Earthquake with magnitude of ML 2.2 on date 17-10-2021 and time 07:35:08 (Italy) in region 4 km E Torraca (SA)

A magnitude ML 2.2 earthquake occured in region: 4 km E Torraca (SA), on

  • 17-10-2021 05:35:08 (UTC)
  • 17-10-2021 07:35:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.1080, 15.6890 at 10 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
Torraca SA 5 1263 1263
Sapri SA 6 6770 8033
Lagonegro PZ 7 5584 13617
Rivello PZ 7 2767 16384
Casaletto Spartano SA 8 1420 17804
Tortorella SA 8 523 18327
Vibonati SA 9 3293 21620
Nemoli PZ 11 1495 23115
Ispani SA 11 1026 24141
Trecchina PZ 12 2316 26457
Morigerati SA 12 665 27122
Casalbuono SA 12 1194 28316
Santa Marina SA 13 3243 31559
Maratea PZ 13 5139 36698
Lauria PZ 14 12919 49617
Caselle in Pittari SA 14 1956 51573
Torre Orsaia SA 19 2118 53691
Montesano sulla Marcellana SA 19 6704 60395
Buonabitacolo SA 19 2549 62944
Sanza SA 19 2608 65552

Municipalities with at least 50000 inhabitants

An earthquake occurred to
60 Km S of Potenza (67122 inhabitants)
82 Km SE of Battipaglia (50786 inhabitants)
99 Km SW of Matera (60436 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
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 2.2 2021-10-17
05:35:08
40.1077 15.6893 10 2022-03-30
13:04:12
Bollettino Sismico Italiano INGV 96795451
Reviewed
Rev100
ML 2.2 2021-10-17
05:35:08
40.1012 15.6935 10 2021-10-17
05:42:08
Sala Sismica INGV-Roma 96673251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-17 05:35:08 ± 0.09
Latitude 40.1077 ± 0.0045
Longitude 15.6893 ± 0.0059
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96795451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 519
Semi-minor axis of confidence ellipse (meter) 360
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 356
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 102
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.95688
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 96673251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-17 05:42:08

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 96795451
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-21 16:48:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IT.LRNO.HNZ. 2021-10-17T05:35:38.60 3.0 positive manual Pn 0.08 0
IV.SPS2.HHZ. 2021-10-17T05:35:28.08 0.6 undecidable manual P 148 0.9569 50 1.48 24
IV.CELI.HHZ. 2021-10-17T05:35:27.05 0.3 undecidable manual P 138 0.9452 50 0.65 54
IV.CDRU.HHZ. 2021-10-17T05:35:25.70 0.6 undecidable manual S 323 0.4811 50 0.04 47
IX.SRN3.HHZ.02 2021-10-17T05:35:24.58 0.6 undecidable manual S 335 0.4173 50 0.82 38
IV.CMPR.HHZ. 2021-10-17T05:35:22.34 0.6 undecidable manual S 306 0.3624 50 0.21 46
IV.MMN.HHZ. 2021-10-17T05:35:21.13 0.6 undecidable manual S 133 0.3166 50 0.36 45
IX.TEGI.HNE.01 2021-10-17T05:35:20.92 0.6 undecidable manual S 337 0.2959 50 0.75 40
IV.CET2.HHZ. 2021-10-17T05:35:20.68 0.3 undecidable manual P 161 0.6133 50 -0.05 68
IV.PTRP.HHN. 2021-10-17T05:35:19.14 0.3 undecidable manual P 34 0.5009 50 0.33 66
IX.VGG3.HNZ.01 2021-10-17T05:35:19.84 0.6 undecidable manual S 35 0.2797 50 0.16 48
IV.SCHR.EHZ. 2021-10-17T05:35:19.92 0.6 undecidable manual S 73 0.3094 50 -0.64 42
IV.CDRU.HHZ. 2021-10-17T05:35:18.08 0.1 undecidable manual P 323 0.4811 50 -0.39 87
IV.MCEL.HHZ. 2021-10-17T05:35:18.18 0.6 undecidable manual S 22 0.2338 111 -0.07 49
IV.SGO.HHZ. 2021-10-17T05:35:18.94 0.3 undecidable manual P 327 0.5378 50 -0.5 63
IV.BULG.HHZ. 2021-10-17T05:35:18.57 0.6 undecidable manual S 263 0.2401 110 0.08 49
IX.PGN3.HHZ.02 2021-10-17T05:35:18.24 0.3 undecidable manual P 10 0.4712 50 -0.06 70
IX.SRN3.HHZ.02 2021-10-17T05:35:17.13 0.1 undecidable manual P 335 0.4173 50 -0.24 91
IV.CMPR.HHZ. 2021-10-17T05:35:16.20 0.1 undecidable manual P 306 0.3624 50 -0.23 92
IV.MTSN.HHZ. 2021-10-17T05:35:16.18 0.6 undecidable manual S 17 0.1655 118 0.32 47
IV.GRIS.EHZ. 2021-10-17T05:35:16.53 0.3 undecidable manual P 161 0.3876 50 -0.34 67
IX.MRN3.HNE. 2021-10-17T05:35:15.94 0.3 undecidable manual P 6 0.3193 50 0.24 69
IV.SCHR.EHZ. 2021-10-17T05:35:15.02 0.1 positive manual P 73 0.3094 50 -0.5 88
IX.TEGI.HNE.01 2021-10-17T05:35:15.28 0.3 undecidable manual P 337 0.2959 50 -0.02 73
IV.SIRI.HHZ. 2021-10-17T05:35:15.66 0.6 undecidable manual S 61 0.1547 119 0.16 49
IV.MMN.HHZ. 2021-10-17T05:35:15.50 0.3 undecidable manual P 133 0.3166 50 -0.14 71
IV.MCEL.HHZ. 2021-10-17T05:35:14.00 0.1 negative manual P 22 0.2338 111 -0.19 95
IV.BULG.HHZ. 2021-10-17T05:35:14.30 0.1 positive manual P 263 0.2401 110 -0.03 98
IX.VGG3.HNZ.01 2021-10-17T05:35:14.93 0.3 undecidable manual P 35 0.2797 50 -0.09 72
IV.MGR.HHZ. 2021-10-17T05:35:13.91 0.3 undecidable manual S 286 0.1079 129 -0.09 75
IV.SIRI.HHZ. 2021-10-17T05:35:12.74 0.1 undecidable manual P 61 0.1547 119 0.14 98
IV.MTSN.HHZ. 2021-10-17T05:35:12.79 0.1 undecidable manual P 17 0.1655 118 -0.02 100
IV.MGR.HHZ. 2021-10-17T05:35:11.88 0.1 undecidable manual P 286 0.1079 129 0.14 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SIRI.HNN. ML:2.5 0.0025800000000000003 0.22 AML other m 2021-10-17T05:35:17.60
IV.SIRI.HHN. ML:2.5 0.00269 0.22 AML other m 2021-10-17T05:35:17.60
IV.MTSN.HNE. ML:2.3 0.001675 0.62 AML other m 2021-10-17T05:35:18.09
IV.MTSN.HHE. ML:2.3 0.001675 0.62 AML other m 2021-10-17T05:35:18.09
IV.SIRI.HNE. ML:2.4 0.00226 0.22 AML other m 2021-10-17T05:35:18.47
IV.SIRI.HHE. ML:2.2 0.0012850000000000001 0.2 AML other m 2021-10-17T05:35:18.64
IV.BULG.HHE. ML:2.2 0.000958 1.46 AML other m 2021-10-17T05:35:19.93
IV.BULG.HNE. ML:2.2 0.000889 1.44 AML other m 2021-10-17T05:35:19.93
IV.MTSN.HNN. ML:2.2 0.001305 0.7 AML other m 2021-10-17T05:35:19.28
IV.MTSN.HHN. ML:2.2 0.001375 0.68 AML other m 2021-10-17T05:35:19.29
IV.BULG.HNN. ML:2.5 0.001795 0.6 AML other m 2021-10-17T05:35:19.45
IV.BULG.HHN. ML:2.5 0.001875 0.6 AML other m 2021-10-17T05:35:19.45
IV.MCEL.HNN. ML:2.5 0.0019 0.7 AML other m 2021-10-17T05:35:19.54
IV.MCEL.HNE. ML:2.6 0.002045 0.82 AML other m 2021-10-17T05:35:20.52
IV.SCHR.EHE. ML:2.2 0.0006039999999999999 1.78 AML other m 2021-10-17T05:35:21.98
IV.MCEL.HHN. ML:2.0 0.000621 0.5 AML other m 2021-10-17T05:35:21.70
IV.MCEL.HHE. ML:2.1 0.0007749999999999999 0.28 AML other m 2021-10-17T05:35:21.70
IV.SCHR.EHN. ML:2.1 0.0005895 0.18 AML other m 2021-10-17T05:35:21.80
IV.CMPR.HHN. ML:2.1 0.000443 0.26 AML other m 2021-10-17T05:35:23.18
IV.CMPR.HHE. ML:2.1 0.0004555 0.24 AML other m 2021-10-17T05:35:23.21
IV.GRIS.EHN. ML:1.9 0.00027649999999999994 0.46 AML other m 2021-10-17T05:35:23.72
IV.MMN.HHN. ML:2.2 0.000722 1.52 AML other m 2021-10-17T05:35:24.13
IV.GRIS.EHE. ML:1.9 0.000266 1.3 AML other m 2021-10-17T05:35:24.65
IV.MMN.HHE. ML:2.1 0.000484 0.5 AML other m 2021-10-17T05:35:24.98
IV.CDRU.HHE. ML:1.8 0.00014050000000000003 0.7 AML other m 2021-10-17T05:35:27.25
IV.CDRU.HNE. ML:2.1 0.000323 0.3 AML other m 2021-10-17T05:35:27.50
IX.SRN3.HHN.02 ML:2.5 0.0008715000000000001 0.4 AML other m 2021-10-17T05:35:28.69
IX.SRN3.HHE.02 ML:2.3 0.0005935000000000001 0.34 AML other m 2021-10-17T05:35:29.59
IV.CDRU.HHN. ML:1.8 0.00015099999999999998 0.34 AML other m 2021-10-17T05:35:33.12
IV.CDRU.HNN. ML:1.8 0.000154 0.34 AML other m 2021-10-17T05:35:33.12
IV.CELI.HHE. ML:1.6 0.00003435 1.56 AML other m 2021-10-17T05:35:43.89
IV.SPS2.HHE. ML:1.6 0.00004185 0.7 AML other m 2021-10-17T05:35:44.56
IV.SPS2.HHN. ML:1.4 0.0000272 1.74 AML other m 2021-10-17T05:35:45.89
IV.CELI.HHN. ML:1.4 0.000024599999999999998 1.5 AML other m 2021-10-17T05:35:50.14
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