Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 18-08-2023 and time 19:28:21 (Italy) in region 1 km NE Vaglio Basilicata (PZ)

A magnitude ML 1.2 earthquake occured in region: 1 km NE Vaglio Basilicata (PZ), on

  • 18-08-2023 17:28:21 (UTC)
  • 18-08-2023 19:28:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.6750, 15.9340 at 30 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
Vaglio Basilicata PZ 2 2047 2047
Cancellara PZ 6 1309 3356
Tolve PZ 7 3251 6607
Brindisi Montagna PZ 7 908 7515
Pietragalla PZ 9 4160 11675
Oppido Lucano PZ 11 3813 15488
Trivigno PZ 11 678 16166
Potenza PZ 12 67122 83288
San Chirico Nuovo PZ 12 1368 84656
Albano di Lucania PZ 13 1435 86091
Acerenza PZ 14 2402 88493
Pignola PZ 17 6962 95455
Campomaggiore PZ 17 811 96266
Anzi PZ 18 1696 97962
Tricarico MT 19 5388 103350
Castelmezzano PZ 19 800 104150
Avigliano PZ 19 11577 115727

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km E of Potenza (67122 inhabitants)
55 Km W of Altamura (70396 inhabitants)
56 Km W of Matera (60436 inhabitants)
66 Km S of Cerignola (58396 inhabitants)
69 Km SW of Andria (100440 inhabitants)
77 Km SW of Barletta (94814 inhabitants)
78 Km SW of Trani (56217 inhabitants)
79 Km SW of Bisceglie (55422 inhabitants)
80 Km SW of Bitonto (55540 inhabitants)
81 Km E of Battipaglia (50786 inhabitants)
81 Km SW of Molfetta (59874 inhabitants)
93 Km SW of Bari (326344 inhabitants)
94 Km SE of Foggia (151991 inhabitants)
99 Km E of Salerno (135261 inhabitants)
99 Km E of Avellino (54857 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 2023-08-18
17:28:21		 40.6753 15.9342 30 2024-09-10
16:44:16		 Bollettino Sismico Italiano INGV 120580021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-18 17:28:21 ± 0.18
Latitude 40.6753 ± 0.0063
Longitude 15.9342 ± 0.0107
Depth (km) 30 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 120580021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 792
Semi-minor axis of confidence ellipse (meter) 680
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 296
Circular confidence region, given by single value of horizontal uncertainty (meter) 790.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 138
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
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) 0.11152
Epicentral distance of station farthest from the epicenter (degree) 0.55758
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 120580021
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-09-05 00:12:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.AMUR.HHZ. 2023-08-18T17:28:41.78 0.6 undecidable manual S 65 61.8936 111 0.04 45
IV.MRVN.HHZ. 2023-08-18T17:28:38.11 0.3 undecidable manual S 27 48.1185 117 -0.26 67
IV.MTSN.HNN. 2023-08-18T17:28:38.61 0.6 undecidable manual S 199 47.9187 117 0.28 45
IV.AMUR.HHZ. 2023-08-18T17:28:33.71 0.3 undecidable manual P 65 61.8936 111 0.38 64
IX.PGN3.HHZ.02 2023-08-18T17:28:32.05 0.6 undecidable manual S 225 16.2726 149 0.1 49
IV.MTSN.HNN. 2023-08-18T17:28:31.22 0.3 undecidable manual P 199 47.9187 117 -0.14 68
IV.ACER.HHZ. 2023-08-18T17:28:31.31 0.6 undecidable manual S 3 12.3765 156 -0.15 49
IV.MRVN.HHZ. 2023-08-18T17:28:31.30 0.1 undecidable manual P 27 48.1185 117 -0.08 92
IV.MIGL.HHZ. 2023-08-18T17:28:30.42 0.3 undecidable manual P 100 43.4232 120 -0.32 67
IV.MCEL.HHN. 2023-08-18T17:28:30.25 0.3 undecidable manual P 196 40.4262 122 -0.1 70
IV.PALZ.HHZ. 2023-08-18T17:28:29.29 0.3 undecidable manual P 4 29.8479 131 0.25 70
IV.PTRP.HHZ. 2023-08-18T17:28:28.17 0.3 undecidable manual P 148 20.1687 143 0.17 72
IV.ACER.HHZ. 2023-08-18T17:28:27.42 0.1 negative manual P 3 12.3765 156 0.03 100
IX.PGN3.HHZ.02 2023-08-18T17:28:27.65 0.1 undecidable manual P 225 16.2726 149 -0.02 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PZUN.HHE. ML:0.7 0.000026947255 1.3184 AML other m 2023-08-18T17:28:31.08
IV.ACER.HHN. ML:1.5 0.000157 0.22 AML other m 2023-08-18T17:28:31.54
IV.ACER.HNN. ML:1.5 0.000147591 0.2048 AML other m 2023-08-18T17:28:31.43
IV.PZUN.HHN. ML:0.7 0.00002488763 0.8832 AML other m 2023-08-18T17:28:31.58
IV.ACER.HNE. ML:1.4 0.00012024185 0.1792 AML other m 2023-08-18T17:28:31.60
IV.ACER.HHE. ML:1.4 0.0001315 0.18 AML other m 2023-08-18T17:28:31.60
IV.PALZ.HHE. ML:1.7 0.00016562254999999998 1.8816 AML other m 2023-08-18T17:28:32.65
IX.PGN3.HHN.02 ML:0.7 0.00002054253 0.2816 AML other m 2023-08-18T17:28:32.13
IX.PGN3.HHE.02 ML:0.7 0.00001981606 0.2304 AML other m 2023-08-18T17:28:32.62
IV.AMUR.HHE. ML:1.3 0.000034157524999999994 1.6 AML other m 2023-08-18T17:28:33.49
IV.PZUN.HNE. ML:1.2 0.000077620955 0.4352 AML other m 2023-08-18T17:28:38.24
IV.MRVN.HHN. ML:0.8 0.00001363988 0.2048 AML other m 2023-08-18T17:28:38.91
IV.MRVN.HHE. ML:0.6 0.000011847135 0.0768 AML other m 2023-08-18T17:28:39.43
IV.PALZ.HHN. ML:1.4 0.00007464161500000001 1.28 AML other m 2023-08-18T17:28:44.75
IV.AMUR.HNN. ML:1.4 0.000038975835 0.8576 AML other m 2023-08-18T17:28:54.18
IV.AMUR.HNE. ML:1.6 0.00006534364 1.1776 AML other m 2023-08-18T17:28:54.65
IV.AMUR.HHN. ML:1.2 0.00002256802 1.5104 AML other m 2023-08-18T17:28:59.16
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