Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 1.2 on date 15-12-2021 and time 12:06:00 (Italy) in region 2 km N Sant'Agapito (IS)

A magnitude ML 1.2 (quarry blast) earthquake occured in region: 2 km N Sant'Agapito (IS), on

  • 15-12-2021 11:06:00 (UTC)
  • 15-12-2021 12:06:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.5600, 14.2270 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: quarry blast.

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
Sant'Agapito IS 2 1496 1496
Isernia IS 3 21842 23338
Longano IS 4 690 24028
Pettoranello del Molise IS 5 460 24488
Macchia d'Isernia IS 5 1035 25523
Monteroduni IS 6 2264 27787
Castelpizzuto IS 7 155 27942
Pesche IS 8 1661 29603
Fornelli IS 9 1909 31512
Carpinone IS 9 1157 32669
Montaquila IS 9 2456 35125
Miranda IS 10 1047 36172
Castelpetroso IS 10 1680 37852
Gallo Matese CE 10 579 38431
Colli a Volturno IS 11 1349 39780
Fontegreca CE 12 811 40591
Capriati a Volturno CE 12 1541 42132
Letino CE 12 712 42844
Santa Maria del Molise IS 12 665 43509
Sessano del Molise IS 13 727 44236
Roccamandolfi IS 13 938 45174
Ciorlano CE 13 426 45600
Rocchetta a Volturno IS 14 1113 46713
Acquaviva d'Isernia IS 14 425 47138
Prata Sannita CE 14 1502 48640
Filignano IS 14 648 49288
Cantalupo nel Sannio IS 14 739 50027
Pozzilli IS 15 2380 52407
Cerro al Volturno IS 15 1281 53688
Macchiagodena IS 15 1854 55542
Valle Agricola CE 15 890 56432
Scapoli IS 15 680 57112
Roccasicura IS 16 550 57662
Forlì del Sannio IS 16 675 58337
Pescolanciano IS 16 855 59192
San Massimo CB 17 855 60047
Venafro IS 17 11280 71327
Castel San Vincenzo IS 17 516 71843
Pratella CE 17 1565 73408
Carovilli IS 18 1359 74767
Rionero Sannitico IS 19 1118 75885
Ailano CE 19 1369 77254
Chiauci IS 19 233 77487
Civitanova del Sannio IS 19 945 78432
Frosolone IS 19 3170 81602
Conca Casale IS 20 200 81802
Sesto Campano IS 20 2388 84190
Pizzone IS 20 329 84519

Municipalities with at least 50000 inhabitants

An earthquake occurred to
55 Km N of Caserta (76326 inhabitants)
65 Km N of Aversa (53047 inhabitants)
67 Km NW of Benevento (60091 inhabitants)
69 Km N of Acerra (59573 inhabitants)
70 Km N of Giugliano in Campania (122974 inhabitants)
71 Km N of Afragola (65057 inhabitants)
73 Km N of Casoria (77642 inhabitants)
73 Km N of Marano di Napoli (59874 inhabitants)
80 Km N of Pozzuoli (81661 inhabitants)
80 Km N of Napoli (974074 inhabitants)
82 Km N of Portici (55274 inhabitants)
84 Km N of Ercolano (53709 inhabitants)
86 Km NW of Avellino (54857 inhabitants)
87 Km N of Torre del Greco (86275 inhabitants)
88 Km S of Chieti (51815 inhabitants)
94 Km N of Scafati (50787 inhabitants)
97 Km W of San Severo (53905 inhabitants)
98 Km N of Castellammare di Stabia (66466 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 2021-12-15
11:06:00		 41.5595 14.2268 1 2022-03-30
13:04:33		 Bollettino Sismico Italiano INGV 100408861
Reviewed
Rev100 		Md 1.3 2021-12-15
11:05:59		 41.5883 14.3037 17 2021-12-15
22:21:32		 Sala Sismica INGV-Roma 98561861
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-15 11:06:00 ± 0.13
Latitude 41.5595 ± 0.0072
Longitude 14.2268 ± 0.0156
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 100408861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1370
Semi-minor axis of confidence ellipse (meter) 730
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 256
Circular confidence region, given by single value of horizontal uncertainty (meter) 1370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 5
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.20684
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 100408861
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-31 16:24:27

Md:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 2
Type of magnitude Md
Reference to an origin 98561861
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-15 22:21:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.DGI.HHZ. 2021-12-15T11:07:44.75 3.0 undecidable manual Sn -1.14 0
CH.BNALP.HHZ. 2021-12-15T11:07:33.32 3.0 undecidable manual Pn -3.36 0
IV.RIBO.EHZ.01 2021-12-15T11:07:33.27 3.0 undecidable manual Sg 7.37 0
IV.FIR.HHZ. 2021-12-15T11:07:31.22 3.0 undecidable manual Sn -2.81 0
IV.PESA.HHZ. 2021-12-15T11:07:27.12 3.0 undecidable manual Sg 8.89 0
IV.ZEN8.EHZ. 2021-12-15T11:07:26.85 3.0 undecidable manual Pg 17.389999 0
AC.VLO.HHZ. 2021-12-15T11:07:19.44 3.0 undecidable manual Sn -3.02 0
IV.CADC.EHZ. 2021-12-15T11:07:15.29 3.0 undecidable manual Pn 3.95 0
RF.GEPF.HHZ. 2021-12-15T11:07:13.60 3.0 undecidable manual Pg 7.09 0
AC.KBN.HHZ. 2021-12-15T11:07:11.15 3.0 negative manual Pg 17.49 0
GU.GSCL.HHZ. 2021-12-15T11:07:01.62 3.0 undecidable manual Pn 4.08 0
IV.FIR.HHZ. 2021-12-15T11:06:47.75 3.0 undecidable manual Pn 0.37 0
IV.USI.HHZ. 2021-12-15T11:06:29.39 3.0 undecidable manual Pn -5.87 0
CR.STON.BHZ. 2021-12-15T11:06:29.12 3.0 negative manual Pn 0.38 0
IV.SGG.HHE. 2021-12-15T11:06:04.48 0.3 undecidable manual P 146 22.9548 91 -0.25 70
IV.RNI2.HHZ. 2021-12-15T11:06:03.71 0.3 undecidable manual P 339 17.0718 92 0.15 72
IV.VAGA.HHZ. 2021-12-15T11:06:03.56 0.1 undecidable manual P 178 15.9729 92 0.22 95
IV.CERA.HNE. 2021-12-15T11:06:03.51 0.3 undecidable manual P 284 17.7711 92 -0.19 71
IV.MIDA.HHZ. 2021-12-15T11:06:02.01 0.1 undecidable manual P 14 9.3795 93 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MIDA.HNE. ML:0.0 0.00022149995 0.256 AML other m 2021-12-15T11:06:05.72
IV.MIDA.HHN. ML:0.0 0.00025876755 0.2368 AML other m 2021-12-15T11:06:05.72
IV.MIDA.HNN. ML:0.0 0.00026333069999999996 0.5632 AML other m 2021-12-15T11:06:06.22
IV.MIDA.HHE. ML:0.0 0.0001456503 0.2816 AML other m 2021-12-15T11:06:07.11
IV.VAGA.HNE. ML:1.0 0.00011881812 0.2944 AML other m 2021-12-15T11:06:07.32
IV.VAGA.HNN. ML:1.4 0.0002567671 0.3392 AML other m 2021-12-15T11:06:09.15
IV.VAGA.HHN. ML:1.4 0.00025978849999999995 0.3392 AML other m 2021-12-15T11:06:09.14
IV.VAGA.HHE. ML:1.0 0.00011782125000000001 0.3008 AML other m 2021-12-15T11:06:07.32
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