0.36 70
IV.VVLD.HHE. 2014-05-21T18:59:30.45 0.3 undecidable manual S 304 28.0497 50 0.26 72
IV.VAGA.HHE. 2014-05-21T18:59:28.74 0.1 undecidable manual P 142 44.3223 50 0.27 93
IV.CERA.HHZ. 2014-05-21T18:59:27.71 0.3 undecidable manual S 148 17.4714 121 0.46 70
IV.INTR.HHZ. 2014-05-21T18:59:26.40 0.3 undecidable manual P 360 31.1466 50 -0.04 75
IV.POFI.HHZ. 2014-05-21T18:59:26.73 0.3 undecidable manual S 265 16.1727 123 -0.14 76
IV.RNI2.HHZ. 2014-05-21T18:59:25.12 0.3 undecidable manual P 98 20.6682 117 0.3 72
IV.MIDA.HHZ. 2014-05-21T18:59:25.82 0.1 negative manual P 109 30.4473 50 -0.51 91
IV.CERA.HHZ. 2014-05-21T18:59:24.01 0.1 negative manual P 148 17.4714 121 -0.25 98
IV.POFI.HHZ. 2014-05-21T18:59:23.86 0.1 positive manual P 265 16.1727 123 -0.18 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CERA.HHN. ML:1.0 0.0000785 0.62 AML other m 2014-05-21T18:59:28.28
IV.CERA.HHE. ML:0.8 0.00005599999999999999 0.78 AML other m 2014-05-21T18:59:28.55
IV.INTR.HHE. ML:0.5 0.000016300000000000003 0.32 AML other m 2014-05-21T18:59:34.63
IV.INTR.HHN. ML:0.7 0.00002395 1.18 AML other m 2014-05-21T19:00:04.79
IV.MIDA.HHN. ML:1.1 0.0000566 0.34 AML other m 2014-05-21T18:59:31.19
IV.MIDA.HHE. ML:1.1 0.00005989999999999999 1.02 AML other m 2014-05-21T18:59:31.44
IV.POFI.HHN. ML:0.5 0.00002885 0.44 AML other m 2014-05-21T18:59:27.52
IV.POFI.HHE. ML:0.5 0.0000281 0.82 AML other m 2014-05-21T18:59:27.97
IV.RNI2.HHE. ML:1.1 0.000091 0.36 AML other m 2014-05-21T18:59:30.33
IV.RNI2.HHN. ML:1.0 0.00006405 1.28 AML other m 2014-05-21T18:59:30.59
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