Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 1.7 on date 24-02-2023 and time 10:50:48 (UTC) in region 3 km W San Polo Matese (CB)

A magnitude ML 1.7 (quarry blast) earthquake occured in region: 3 km W San Polo Matese (CB), on

  • 24-02-2023 10:50:48 (UTC)
  • 24-02-2023 11:50:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.4480, 14.4610 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
San Polo Matese CB 3 470 470
Campochiaro CB 4 646 1116
Bojano CB 4 8058 9174
San Massimo CB 7 855 10029
Guardiaregia CB 7 801 10830
Colle d'Anchise CB 9 807 11637
San Gregorio Matese CE 10 988 12625
Cantalupo nel Sannio IS 10 739 13364
Roccamandolfi IS 11 938 14302
Spinete CB 11 1320 15622
Castello del Matese CE 11 1494 17116
Vinchiaturo CB 12 3324 20440
Baranello CB 12 2673 23113
Piedimonte Matese CE 12 11297 34410
Cusano Mutri BN 13 4091 38501
San Potito Sannitico CE 13 1925 40426
Macchiagodena IS 13 1854 42280
Pietraroja BN 13 545 42825
Santa Maria del Molise IS 14 665 43490
Sepino CB 14 1964 45454
Sant'Elena Sannita IS 15 275 45729
Busso CB 15 1273 47002
San Giuliano del Sannio CB 15 1029 48031
Castelpetroso IS 16 1680 49711
Casalciprano CB 16 564 50275
Castelpizzuto IS 16 155 50430
Gioia Sannitica CE 16 3638 54068
Alife CE 17 7616 61684
Frosolone IS 17 3170 64854
Valle Agricola CE 17 890 65744
Cercepiccola CB 17 681 66425
Letino CE 18 712 67137
Oratino CB 19 1641 68778
Sassinoro BN 19 618 69396
Faicchio BN 19 3634 73030
Sant'Angelo d'Alife CE 19 2270 75300
Mirabello Sannitico CB 19 2180 77480
Carpinone IS 20 1157 78637
Gallo Matese CE 20 579 79216
Longano IS 20 690 79906
Cerreto Sannita BN 20 3940 83846
Ferrazzano CB 20 3344 87190

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km N of Caserta (76326 inhabitants)
44 Km NW of Benevento (60091 inhabitants)
56 Km N of Acerra (59573 inhabitants)
57 Km NE of Aversa (53047 inhabitants)
60 Km N of Afragola (65057 inhabitants)
62 Km NE of Giugliano in Campania (122974 inhabitants)
62 Km N of Casoria (77642 inhabitants)
65 Km NE of Marano di Napoli (59874 inhabitants)
66 Km NW of Avellino (54857 inhabitants)
70 Km N of Portici (55274 inhabitants)
70 Km N of Napoli (974074 inhabitants)
72 Km N of Ercolano (53709 inhabitants)
74 Km NE of Pozzuoli (81661 inhabitants)
74 Km N of Torre del Greco (86275 inhabitants)
78 Km N of Scafati (50787 inhabitants)
81 Km W of San Severo (53905 inhabitants)
84 Km N of Castellammare di Stabia (66466 inhabitants)
86 Km N of Cava de' Tirreni (53659 inhabitants)
89 Km N of Salerno (135261 inhabitants)
90 Km W of Foggia (151991 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 1.7 2023-02-24
10:50:48		 41.4478 14.461 1 2024-03-01
17:18:01		 Bollettino Sismico Italiano INGV 116010641
Reviewed
Rev100 		Md 1.4
ML 1.9 		2023-02-24
10:50:47		 41.3763 14.456 14 2023-02-24
14:08:56		 Sala Sismica INGV-Roma 114760551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-24 10:50:48 ± 0.19
Latitude 41.4478 ± 0.0162
Longitude 14.4610 ± 0.0144
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 116010641

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1840
Semi-minor axis of confidence ellipse (meter) 1100
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 342
Circular confidence region, given by single value of horizontal uncertainty (meter) 1840.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.42
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.39120
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 116010641
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-10-23 16:32:08

ML:1.9

Field Value
Value 1.9
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 114760551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-24 14:08:56

Md:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 3
Type of magnitude Md
Reference to an origin 114760551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-24 14:08:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ACATE.HNZ. 2023-02-24T10:52:47.10 3.0 undecidable manual Sn -1.53 0
IV.LPDG.HHZ. 2023-02-24T10:52:29.97 3.0 negative manual Pg 10.97 0
IV.MSRU.HHZ. 2023-02-24T10:52:29.22 3.0 undecidable manual Sg 7.63 0
IV.GALF.HHZ. 2023-02-24T10:52:26.89 3.0 undecidable manual Sn -5.06 0
CR.STON.BHZ. 2023-02-24T10:52:20.98 3.0 undecidable manual Sg 6.3 0
IV.ZEN8.EHZ. 2023-02-24T10:52:08.54 3.0 positive manual Pn 2.77 0
GU.GSCL.HHZ. 2023-02-24T10:51:59.61 3.0 positive manual Pg 6.91 0
IV.NOCI.HHZ. 2023-02-24T10:51:58.38 3.0 undecidable manual Sg 2.87 0
IV.OSSC.HHZ. 2023-02-24T10:51:38.10 3.0 positive manual Pn -1.98 0
IV.ARVD.HHZ. 2023-02-24T10:51:27.51 3.0 undecidable manual Pn -2.01 0
IV.CIGN.HHZ. 2023-02-24T10:50:56.28 0.3 undecidable manual P 58 43.4232 91 -0.86 57
IV.CERA.HNN. 2023-02-24T10:50:56.71 0.6 undecidable manual P 294 40.3263 91 0.18 47
IV.RNI2.HNE. 2023-02-24T10:50:56.08 0.3 undecidable manual P 318 38.2284 91 -0.02 74
IV.VAGA.HHZ. 2023-02-24T10:50:52.04 0.1 undecidable manual P 259 19.1697 91 -0.25 97
IV.SACR.HHN. 2023-02-24T10:50:52.73 0.3 undecidable manual P 105 21.0678 91 0.05 75
IV.BSSO.HHZ. 2023-02-24T10:50:52.04 0.1 undecidable manual P 45 15.4734 92 0.49 92
IV.SGG.HHZ. 2023-02-24T10:50:50.54 0.1 undecidable manual P 225 9.5793 93 0.17 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BSSO.HHE. ML:1.7 0.0006425 0.26 AML other m 2023-02-24T10:50:56.84
IV.BSSO.HNE. ML:1.7 0.000634 0.28 AML other m 2023-02-24T10:50:56.84
IV.BSSO.HHN. ML:1.5 0.0003435 1.28 AML other m 2023-02-24T10:50:59.04
IV.BSSO.HNN. ML:1.5 0.0003325 1.3 AML other m 2023-02-24T10:50:59.04
IV.VAGA.HHN. ML:1.9 0.00077930365 0.3392 AML other m 2023-02-24T10:51:00.15
IV.VAGA.HHE. ML:1.6 0.0003377713 0.4608 AML other m 2023-02-24T10:51:00.73
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