Earthquake with magnitude of ML 1.1 on date 23-08-2021 and time 05:08:27 (Italy) in region 3 km SW Casalbuono (SA)

A magnitude ML 1.1 earthquake occured in region: 3 km SW Casalbuono (SA), on

  • 23-08-2021 03:08:27 (UTC)
  • 23-08-2021 05:08:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.198, 15.664 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
Casalbuono SA 3 1194 1194
Casaletto Spartano SA 6 1420 2614
Tortorella SA 8 523 3137
Buonabitacolo SA 9 2549 5686
Montesano sulla Marcellana SA 9 6704 12390
Torraca SA 10 1263 13653
Caselle in Pittari SA 11 1956 15609
Sanza SA 11 2608 18217
Morigerati SA 11 665 18882
Lagonegro PZ 12 5584 24466
Vibonati SA 13 3293 27759
Sapri SA 14 6770 34529
Santa Marina SA 15 3243 37772
Ispani SA 15 1026 38798
Rivello PZ 16 2767 41565
Padula SA 16 5368 46933
Tramutola PZ 17 3089 50022
Torre Orsaia SA 18 2118 52140
Sassano SA 18 5013 57153
Moliterno PZ 18 4062 61215
Nemoli PZ 19 1495 62710
Monte San Giacomo SA 19 1572 64282
Sarconi PZ 20 1404 65686

Municipalities with at least 50000 inhabitants

An earthquake occurred to
51 Km S of Potenza (67122 inhabitants)
74 Km SE of Battipaglia (50786 inhabitants)
93 Km SE of Salerno (135261 inhabitants)
95 Km SW of Matera (60436 inhabitants)
99 Km SE of Cava de' Tirreni (53659 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 1.1 2021-08-23
03:08:27
40.1985 15.6643 11 2021-08-23
03:16:02
Sala Sismica INGV-Roma 94522461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-23 03:08:27 ± 0.05
Latitude 40.1985 ± 0.0036
Longitude 15.6643 ± 0.0035
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94522461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 389
Semi-minor axis of confidence ellipse (meter) 230
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 189
Circular confidence region, given by single value of horizontal uncertainty (meter) 390
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.32735
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 94522461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-23 03:16:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MCIV.CHZ. 2021-08-23T03:10:15.10 3.0 undecidable manual Sn -7.42 0
IV.FIR.HHZ. 2021-08-23T03:09:55.02 3.0 undecidable manual Pg 15.98 0
IV.MMGO.HHZ. 2021-08-23T03:09:51.03 3.0 undecidable manual Sg 6.1 0
CR.STON.BHZ. 2021-08-23T03:09:51.88 3.0 undecidable manual Sn -1.73 0
IV.MURB.HHZ. 2021-08-23T03:09:28.58 3.0 undecidable manual Pn 3.13 0
IV.HPAC.HHZ. 2021-08-23T03:09:10.16 3.0 undecidable manual Pg 7.08 0
IX.NSC3.EHZ.02 2021-08-23T03:09:05.60 3.0 undecidable manual Sg 0.33 0
IV.EFIU.HHZ. 2021-08-23T03:08:47.68 3.0 positive manual Pn -0.82 0
IV.CMPR.HHE. 2021-08-23T03:08:39.01 0.3 undecidable manual S 294 0.3004 50 -0.01 74
IV.SCHR.EHZ. 2021-08-23T03:08:39.11 0.6 undecidable manual S 90 0.3139 50 -0.32 46
IX.SRN3.HHE. 2021-08-23T03:08:39.74 0.6 undecidable manual S 331 0.3274 50 -0.08 48
MN.CUC.HHZ. 2021-08-23T03:08:37.19 0.6 undecidable manual S 150 0.2347 50 0.11 49
IX.SRN3.HHE. 2021-08-23T03:08:34.88 0.1 undecidable manual P 331 0.3274 50 0.25 94
IV.CMPR.HHE. 2021-08-23T03:08:34.21 0.1 undecidable manual P 294 0.3004 50 0.04 98
IV.SCHR.EHZ. 2021-08-23T03:08:34.25 0.3 undecidable manual P 90 0.3139 50 -0.15 72
IV.SIRI.HHZ. 2021-08-23T03:08:34.88 0.3 undecidable manual S 96 0.1556 121 0.31 72
MN.CUC.HHZ. 2021-08-23T03:08:33.03 0.1 undecidable manual P 150 0.2347 50 -0.02 100
IV.SLCN.HHZ. 2021-08-23T03:08:33.22 3.0 undecidable manual P -0.8 0
IV.CDRU.HHZ. 2021-08-23T03:08:32.46 3.0 undecidable manual Pn -5.46 0
IV.MTSN.HHE. 2021-08-23T03:08:32.57 0.3 undecidable manual S 44 0.0953 135 -0.14 75
IV.MGR.HHZ. 2021-08-23T03:08:32.85 0.3 undecidable manual S 234 0.1043 132 -0.12 75
IV.SIRI.HHZ. 2021-08-23T03:08:31.61 0.6 undecidable manual P 96 0.1556 121 0.01 51
IV.MCEL.HHZ. 2021-08-23T03:08:31.82 3.0 positive manual P -0.11 0
IV.MTSN.HHE. 2021-08-23T03:08:30.48 0.3 undecidable manual P 44 0.0953 135 -0.04 77
IV.MGR.HHZ. 2021-08-23T03:08:30.65 0.3 undecidable manual P 234 0.1043 132 -0.02 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MGR.HHN. ML:1 0.00010135 0.64 AML other m 2021-08-23T03:08:32.97
IV.MGR.HHE. ML:1.1 0.000151 0.26 AML other m 2021-08-23T03:08:33.57
IV.MCEL.HHE. ML:1.3 0.0001715 0.2 AML other m 2021-08-23T03:08:35.03
IV.MCEL.HHN. ML:0.9 5.755E-5 0.24 AML other m 2021-08-23T03:08:36.81
IV.MCEL.HNE. ML:1.4 0.00019645135 0.3008 AML other m 2021-08-23T03:08:36.94
MN.CUC.HHN. ML:0.6 2.685836E-5 0.24 AML other m 2021-08-23T03:08:37.56
IV.MCEL.HNN. ML:1.4 0.00018 0.62 AML other m 2021-08-23T03:08:37.73
IV.SLCN.HHE. ML:1 7.14E-5 0.56 AML other m 2021-08-23T03:08:38.73
MN.CUC.HHE. ML:0.8 3.582814E-5 0.2 AML other m 2021-08-23T03:08:38.31
IV.SCHR.EHN. ML:0.7 2.085E-5 0.1 AML other m 2021-08-23T03:08:39.20
IV.SCHR.EHE. ML:0.7 1.762773E-5 0.3008 AML other m 2021-08-23T03:08:41.87
IV.SLCN.HHN. ML:0.9 5.185E-5 0.34 AML other m 2021-08-23T03:08:43.10
IV.MGR.HNE. ML:1.1 0.000132050325 0.2592 AML other m 2021-08-23T03:08:33.57
IV.MGR.HNN. ML:1.1 0.000142299275 0.8496 AML other m 2021-08-23T03:08:47.46
MN.CUC.HNE. ML:1.4 0.000136746925 0.52 AML other m 2021-08-23T03:08:32.70
MN.CUC.HNN. ML:1.4 0.0001242386 1.52 AML other m 2021-08-23T03:08:48.07
IV.SLCN.HNE. ML:1.3 0.0001371763 0.3808 AML other m 2021-08-23T03:08:39.28
IV.SLCN.HNN. ML:1.6 0.00025115275 1.2 AML other m 2021-08-23T03:08:41.95
IV.EFIU.HHE. ML:2.7 8.343087E-5 1.1792 AML other m 2021-08-23T03:08:47.27
IV.EFIU.HHN. ML:2.6 6.2386795E-5 1.1408 AML other m 2021-08-23T03:09:30.23
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