Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 25-02-2021 and time 06:46:20 (UTC) in region 4 km W Castelgrande (PZ)

A magnitude ML 1.1 earthquake occured in region: 4 km W Castelgrande (PZ), on

  • 25-02-2021 06:46:20 (UTC)
  • 25-02-2021 07:46:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.7850, 15.3850 at 10 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.

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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
Castelgrande PZ 4 943 943
Santomenna SA 6 443 1386
Pescopagano PZ 6 1910 3296
Castelnuovo di Conza SA 7 619 3915
Laviano SA 7 1438 5353
Sant'Andrea di Conza AV 7 1539 6892
Conza della Campania AV 9 1373 8265
Muro Lucano PZ 9 5497 13762
Colliano SA 10 3638 17400
Valva SA 11 1643 19043
Rapone PZ 12 990 20033
Cairano AV 13 326 20359
Bella PZ 13 5171 25530
Teora AV 13 1537 27067
San Fele PZ 14 3004 30071
Caposele AV 14 3483 33554
Calitri AV 14 4666 38220
Calabritto AV 14 2391 40611
San Gregorio Magno SA 14 4286 44897
Ruvo del Monte PZ 15 1083 45980
Ricigliano SA 15 1144 47124
Palomonte SA 16 3985 51109
Senerchia AV 16 842 51951
Oliveto Citra SA 16 3802 55753
Buccino SA 17 5047 60800
Andretta AV 17 1927 62727
Romagnano al Monte SA 18 368 63095
Balvano PZ 18 1830 64925
Contursi Terme SA 19 3394 68319
Morra De Sanctis AV 19 1297 69616
Lioni AV 20 6201 75817

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km W of Potenza (67122 inhabitants)
39 Km NE of Battipaglia (50786 inhabitants)
52 Km E of Avellino (54857 inhabitants)
54 Km E of Salerno (135261 inhabitants)
58 Km E of Cava de' Tirreni (53659 inhabitants)
64 Km SE of Benevento (60091 inhabitants)
69 Km SW of Cerignola (58396 inhabitants)
72 Km E of Scafati (50787 inhabitants)
77 Km S of Foggia (151991 inhabitants)
77 Km E of Castellammare di Stabia (66466 inhabitants)
86 Km E of Torre del Greco (86275 inhabitants)
87 Km E of Portici (55274 inhabitants)
87 Km E of Acerra (59573 inhabitants)
87 Km E of Ercolano (53709 inhabitants)
91 Km SW of Andria (100440 inhabitants)
92 Km E of Afragola (65057 inhabitants)
93 Km E of Casoria (77642 inhabitants)
94 Km E of Caserta (76326 inhabitants)
96 Km E of Napoli (974074 inhabitants)
96 Km SW of Barletta (94814 inhabitants)
99 Km W of Altamura (70396 inhabitants)
100 Km S of San Severo (53905 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
Reviewed
Rev100 		ML 1.1 2021-02-25
06:46:20		 40.785 15.3847 11 2021-02-25
07:11:06		 Sala Sismica INGV-Roma 87473821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-25 06:46:20 ± 0.07
Latitude 40.7850 ± 0.0045
Longitude 15.3847 ± 0.0048
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87473821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 469
Semi-minor axis of confidence ellipse (meter) 383
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 211
Circular confidence region, given by single value of horizontal uncertainty (meter) 470.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 50
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.05486
Epicentral distance of station farthest from the epicenter (degree) 0.67179
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 87473821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-25 07:11:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ACER.HHZ. 2021-02-25T06:46:36.50 0.3 undecidable manual S 90 46.9197 50 0.69 61
IV.CMPR.HHZ. 2021-02-25T06:46:36.91 0.6 undecidable manual S 188 52.2033 50 -0.34 45
IV.MRVN.HHZ. 2021-02-25T06:46:33.58 0.6 undecidable manual P 66 74.5698 50 -0.11 45
IV.CDRU.HHZ. 2021-02-25T06:46:32.49 0.3 undecidable manual S 192 33.4443 50 0.26 71
IV.CMPR.HHZ. 2021-02-25T06:46:30.00 0.3 undecidable manual P 188 52.2033 50 -0.25 69
IV.SGO.HNZ. 2021-02-25T06:46:30.17 0.3 undecidable manual S 195 25.752 50 0 76
IV.VULT.HNZ. 2021-02-25T06:46:30.64 0.6 undecidable manual S 46 27.0507 50 0.11 49
IX.SALI.HNZ.01 2021-02-25T06:46:30.04 0.3 undecidable manual S 313 23.5542 50 0.46 69
IV.SNAL.HHZ. 2021-02-25T06:46:29.40 0.3 undecidable manual S 317 21.4674 116 0.43 70
IV.ACER.HHZ. 2021-02-25T06:46:29.02 0.3 undecidable manual P 90 46.9197 50 -0.41 67
IX.SNR3.HHZ.02 2021-02-25T06:46:28.28 0.6 undecidable manual S 251 17.0718 122 0.65 44
IX.LIO3.HHZ.02 2021-02-25T06:46:28.16 0.6 undecidable manual S 306 21.1677 116 -0.73 42
IV.CDRU.HHZ. 2021-02-25T06:46:27.16 0.3 undecidable manual P 192 33.4443 50 -0.2 72
IX.SCL3.HHZ.02 2021-02-25T06:46:27.01 0.3 undecidable manual S 133 14.5743 126 0.08 76
IV.MCRV.HHZ. 2021-02-25T06:46:27.77 0.3 undecidable manual S 269 18.1707 120 -0.2 74
IV.SGO.HNZ. 2021-02-25T06:46:26.52 0.3 undecidable manual P 195 25.752 50 0.35 70
IX.COL3.HHZ.02 2021-02-25T06:46:26.30 0.3 undecidable manual S 203 11.7771 132 0.14 75
IV.VULT.HNZ. 2021-02-25T06:46:26.10 0.3 undecidable manual P 46 27.0507 50 -0.27 72
IV.MRLC.HHZ. 2021-02-25T06:46:25.51 0.6 undecidable manual S 110 9.2796 138 -0.05 52
IX.LIO3.HHZ.02 2021-02-25T06:46:25.44 0.6 undecidable manual P 306 21.1677 116 0.01 51
IV.SNAL.HHZ. 2021-02-25T06:46:25.30 0.3 undecidable manual P 317 21.4674 116 -0.17 74
IX.VDS3.HNZ.01 2021-02-25T06:46:25.55 0.3 undecidable manual S 144 6.0939 150 0.66 66
IX.SALI.HNZ.01 2021-02-25T06:46:25.57 0.6 undecidable manual P 313 23.5542 50 -0.25 48
IV.MCRV.HHZ. 2021-02-25T06:46:24.54 0.3 negative manual P 269 18.1707 120 -0.36 71
IX.SFL3.HNZ.01 2021-02-25T06:46:24.50 0.6 undecidable manual P 88 16.2726 123 -0.07 51
IX.CLT3.HHZ.02 2021-02-25T06:46:24.55 0.6 undecidable manual P 7 13.1757 128 0.48 47
IX.SNR3.HHZ.02 2021-02-25T06:46:24.71 0.3 undecidable manual P 251 17.0718 122 0.01 77
IX.SCL3.HHZ.02 2021-02-25T06:46:23.64 0.3 undecidable manual P 133 14.5743 126 -0.65 66
IX.COL3.HHZ.02 2021-02-25T06:46:23.78 0.3 undecidable manual P 203 11.7771 132 -0.07 77
IX.CSG3.HNZ.01 2021-02-25T06:46:23.24 0.3 undecidable manual P 61 7.5813 144 -0.04 78
IV.MRLC.HHZ. 2021-02-25T06:46:23.31 0.1 undecidable manual P 110 9.2796 138 -0.19 100
IX.VDS3.HNZ.01 2021-02-25T06:46:23.17 0.3 undecidable manual P 144 6.0939 150 0.05 78
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MCRV.HHN. ML:1.2 0.00013779375 0.1216 AML other m 2021-02-25T06:46:28.35
IV.MCRV.HHE. ML:1.2 0.0001282934 0.1408 AML other m 2021-02-25T06:46:28.36
IV.CDRU.HHN. ML:0.7 0.00002169806 0.1184 AML other m 2021-02-25T06:46:34.91
IV.CDRU.HHE. ML:1.0 0.00004595 0.78 AML other m 2021-02-25T06:46:35.56
IV.SNAL.HHE. ML:1.0 0.000069071965 0.2176 AML other m 2021-02-25T06:46:31.10
IV.SNAL.HHN. ML:0.9 0.00005115265 0.2592 AML other m 2021-02-25T06:46:31.43
IV.SNAL.HNE. ML:1.0 0.00006665734500000001 0.2176 AML other m 2021-02-25T06:46:31.21
IV.SNAL.HNN. ML:0.9 0.00005541037999999999 0.5184 AML other m 2021-02-25T06:46:33.14
IV.ACER.HHE. ML:1.2 0.00005094753 0.2208 AML other m 2021-02-25T06:46:36.53
IV.ACER.HHN. ML:1.2 0.000050019695000000005 0.2208 AML other m 2021-02-25T06:46:36.96
IV.ACER.HNE. ML:1.8 0.00019997635 1.4592 AML other m 2021-02-25T06:46:51.81
IV.ACER.HNN. ML:1.8 0.0001676963 0.4768 AML other m 2021-02-25T06:46:39.78
IV.CMPR.HHE. ML:0.6 0.000011647272999999999 0.24 AML other m 2021-02-25T06:46:39.76
IV.CMPR.HHN. ML:0.6 0.0000112082655 0.2176 AML other m 2021-02-25T06:46:39.73
IV.MRVN.HHE. ML:1.0 0.000015931694999999998 0.2816 AML other m 2021-02-25T06:46:45.63
IV.MRVN.HHN. ML:1.1 0.00001782673 0.3168 AML other m 2021-02-25T06:46:45.57
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