Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 20-04-2023 and time 00:40:42 (UTC) in region 2 km S Brindisi Montagna (PZ)

A magnitude ML 1.8 earthquake occured in region: 2 km S Brindisi Montagna (PZ), on

  • 20-04-2023 00:40:42 (UTC)
  • 20-04-2023 02:40:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.5940, 15.9410 at 22 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
Brindisi Montagna PZ 2 908 908
Trivigno PZ 4 678 1586
Albano di Lucania PZ 8 1435 3021
Vaglio Basilicata PZ 8 2047 5068
Anzi PZ 9 1696 6764
Castelmezzano PZ 12 800 7564
Campomaggiore PZ 12 811 8375
Potenza PZ 13 67122 75497
Tolve PZ 13 3251 78748
Pignola PZ 13 6962 85710
Pietrapertosa PZ 14 1032 86742
Abriola PZ 14 1531 88273
San Chirico Nuovo PZ 15 1368 89641
Laurenzana PZ 15 1797 91438
Calvello PZ 15 1948 93386
Cancellara PZ 15 1309 94695
Tricarico MT 17 5388 100083
Pietragalla PZ 18 4160 104243
Oppido Lucano PZ 20 3813 108056

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km E of Potenza (67122 inhabitants)
56 Km W of Matera (60436 inhabitants)
58 Km W of Altamura (70396 inhabitants)
75 Km S of Cerignola (58396 inhabitants)
77 Km SW of Andria (100440 inhabitants)
81 Km E of Battipaglia (50786 inhabitants)
86 Km SW of Bitonto (55540 inhabitants)
86 Km SW of Barletta (94814 inhabitants)
86 Km SW of Trani (56217 inhabitants)
86 Km SW of Bisceglie (55422 inhabitants)
88 Km SW of Molfetta (59874 inhabitants)
98 Km SW of Bari (326344 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 1.8 2023-04-20
00:40:42		 40.5938 15.9407 22 2024-03-01
17:18:07		 Bollettino Sismico Italiano INGV 117242011
Reviewed
Rev100 		ML 1.7 2023-04-20
00:40:42		 40.5903 15.9297 19 2023-04-20
01:03:16		 Sala Sismica INGV-Roma 116534971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-20 00:40:42 ± 0.09
Latitude 40.5938 ± 0.0045
Longitude 15.9407 ± 0.0059
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 117242011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 550
Semi-minor axis of confidence ellipse (meter) 29
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 144
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 40
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 46
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) 0.11152
Epicentral distance of station farthest from the epicenter (degree) 0.87684
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 54
Type of magnitude ML
Reference to an origin 116534971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-20 01:03:16

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 52
Type of magnitude ML
Reference to an origin 117242011
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-01-26 11:40:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MGR.HHZ. 2023-04-20T00:41:01.60 0.6 undecidable manual S 213 60.2952 103 0.34 44
IV.CDRU.HHZ. 2023-04-20T00:41:00.30 0.6 undecidable manual S 258 54.9006 105 0.44 43
OT.OT15.EHZ. 2023-04-20T00:41:00.21 0.6 undecidable manual P 54 97.3248 98 1.31 27
IV.NOCI.HHZ. 2023-04-20T00:41:00.03 0.3 undecidable manual P 77 96.9252 98 1.19 43
IV.MRVN.HHZ. 2023-04-20T00:40:59.80 0.6 undecidable manual S 22 56.0994 104 -0.37 44
IV.VULT.HHZ. 2023-04-20T00:40:58.00 0.6 undecidable manual S 326 48.4182 107 -0.22 46
IV.SIRI.HHZ. 2023-04-20T00:40:57.27 0.6 undecidable manual S 188 46.1205 108 -0.34 45
IV.MIGL.HHZ. 2023-04-20T00:40:57.20 0.6 undecidable manual S 88 42.1245 110 0.58 42
IX.SRN3.HHZ.02 2023-04-20T00:40:56.70 0.6 undecidable manual S 254 42.4242 110 0.01 49
IV.MTSN.HHZ. 2023-04-20T00:40:56.43 0.6 undecidable manual S 204 39.7269 112 0.42 45
IV.PALZ.HHZ. 2023-04-20T00:40:55.96 0.6 undecidable manual S 2 38.9277 112 0.15 48
IV.BULG.HHZ. 2023-04-20T00:40:55.46 0.3 undecidable manual P 220 74.37 100 0.05 68
IX.SNR3.EHZ.02 2023-04-20T00:40:54.01 0.3 undecidable manual P 284 64.8906 102 0.04 69
IV.SNAL.HHZ. 2023-04-20T00:40:54.98 0.6 undecidable manual P 301 71.6727 101 -0.01 46
IV.MCEL.HHZ. 2023-04-20T00:40:54.11 0.6 undecidable manual S 201 32.0457 117 -0.04 49
IV.MCRV.HHZ. 2023-04-20T00:40:54.12 0.3 undecidable manual P 288 68.2761 101 -0.36 65
GE.MATE.HHZ. 2023-04-20T00:40:53.57 0.3 undecidable manual P 84 64.5909 102 -0.36 66
IX.STN3.EHZ.02 2023-04-20T00:40:53.34 0.6 undecidable manual S 254 25.3524 125 0.72 42
IV.MGR.HHZ. 2023-04-20T00:40:53.08 0.3 undecidable manual P 213 60.2952 103 -0.19 68
IX.VGG3.HNZ.01 2023-04-20T00:40:53.44 0.6 undecidable manual S 187 28.749 121 0.05 49
IV.AMUR.HHZ. 2023-04-20T00:40:53.72 0.3 undecidable manual P 58 65.6898 102 -0.37 65
IV.MRVN.HHZ. 2023-04-20T00:40:52.59 0.3 undecidable manual P 22 56.0994 104 -0.06 71
IV.ACER.HHZ. 2023-04-20T00:40:52.03 0.6 undecidable manual S 0 21.3675 130 0.25 48
IX.MRN3.HNZ.01 2023-04-20T00:40:52.59 0.6 undecidable manual S 224 25.752 124 -0.12 49
IV.CDRU.HHZ. 2023-04-20T00:40:52.14 0.1 undecidable manual P 258 54.9006 105 -0.33 89
IV.VULT.HHZ. 2023-04-20T00:40:51.47 0.6 undecidable manual P 326 48.4182 107 -0.05 48
IV.MRLC.HHZ. 2023-04-20T00:40:51.05 0.3 undecidable manual P 296 42.0246 110 0.46 66
IV.SCHR.EHZ. 2023-04-20T00:40:51.10 0.6 undecidable manual P 165 45.2214 109 0.05 47
IV.SIRI.HHZ. 2023-04-20T00:40:50.91 0.3 undecidable manual P 188 46.1205 108 -0.26 69
IX.SRN3.HHZ.02 2023-04-20T00:40:50.61 0.3 undecidable manual P 254 42.4242 110 -0.03 73
IV.PZUN.HHZ. 2023-04-20T00:40:50.25 0.3 undecidable manual S 297 12.6762 146 0.03 76
IV.MTSN.HHZ. 2023-04-20T00:40:50.13 0.3 undecidable manual P 204 39.7269 112 -0.11 72
IV.MIGL.HHZ. 2023-04-20T00:40:50.37 0.1 undecidable manual P 88 42.1245 110 -0.23 93
IV.MCEL.HHZ. 2023-04-20T00:40:49.04 0.1 undecidable manual P 201 32.0457 117 -0.13 97
IX.PGN3.HHZ.02 2023-04-20T00:40:49.77 0.6 undecidable manual S 259 12.3765 147 -0.4 46
IV.PALZ.HHZ. 2023-04-20T00:40:49.68 0.3 undecidable manual P 2 38.9277 112 -0.45 67
IX.BEL3.HNZ.01 2023-04-20T00:40:49.02 0.6 undecidable manual P 298 28.9488 121 0.27 47
IV.PTRP.HHZ. 2023-04-20T00:40:49.90 0.6 undecidable manual S 128 12.9759 146 -0.36 47
IX.MRN3.HNZ.01 2023-04-20T00:40:48.28 0.1 undecidable manual P 224 25.752 124 -0.06 99
IX.AVG3.HNZ.01 2023-04-20T00:40:48.81 0.6 undecidable manual P 316 26.0517 124 0.44 46
IX.STN3.EHZ.02 2023-04-20T00:40:48.46 0.3 undecidable manual P 254 25.3524 125 0.17 73
IX.VGG3.HNZ.01 2023-04-20T00:40:48.76 0.3 undecidable manual P 187 28.749 121 0.03 74
IV.PTRP.HHZ. 2023-04-20T00:40:47.03 0.1 undecidable manual P 128 12.9759 146 0.11 100
IV.ACER.HHZ. 2023-04-20T00:40:47.76 0.1 undecidable manual P 0 21.3675 130 -0.04 100
IV.PZUN.HHZ. 2023-04-20T00:40:47.03 0.1 undecidable manual P 297 12.6762 146 0.13 100
IX.PGN3.HHZ.02 2023-04-20T00:40:46.67 0.1 undecidable manual P 259 12.3765 147 -0.2 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IX.PGN3.HHE.02 ML:2.2 0.001065 0.36 AML other m 2023-04-20T00:40:49.99
IX.PGN3.HHN.02 ML:2.1 0.0007515000000000001 0.7 AML other m 2023-04-20T00:40:50.44
IV.PZUN.HHE. ML:2.3 0.0012250000000000002 0.58 AML other m 2023-04-20T00:40:51.72
IV.PZUN.HNE. ML:2.3 0.00125 0.56 AML other m 2023-04-20T00:40:51.72
IV.PZUN.HHN. ML:2.2 0.0009130000000000001 0.52 AML other m 2023-04-20T00:40:51.55
IV.PZUN.HNN. ML:2.1 0.0008674999999999999 0.52 AML other m 2023-04-20T00:40:51.55
IV.PTRP.HHN. ML:2.0 0.0005555 0.36 AML other m 2023-04-20T00:40:51.84
IV.PTRP.HHE. ML:1.9 0.0004865 0.6 AML other m 2023-04-20T00:40:51.44
IV.ACER.HNE. ML:2.2 0.000825 0.64 AML other m 2023-04-20T00:40:52.20
IV.ACER.HHE. ML:2.2 0.0008600000000000001 0.64 AML other m 2023-04-20T00:40:52.20
IV.ACER.HNN. ML:2.1 0.0006185 1.32 AML other m 2023-04-20T00:40:52.74
IV.ACER.HHN. ML:2.1 0.0006385 1.32 AML other m 2023-04-20T00:40:52.74
IV.MCEL.HHE. ML:1.6 0.0001585 0.36 AML other m 2023-04-20T00:40:54.53
IV.MCEL.HHN. ML:1.7 0.00016749999999999998 0.46 AML other m 2023-04-20T00:40:54.95
IV.MCEL.HNN. ML:2.0 0.000412 0.68 AML other m 2023-04-20T00:40:55.35
IV.MCEL.HNE. ML:2.1 0.0004345 0.26 AML other m 2023-04-20T00:40:55.65
IV.MTSN.HHN. ML:1.7 0.000142 0.1 AML other m 2023-04-20T00:40:57.05
IV.PALZ.HHN. ML:1.4 0.00007039999999999999 0.82 AML other m 2023-04-20T00:40:58.12
IV.MIGL.HHE. ML:2.4 0.0008240000000000001 0.1 AML other m 2023-04-20T00:40:58.30
IV.MIGL.HHN. ML:2.2 0.00046149999999999994 0.34 AML other m 2023-04-20T00:40:58.12
IV.SIRI.HHE. ML:1.6 0.0001064 0.22 AML other m 2023-04-20T00:40:58.38
IV.MRLC.HHE. ML:1.3 0.00005925 1.14 AML other m 2023-04-20T00:40:58.23
IV.SIRI.HHN. ML:1.5 0.0000853 0.22 AML other m 2023-04-20T00:40:58.88
IV.SCHR.EHN. ML:1.3 0.000049850000000000006 0.16 AML other m 2023-04-20T00:40:59.11
IV.MRLC.HHN. ML:1.5 0.00008945 0.52 AML other m 2023-04-20T00:40:59.57
IV.VULT.HHE. ML:1.5 0.00008405 0.52 AML other m 2023-04-20T00:41:00.15
IX.SRN3.HHE.02 ML:1.6 0.000117 0.52 AML other m 2023-04-20T00:41:00.80
IV.MTSN.HHE. ML:1.5 0.00009895 0.24 AML other m 2023-04-20T00:41:00.97
IV.PALZ.HHE. ML:1.4 0.00008395 0.42 AML other m 2023-04-20T00:41:01.09
IX.SRN3.HHN.02 ML:1.8 0.0001705 0.28 AML other m 2023-04-20T00:41:01.40
IV.VULT.HHN. ML:1.6 0.00008955000000000001 0.82 AML other m 2023-04-20T00:41:01.42
IV.SCHR.EHE. ML:1.2 0.000043700000000000005 0.84 AML other m 2023-04-20T00:41:02.15
IV.MRVN.HHN. ML:1.4 0.000054900000000000006 1.04 AML other m 2023-04-20T00:41:03.60
IV.MRVN.HHE. ML:1.4 0.0000477 0.72 AML other m 2023-04-20T00:41:03.25
IV.MGR.HHN. ML:1.4 0.000046450000000000004 1.62 AML other m 2023-04-20T00:41:03.06
IV.AMUR.HHE. ML:1.8 0.0001017 1.64 AML other m 2023-04-20T00:41:05.91
GE.MATE.HHN. ML:1.8 0.00012570000000000002 0.38 AML other m 2023-04-20T00:41:05.65
IV.AMUR.HHN. ML:1.8 0.00010465 0.16 AML other m 2023-04-20T00:41:06.46
GE.MATE.HHE. ML:1.7 0.00008525 0.36 AML other m 2023-04-20T00:41:06.63
IV.MCRV.HHN. ML:1.8 0.00009965 0.32 AML other m 2023-04-20T00:41:07.82
IV.MCRV.HHE. ML:1.6 0.00007245 0.46 AML other m 2023-04-20T00:41:08.86
IX.SNR3.EHE.02 ML:1.6 0.00006914999999999999 0.5 AML other m 2023-04-20T00:41:08.58
IV.MGR.HHE. ML:1.3 0.00004035 0.44 AML other m 2023-04-20T00:41:09.77
IV.CDRU.HHE. ML:1.5 0.00006994999999999999 1.1 AML other m 2023-04-20T00:41:10.86
IX.SNR3.EHN.02 ML:1.8 0.000111 0.2 AML other m 2023-04-20T00:41:10.97
IV.CDRU.HHN. ML:1.3 0.000041700000000000004 0.66 AML other m 2023-04-20T00:41:10.99
IV.NOCI.HHN. ML:2.3 0.0002 1.32 AML other m 2023-04-20T00:41:13.05
IV.NOCI.HHE. ML:2.2 0.00018099999999999998 0.28 AML other m 2023-04-20T00:41:13.81
IV.NOCI.HNE. ML:2.2 0.00015 0.28 AML other m 2023-04-20T00:41:13.67
IV.NOCI.HNN. ML:2.3 0.000194 1.28 AML other m 2023-04-20T00:41:14.84
OT.OT15.EHN. ML:1.6 0.000046399999999999996 1.08 AML other m 2023-04-20T00:41:15.81
OT.OT15.EHE. ML:1.8 0.000060450000000000006 1.3 AML other m 2023-04-20T00:41:15.83
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