Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 21-03-2023 and time 06:30:18 (UTC) in region 3 km W Potenza (PZ)

A magnitude ML 1.0 earthquake occured in region: 3 km W Potenza (PZ), on

  • 21-03-2023 06:30:18 (UTC)
  • 21-03-2023 07:30:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.6530, 15.7700 at 9 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
Potenza PZ 3 67122 67122
Pignola PZ 9 6962 74084
Avigliano PZ 10 11577 85661
Ruoti PZ 11 3579 89240
Tito PZ 11 7332 96572
Picerno PZ 11 5985 102557
Vaglio Basilicata PZ 13 2047 104604
Pietragalla PZ 14 4160 108764
Baragiano PZ 15 2671 111435
Brindisi Montagna PZ 15 908 112343
Cancellara PZ 16 1309 113652
Satriano di Lucania PZ 16 2374 116026
Abriola PZ 16 1531 117557
Filiano PZ 18 2926 120483
Sasso di Castalda PZ 20 835 121318

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km W of Potenza (67122 inhabitants)
67 Km E of Battipaglia (50786 inhabitants)
69 Km W of Altamura (70396 inhabitants)
69 Km S of Cerignola (58396 inhabitants)
70 Km W of Matera (60436 inhabitants)
78 Km SW of Andria (100440 inhabitants)
85 Km E of Salerno (135261 inhabitants)
86 Km SW of Barletta (94814 inhabitants)
87 Km E of Avellino (54857 inhabitants)
88 Km SW of Trani (56217 inhabitants)
90 Km E of Cava de' Tirreni (53659 inhabitants)
90 Km SW of Bisceglie (55422 inhabitants)
92 Km S of Foggia (151991 inhabitants)
93 Km SW of Bitonto (55540 inhabitants)
93 Km SW of Molfetta (59874 inhabitants)
99 Km SE of Benevento (60091 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.0 2023-03-21
06:30:18		 40.6527 15.7705 9 2023-03-21
06:37:32		 Sala Sismica INGV-Roma 115585381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-21 06:30:18 ± 0.15
Latitude 40.6527 ± 0.0090
Longitude 15.7705 ± 0.0130
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 115585381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1229
Semi-minor axis of confidence ellipse (meter) 517
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 129
Circular confidence region, given by single value of horizontal uncertainty (meter) 1230.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32825
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 115585381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-21 06:37:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MRB1.HHZ. 2023-03-21T06:30:40.63 3.0 undecidable manual S -0.67 0
IV.MRB1.HHZ. 2023-03-21T06:30:31.16 3.0 positive manual P 0.85 0
IV.MCEL.HHZ. 2023-03-21T06:30:30.83 0.6 undecidable manual S 176 0.3283 50 0.05 63
IV.PTRP.HHZ. 2023-03-21T06:30:29.22 0.6 undecidable manual S 121 0.2563 108 0.6 55
IX.SRN3.HHE.02 2023-03-21T06:30:29.68 0.6 undecidable manual S 235 0.2896 50 0.04 64
IV.ACER.HHZ. 2023-03-21T06:30:26.15 0.3 undecidable manual S 44 0.1871 114 0.03 100
IX.STN3.EHZ.02 2023-03-21T06:30:25.44 0.6 undecidable manual S 216 0.1520 119 0.52 62
IV.MCEL.HHZ. 2023-03-21T06:30:24.91 0.3 undecidable manual P 176 0.3283 50 -0.56 88
IV.PTRP.HHZ. 2023-03-21T06:30:24.38 0.6 positive manual P 121 0.2563 108 0.16 63
IX.SRN3.HHE.02 2023-03-21T06:30:24.44 0.6 undecidable manual P 235 0.2896 50 -0.37 61
IV.MRLC.HHZ. 2023-03-21T06:30:23.76 0.6 positive manual P 296 0.2374 110 -0.05 65
IV.ACER.HHZ. 2023-03-21T06:30:22.74 0.3 undecidable manual P 44 0.1871 114 -0.04 99
IX.PGN3.HHZ.02 2023-03-21T06:30:22.08 0.3 undecidable manual S 166 0.0827 136 -0.69 81
IX.STN3.EHZ.02 2023-03-21T06:30:22.70 0.6 undecidable manual P 216 0.1520 119 0.61 59
IX.PGN3.HHZ.02 2023-03-21T06:30:21.20 0.6 negative manual P 166 0.0827 136 0.36 64
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IX.PGN3.HHE.02 ML:0.8 0.00009520000000000001 0.2 AML other m 2023-03-21T06:30:24.59
IX.PGN3.HHN.02 ML:0.8 0.000085620855 0.32 AML other m 2023-03-21T06:30:24.89
IV.ACER.HHN. ML:1.0 0.000074405955 0.1792 AML other m 2023-03-21T06:30:26.97
IV.ACER.HHE. ML:1.0 0.00007175000000000001 0.64 AML other m 2023-03-21T06:30:27.01
IX.PGN3.HNE.01 ML:1.4 0.0003254829 1.856 AML other m 2023-03-21T06:30:22.13
IX.PGN3.HNN.01 ML:1.4 0.00030958445 4.944 AML other m 2023-03-21T06:30:25.00
IV.ACER.HNE. ML:1.1 0.00009820314500000001 2.2176 AML other m 2023-03-21T06:30:28.28
IV.ACER.HNN. ML:1.5 0.0002132598 1.2416 AML other m 2023-03-21T06:30:27.59
IV.MRLC.HHE. ML:0.6 0.000024508099999999997 1.4592 AML other m 2023-03-21T06:30:23.49
IV.MRLC.HHN. ML:0.7 0.00003001916 2.6208 AML other m 2023-03-21T06:30:30.62
IV.MRLC.HNE. ML:0.6 0.000021606174999999998 4.16 AML other m 2023-03-21T06:30:29.48
IV.MRLC.HNN. ML:0.8 0.000036544445000000005 4.9984 AML other m 2023-03-21T06:30:40.14
IV.PTRP.HHE. ML:0.8 0.000030199825 1.9808 AML other m 2023-03-21T06:30:41.23
IV.PTRP.HHN. ML:0.9 0.00003766771 0.4192 AML other m 2023-03-21T06:30:31.10
IV.MCEL.HNE. ML:1.3 0.00007767376 3.6224 AML other m 2023-03-21T06:30:40.96
IV.MCEL.HNN. ML:1.2 0.000058399599999999996 1.2416 AML other m 2023-03-21T06:30:26.76
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, /tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download