Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 02-05-2021 and time 15:23:20 (Italy) in region 2 km S Castel di Sangro (AQ)

A magnitude ML 1.2 earthquake occured in region: 2 km S Castel di Sangro (AQ), on

  • 02-05-2021 13:23:20 (UTC)
  • 02-05-2021 15:23:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7640, 14.1070 at 9 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
Castel di Sangro AQ 3 6538 6538
Scontrone AQ 6 574 7112
Rionero Sannitico IS 6 1118 8230
Montenero Val Cocchiara IS 6 538 8768
Alfedena AQ 7 864 9632
San Pietro Avellana IS 7 503 10135
Roccaraso AQ 10 1627 11762
Barrea AQ 10 726 12488
Forlì del Sannio IS 10 675 13163
Acquaviva d'Isernia IS 11 425 13588
Cerro al Volturno IS 12 1281 14869
Pizzone IS 12 329 15198
Rivisondoli AQ 12 700 15898
Castel San Vincenzo IS 13 516 16414
Roccasicura IS 13 550 16964
Ateleta AQ 13 1181 18145
Vastogirardi IS 13 704 18849
Civitella Alfedena AQ 14 296 19145
Pescocostanzo AQ 15 1128 20273
Castel del Giudice IS 15 346 20619
Villetta Barrea AQ 15 653 21272
Capracotta IS 15 903 22175
Rocchetta a Volturno IS 16 1113 23288
Carovilli IS 17 1359 24647
Scapoli IS 17 680 25327
Miranda IS 18 1047 26374
Fornelli IS 18 1909 28283
Gamberale CH 18 320 28603
Sant'Angelo del Pesco IS 18 364 28967
Colli a Volturno IS 18 1349 30316

Municipalities with at least 50000 inhabitants

An earthquake occurred to
66 Km S of Chieti (51815 inhabitants)
79 Km S of Pescara (121014 inhabitants)
79 Km N of Caserta (76326 inhabitants)
84 Km S of Montesilvano (53738 inhabitants)
88 Km SE of L'Aquila (69753 inhabitants)
88 Km N of Aversa (53047 inhabitants)
90 Km NW of Benevento (60091 inhabitants)
93 Km N of Giugliano in Campania (122974 inhabitants)
94 Km N of Acerra (59573 inhabitants)
95 Km N of Afragola (65057 inhabitants)
96 Km N of Marano di Napoli (59874 inhabitants)
97 Km N of Casoria (77642 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 1.2 2021-05-02
13:23:20		 41.7642 14.1067 9 2021-12-29
11:12:35		 Bollettino Sismico Italiano INGV 96316371
Reviewed
Rev100 		ML 1.1 2021-05-02
13:23:20		 41.7422 14.1308 12 2021-05-02
13:31:15		 Sala Sismica INGV-Roma 89716621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-02 13:23:20 ± 0.07
Latitude 41.7642 ± 0.0045
Longitude 14.1067 ± 0.0072
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96316371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 559
Semi-minor axis of confidence ellipse (meter) 553
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 117
Circular confidence region, given by single value of horizontal uncertainty (meter) 560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 127
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.07015
Epicentral distance of station farthest from the epicenter (degree) 0.36153
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:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 96316371
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-07 13:16:57

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 89716621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-02 13:31:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VAGA.HHZ. 2021-05-02T13:23:34.39 0.6 undecidable manual S 165 40.1265 50 0.26 47
IV.INTR.HHZ. 2021-05-02T13:23:32.06 0.6 undecidable manual S 329 32.1456 50 0.06 50
IV.LPEL.HHZ. 2021-05-02T13:23:32.14 0.6 undecidable manual S 11 31.9458 50 0.18 48
IV.CERA.HHZ. 2021-05-02T13:23:28.26 0.3 undecidable manual S 202 19.869 115 0.11 75
IV.VAGA.HHZ. 2021-05-02T13:23:28.25 0.3 undecidable manual P 165 40.1265 50 -0.14 72
IV.POFI.HNE. 2021-05-02T13:23:27.30 0.3 undecidable manual P 261 33.0447 50 -0.01 75
IV.MIDA.HHZ. 2021-05-02T13:23:27.41 0.6 undecidable manual S 138 18.2706 117 -0.24 49
IV.LPEL.HHZ. 2021-05-02T13:23:27.40 0.6 undecidable manual P 11 31.9458 50 0.25 48
IV.INTR.HHZ. 2021-05-02T13:23:26.81 0.3 undecidable manual P 329 32.1456 50 -0.35 70
IV.CERA.HHZ. 2021-05-02T13:23:24.86 0.3 undecidable manual P 202 19.869 115 -0.09 76
IV.RNI2.HHZ. 2021-05-02T13:23:24.82 0.3 undecidable manual S 151 7.7811 140 0.08 77
IV.MIDA.HHZ. 2021-05-02T13:23:24.49 0.1 positive manual P 138 18.2706 117 -0.17 99
IV.RNI2.HHZ. 2021-05-02T13:23:23.19 0.1 positive manual P 151 7.7811 140 0.22 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RNI2.HNN. ML:1.0 0.0001565 1.6 AML other m 2021-05-02T13:23:26.12
IV.RNI2.HHN. ML:1.0 0.00016549999999999998 1.08 AML other m 2021-05-02T13:23:26.91
IV.RNI2.HNE. ML:1.1 0.000201 1.18 AML other m 2021-05-02T13:23:26.04
IV.RNI2.HHE. ML:1.1 0.00020099999999999998 0.84 AML other m 2021-05-02T13:23:27.04
IV.MIDA.HHN. ML:1.1 0.00010445 1 AML other m 2021-05-02T13:23:28.59
IV.MIDA.HHE. ML:1.1 0.0001051 0.44 AML other m 2021-05-02T13:23:28.50
IV.INTR.HHE. ML:1.2 0.00007205 1.06 AML other m 2021-05-02T13:23:32.14
IV.INTR.HHN. ML:1.4 0.0001021 1.44 AML other m 2021-05-02T13:23:33.14
IV.INTR.HNE. ML:2.1 0.0006255 1.42 AML other m 2021-05-02T13:23:35.88
IV.INTR.HNN. ML:2.2 0.0006695 1.44 AML other m 2021-05-02T13:23:35.94
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