Earthquake with magnitude of ML 2.9 on date 23-08-2021 and time 16:22:35 (Italy) in region Golfo di Policastro (Salerno, Potenza)

A magnitude ML 2.9 earthquake occured in region: Golfo di Policastro (Salerno, Potenza), on

  • 23-08-2021 14:22:35 (UTC)
  • 23-08-2021 16:22:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.021, 15.614 at 278 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sapri SA 6 6770 6770
Ispani SA 9 1026 7796
Vibonati SA 10 3293 11089
Maratea PZ 10 5139 16228
Torraca SA 10 1263 17491
Santa Marina SA 11 3243 20734
Tortorella SA 14 523 21257
Rivello PZ 14 2767 24024
Trecchina PZ 14 2316 26340
Morigerati SA 14 665 27005
San Giovanni a Piro SA 14 3780 30785
Casaletto Spartano SA 15 1420 32205
Nemoli PZ 17 1495 33700
Tortora CS 17 6187 39887
Torre Orsaia SA 17 2118 42005
Lagonegro PZ 17 5584 47589
Roccagloriosa SA 18 1722 49311
Caselle in Pittari SA 18 1956 51267
Lauria PZ 19 12919 64186
Celle di Bulgheria SA 20 1922 66108
Praia a Mare CS 20 6725 72833

Municipalities with at least 50000 inhabitants

An earthquake occurred to
71 Km S of Potenza (67122 inhabitants)
84 Km SE of Battipaglia (50786 inhabitants)
98 Km NW of Cosenza (67546 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
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire *

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 2.9 2021-08-23
14:22:35
40.0208 15.6135 278 2021-12-29
11:12:40
Bollettino Sismico Italiano INGV 96977601
Reviewed
Rev100
ML 2.9 2021-08-23
14:22:35
39.8978 15.3033 276 2021-08-23
14:38:04
Sala Sismica INGV-Roma 94542501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-23 14:22:35 ± 0.24
Latitude 40.0208 ± 0.0180
Longitude 15.6135 ± 0.0435
Depth (km) 278 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96977601

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3935
Semi-minor axis of confidence ellipse (meter) 979
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 69
Circular confidence region, given by single value of horizontal uncertainty (meter) 3930
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 139
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 44
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.12501
Epicentral distance of station farthest from the epicenter (degree) 1.75727
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 28
Magnitudes information

ML:2.9

Field Value
Value 2.9
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 96977601
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-29 16:19:00

ML:2.9

Field Value
Value 2.9
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 94542501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-23 14:38:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MSRU.HHE. 2021-08-23T14:23:52.12 0.6 undecidable manual S 183 1.7573 144 0.13 42
IV.PLAC.HHZ. 2021-08-23T14:23:51.63 0.6 undecidable manual S 158 1.6952 145 0.51 40
IV.FERC.HNN. 2021-08-23T14:23:49.74 0.6 undecidable manual S 166 1.617 146 -0.31 43
IV.SELL.HHZ. 2021-08-23T14:23:46.32 0.6 undecidable manual S 143 1.2986 152 0.22 52
IV.JOPP.HHZ. 2021-08-23T14:23:46.91 0.6 undecidable manual S 171 1.429 149 -0.73 42
IV.SERS.HHZ. 2021-08-23T14:23:45.71 0.6 undecidable manual S 140 1.2869 152 -0.25 52
MN.TIP.HHZ. 2021-08-23T14:23:45.10 0.6 undecidable manual S 133 1.2186 153 -0.1 54
IV.CELI.HHZ. 2021-08-23T14:23:43.66 0.6 undecidable manual S 132 0.9245 159 1.31 37
IV.GIZZ.HHN. 2021-08-23T14:23:43.78 0.3 undecidable manual S 156 1.1367 155 -0.57 74
IV.TDS.HHE. 2021-08-23T14:23:41.28 0.6 undecidable manual S 123 0.6619 165 0.89 48
IV.CAR1.HHZ. 2021-08-23T14:23:41.45 0.6 undecidable manual S 149 0.8939 160 -0.64 51
IV.MCEL.HHZ. 2021-08-23T14:23:39.64 0.6 undecidable manual S 25 0.3363 172 0.83 52
IV.CET2.HHZ. 2021-08-23T14:23:39.56 0.6 undecidable manual S 152 0.5576 167 -0.21 61
IV.CMPR.HHE. 2021-08-23T14:23:39.36 0.6 undecidable manual S 322 0.3804 171 0.4 61
IV.GRIS.EHZ. 2021-08-23T14:23:38.61 0.6 undecidable manual S 147 0.3345 172 -0.19 64
MN.CUC.HHZ. 2021-08-23T14:23:37.95 0.6 undecidable manual S 100 0.1574 176 -0.42 63
IV.MSRU.HHE. 2021-08-23T14:23:20.18 0.3 undecidable manual P 183 1.7573 144 0.44 59
IV.PLAC.HHZ. 2021-08-23T14:23:19.42 0.3 undecidable manual P 158 1.6952 145 0.19 64
IV.FERC.HNN. 2021-08-23T14:23:18.86 0.3 undecidable manual P 166 1.617 146 0.24 66
IV.SELL.HHZ. 2021-08-23T14:23:16.52 0.3 undecidable manual P 143 1.2986 152 0.18 78
IV.SERS.HHZ. 2021-08-23T14:23:16.46 0.3 undecidable manual P 140 1.2869 152 0.2 78
IV.JOPP.HHZ. 2021-08-23T14:23:16.96 0.3 undecidable manual P 171 1.429 149 -0.26 73
MN.TIP.HHZ. 2021-08-23T14:23:15.98 0.3 undecidable manual P 133 1.2186 153 0.16 80
IV.GIZZ.HHN. 2021-08-23T14:23:15.30 0.6 undecidable manual P 156 1.1367 155 -0.02 56
IV.CELI.HHZ. 2021-08-23T14:23:14.84 0.3 undecidable manual P 132 0.9245 159 0.67 75
IV.MRVN.HHZ. 2021-08-23T14:23:14.18 0.3 undecidable manual P 23 1.1295 155 -1.1 58
IV.PIPA.HHZ. 2021-08-23T14:23:14.82 0.3 undecidable manual P 120 1.0675 156 -0.1 84
IX.MNT3.EHN.02 2021-08-23T14:23:14.29 0.3 undecidable manual P 331 0.9371 159 0.06 88
IV.AMUR.HHN. 2021-08-23T14:23:14.66 0.6 undecidable manual P 40 1.1628 154 -0.82 44
IV.SNAL.HNE. 2021-08-23T14:23:14.24 0.3 undecidable manual P 341 0.9551 158 -0.08 86
IV.CAR1.HHZ. 2021-08-23T14:23:13.85 0.6 undecidable manual P 149 0.8939 160 -0.17 57
IV.MCRV.HHN. 2021-08-23T14:23:13.79 0.6 undecidable manual P 336 0.8337 161 0.05 60
IV.TDS.HHE. 2021-08-23T14:23:13.41 0.3 undecidable manual P 123 0.6619 165 0.37 87
IV.MCEL.HHZ. 2021-08-23T14:23:12.27 0.3 undecidable manual P 25 0.3363 172 0.14 98
IV.SCHR.EHN. 2021-08-23T14:23:12.04 0.3 undecidable manual P 63 0.3957 171 -0.21 95
IV.CET2.HHZ. 2021-08-23T14:23:12.49 0.3 undecidable manual P 152 0.5576 167 -0.19 92
IX.SRN3.HNE. 2021-08-23T14:23:12.60 0.3 undecidable manual P 346 0.4802 169 0.15 95
IV.MTSN.HNN. 2021-08-23T14:23:12.36 0.3 undecidable manual P 23 0.2671 174 0.35 95
IV.CDRU.HHE. 2021-08-23T14:23:12.55 0.3 undecidable manual P 333 0.5243 168 -0.03 95
IV.CMPR.HHE. 2021-08-23T14:23:12.09 0.3 undecidable manual P 322 0.3804 171 -0.12 96
IV.SIRI.HHZ. 2021-08-23T14:23:12.41 0.3 undecidable manual P 50 0.2527 174 0.43 94
IV.GRIS.EHZ. 2021-08-23T14:23:11.72 0.3 undecidable manual P 147 0.3345 172 -0.4 92
MN.CUC.HHZ. 2021-08-23T14:23:11.52 0.3 undecidable manual P 100 0.1574 176 -0.35 96
IV.MGR.HNZ. 2021-08-23T14:23:11.66 0.3 undecidable manual P 339 0.125 177 -0.19 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PIPA.HNE. ML:3 0.0001127615 1.2416 AML other m 2021-08-23T14:23:27.21
IV.CET2.HHE. ML:2.9 0.000104456005 0.4416 AML other m 2021-08-23T14:23:39.73
IV.SACR.HNE. ML:4.3 0.0021208025 0.0096 AML other m 2021-08-23T14:23:40.54
IV.CET2.HHN. ML:3.4 0.0003535 1.54 AML other m 2021-08-23T14:23:40.01
IV.GRIS.EHN. ML:2.3 2.85E-5 0.78 AML other m 2021-08-23T14:23:41.19
IV.MCEL.HHN. ML:2.5 5.2497425E-5 0.8384 AML other m 2021-08-23T14:23:41.22
IV.CAR1.HNE. ML:3 0.00012704185 0.3712 AML other m 2021-08-23T14:23:42.27
IV.CAR1.HHN. ML:3 0.0001355 0.32 AML other m 2021-08-23T14:23:42.44
IV.CAR1.HNN. ML:3 0.00012313954 0.3136 AML other m 2021-08-23T14:23:42.44
IV.CAR1.HHE. ML:2.8 9.18E-5 0.28 AML other m 2021-08-23T14:23:42.96
IV.PIPA.HHN. ML:0 6.18E-5 0.24 AML other m 2021-08-23T14:23:45.31
IV.CELI.HHN. ML:2.7 6.105E-5 0.38 AML other m 2021-08-23T14:23:45.61
IV.CELI.HHE. ML:2.6 5.347872E-5 0.3392 AML other m 2021-08-23T14:23:46.49
IV.PIPA.HHE. ML:0 6.735E-5 0.58 AML other m 2021-08-23T14:23:46.20
MN.TIP.HHE. ML:2.7 6.06E-5 0.58 AML other m 2021-08-23T14:23:46.68
MN.TIP.HHN. ML:2.5 4.105E-5 1.34 AML other m 2021-08-23T14:23:46.04
IV.SELL.HNN. ML:3.3 0.000218 0.5 AML other m 2021-08-23T14:23:47.40
IV.SELL.HHN. ML:2.8 7.04E-5 0.5 AML other m 2021-08-23T14:23:47.41
IV.SERS.HHE. ML:2.8 7.71E-5 0.66 AML other m 2021-08-23T14:23:47.93
IV.SERS.HNN. ML:2.9 8.8982235E-5 0.6784 AML other m 2021-08-23T14:23:47.93
IV.SERS.HHN. ML:2.9 9.475E-5 1.52 AML other m 2021-08-23T14:23:48.15
IV.SERS.HNE. ML:2.9 8.5462805E-5 0.5056 AML other m 2021-08-23T14:23:48.17
IV.SELL.HNE. ML:3.4 0.0003105 0.56 AML other m 2021-08-23T14:23:48.37
IV.SELL.HHE. ML:2.9 9.425E-5 0.56 AML other m 2021-08-23T14:23:48.37
IV.JOPP.HNE. ML:3.1 0.00012164385 0.288 AML other m 2021-08-23T14:23:49.57
IV.JOPP.HHN. ML:3.1 0.000118664735 1.7824 AML other m 2021-08-23T14:23:50.03
IV.JOPP.HNN. ML:3 0.000109708145 1.7696 AML other m 2021-08-23T14:23:50.03
IV.JOPP.HHE. ML:2.4 3.1578445E-5 0.5184 AML other m 2021-08-23T14:23:50.07
MN.TIP.HNE. ML:2.9 8.260437E-5 0.736 AML other m 2021-08-23T14:23:51.59
IV.GRIS.EHE. ML:2.3 3.200301E-5 0.704 AML other m 2021-08-23T14:23:52.31
IV.PLAC.HNE. ML:3.2 0.00016638875 0.5376 AML other m 2021-08-23T14:23:53.22
IV.PLAC.HHE. ML:2.6 4.1950495E-5 0.48 AML other m 2021-08-23T14:23:53.07
IX.NSC3.EHE.02 ML:0 7.2776485E-5 0.1088 AML other m 2021-08-23T14:23:53.73
IV.PLAC.HHN. ML:3.1 0.000119 0.86 AML other m 2021-08-23T14:23:53.90
IV.SACR.HHN. ML:0 7.9999875E-5 0.1792 AML other m 2021-08-23T14:23:54.67
IV.PIPA.HNN. ML:0 0.00016586055 0.5024 AML other m 2021-08-23T14:23:58.21
IV.SACR.HNN. ML:0 0.0018404725 0.1504 AML other m 2021-08-23T14:23:58.91
IX.NSC3.EHN.02 ML:0 5.8328785E-5 0.0448 AML other m 2021-08-23T14:23:59.13
IV.CELI.HNE. ML:3.7 0.0006466639 0.9152 AML other m 2021-08-23T14:24:03.10
IV.CELI.HNN. ML:3.8 0.00080949245 0.896 AML other m 2021-08-23T14:24:03.10
HL.VLS.HHN. ML:0 7.129221E-5 0.1792 AML other m 2021-08-23T14:24:08.72
IV.MTL1.HNN. ML:0 0.0022207045 1.5616 AML other m 2021-08-23T14:24:08.83
HL.VLS.HHE. ML:0 0.00010635 0.32 AML other m 2021-08-23T14:24:08.94
IV.SACR.HHE. ML:0 7.0453155E-5 0.1984 AML other m 2021-08-23T14:24:18.94
IV.LINA.HHN. ML:0 0.0001313392 0.9024 AML other m 2021-08-23T14:24:21.96
IV.LINA.HHE. ML:0 0.00010686848 1.04 AML other m 2021-08-23T14:24:45.57
IV.MTL1.HNE. ML:0 0.001859737 0.2912 AML other m 2021-08-23T14:25:10.47
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, http://terremoti.ingv.it/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
Waveforms Seismic signals in miniseed + resp format Download