Earthquake with magnitude of ML 0.5 on date 21-07-2021 and time 05:22:41 (Italy) in region 5 km E Casaletto Spartano (SA)

A magnitude ML 0.5 earthquake occured in region: 5 km E Casaletto Spartano (SA), on

  • 21-07-2021 03:22:41 (UTC)
  • 21-07-2021 05:22:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.162, 15.677 at 10 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Casaletto Spartano SA 5 1420 1420
Casalbuono SA 6 1194 2614
Tortorella SA 6 523 3137
Torraca SA 7 1263 4400
Lagonegro PZ 9 5584 9984
Vibonati SA 10 3293 13277
Sapri SA 10 6770 20047
Morigerati SA 11 665 20712
Caselle in Pittari SA 11 1956 22668
Rivello PZ 12 2767 25435
Ispani SA 13 1026 26461
Buonabitacolo SA 13 2549 29010
Montesano sulla Marcellana SA 13 6704 35714
Santa Marina SA 13 3243 38957
Sanza SA 14 2608 41565
Nemoli PZ 15 1495 43060
Trecchina PZ 17 2316 45376
Torre Orsaia SA 18 2118 47494
Lauria PZ 19 12919 60413
Moliterno PZ 19 4062 64475
Maratea PZ 19 5139 69614

Municipalities with at least 50000 inhabitants

An earthquake occurred to
54 Km S of Potenza (67122 inhabitants)
77 Km SE of Battipaglia (50786 inhabitants)
96 Km SW of Matera (60436 inhabitants)
97 Km SE of Salerno (135261 inhabitants)
Recent and historical seismicity
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 the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.5 2021-07-21
03:22:41
40.1617 15.6768 11 2021-07-21
03:36:39
Sala Sismica INGV-Roma 93005001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-21 03:22:41 ± 0.17
Latitude 40.1617 ± 0.0090
Longitude 15.6768 ± 0.0118
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93005001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 923
Semi-minor axis of confidence ellipse (meter) 788
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 243
Circular confidence region, given by single value of horizontal uncertainty (meter) 920
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 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.09713
Epicentral distance of station farthest from the epicenter (degree) 0.43347
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 93005001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-21 03:36:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CDRU.HHZ. 2021-07-21T03:22:57.08 0.6 undecidable manual S 319 0.4335 50 -0.3 45
MN.CUC.HHZ. 2021-07-21T03:22:51.09 0.3 undecidable manual S 148 0.1988 115 0.7 63
IV.CDRU.HHZ. 2021-07-21T03:22:50.56 0.3 undecidable manual P 319 0.4335 50 -0.29 68
IV.MCEL.HHZ. 2021-07-21T03:22:49.79 0.6 undecidable manual S 30 0.1889 116 -0.28 48
IV.MGR.HHZ. 2021-07-21T03:22:47.08 0.3 undecidable manual S 256 0.0971 134 -0.07 76
IV.MTSN.HHN. 2021-07-21T03:22:47.86 0.6 undecidable manual S 29 0.1187 128 0.08 50
IV.SLCN.HHZ. 2021-07-21T03:22:47.95 0.1 undecidable manual P 352 0.2311 50 0.57 88
IV.MCEL.HHZ. 2021-07-21T03:22:46.73 0.1 undecidable manual P 30 0.1889 116 0.1 99
MN.CUC.HHZ. 2021-07-21T03:22:46.15 0.1 undecidable manual P 148 0.1988 115 -0.67 85
IV.SIRI.HHZ. 2021-07-21T03:22:45.50 0.1 undecidable manual P 82 0.1466 123 -0.32 95
IV.MGR.HHZ. 2021-07-21T03:22:45.08 0.1 undecidable manual P 256 0.0971 134 0.14 100
IV.MTSN.HHN. 2021-07-21T03:22:45.48 0.1 undecidable manual P 29 0.1187 128 0.17 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SIRI.HHN. ML:0.5 3.14E-5 0.68 AML other m 2021-07-21T03:22:50.02
MN.CUC.HHE. ML:0.7 2.975E-5 1.2 AML other m 2021-07-21T03:22:51.17
MN.CUC.HHN. ML:0.5 2.065E-5 1.34 AML other m 2021-07-21T03:22:51.80
IV.SIRI.HHE. ML:0.4 2.085E-5 0.7 AML other m 2021-07-21T03:22:51.56
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