Earthquake with magnitude of ML 0.8 on date 31-10-2021 and time 10:10:36 (Italy) in region 3 km NE Sassano (SA)

A magnitude ML 0.8 earthquake occured in region: 3 km NE Sassano (SA), on

  • 31-10-2021 09:10:36 (UTC)
  • 31-10-2021 10:10:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.366, 15.582 at 18 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
Sassano SA 3 5013 5013
Teggiano SA 4 7976 12989
Monte San Giacomo SA 4 1572 14561
Sala Consilina SA 4 12664 27225
Padula SA 7 5368 32593
Atena Lucana SA 10 2336 34929
Buonabitacolo SA 11 2549 37478
San Rufo SA 13 1754 39232
San Pietro al Tanagro SA 13 1695 40927
Paterno PZ 13 3368 44295
Brienza PZ 13 4078 48373
Sanza SA 14 2608 50981
Montesano sulla Marcellana SA 14 6704 57685
Sant'Arsenio SA 14 2815 60500
Marsico Nuovo PZ 14 4098 64598
Sasso di Castalda PZ 16 835 65433
Piaggine SA 17 1311 66744
Sacco SA 18 492 67236
Tramutola PZ 18 3089 70325
Polla SA 18 5279 75604
Valle dell'Angelo SA 18 248 75852
Corleto Monforte SA 19 592 76444
Casalbuono SA 19 1194 77638

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SW of Potenza (67122 inhabitants)
57 Km E of Battipaglia (50786 inhabitants)
78 Km E of Salerno (135261 inhabitants)
83 Km E of Cava de' Tirreni (53659 inhabitants)
90 Km SE of Avellino (54857 inhabitants)
92 Km W of Matera (60436 inhabitants)
97 Km SW of Altamura (70396 inhabitants)
99 Km E of Scafati (50787 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 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
Reviewed
Rev100
ML 0.8 2021-10-31
09:10:36
40.366 15.582 18 2021-10-31
09:17:50
Sala Sismica INGV-Roma 97106731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-31 09:10:36 ± 0.28
Latitude 40.3660 ± 0.0144
Longitude 15.5820 ± 0.0106
Depth (km) 18 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97106731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1464
Semi-minor axis of confidence ellipse (meter) 880
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 156
Circular confidence region, given by single value of horizontal uncertainty (meter) 1460
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 199
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.24462
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 4
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 97106731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-31 09:17:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GRIS.EHZ. 2021-10-31T09:10:51.98 3.0 undecidable manual P 0 0
IV.CMPR.HHZ. 2021-10-31T09:10:45.63 0.3 undecidable manual S 257 0.2176 116 0.09 72
IV.CDRU.HHZ. 2021-10-31T09:10:45.86 0.3 undecidable manual S 300 0.2446 113 -0.4 67
IX.SRN3.HHZ.02 2021-10-31T09:10:44.06 0.3 undecidable manual S 322 0.1529 128 0.16 72
IV.CDRU.HHZ. 2021-10-31T09:10:42.01 0.1 undecidable manual P 300 0.2446 113 0.01 97
IV.CMPR.HHZ. 2021-10-31T09:10:41.75 0.1 undecidable manual P 257 0.2176 116 0.17 95
IV.SLCN.HHZ. 2021-10-31T09:10:41.84 0.3 undecidable manual S 58 0.0459 161 -0.19 72
IX.SRN3.HHZ.02 2021-10-31T09:10:40.62 0.1 undecidable manual P 322 0.1529 128 -0.02 99
IV.SLCN.HHZ. 2021-10-31T09:10:39.63 0.1 undecidable manual P 58 0.0459 161 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SLCN.HHE. ML:1 8.615E-5 0.52 AML other m 2021-10-31T09:10:42.04
IV.SLCN.HHN. ML:0.9 7.72E-5 0.2 AML other m 2021-10-31T09:10:42.08
IX.SRN3.HHE.02 ML:0.7 3.395E-5 0.28 AML other m 2021-10-31T09:10:44.41
IX.SRN3.HHN.02 ML:0.5 1.91202E-5 0.16 AML other m 2021-10-31T09:10:45.71
IV.SLCN.HNE. ML:1.2 0.000138441115 0.7168 AML other m 2021-10-31T09:10:39.20
IV.SLCN.HNN. ML:1.2 0.00015103724 0.5696 AML other m 2021-10-31T09:10:43.58
IV.CMPR.HNE. ML:0.7 2.5140405E-5 0.5888 AML other m 2021-10-31T09:10:54.67
IV.CMPR.HNN. ML:0.9 4.292767E-5 0.768 AML other m 2021-10-31T09:10:50.46
IV.CMPR.HHE. ML:0.5 1.3130202E-5 0.16 AML other m 2021-10-31T09:10:46.01
IV.CMPR.HHN. ML:0.3 9.813641E-6 0.1984 AML other m 2021-10-31T09:10:46.16
IV.CDRU.HNE. ML:1.1 5.630301E-5 0.9216 AML other m 2021-10-31T09:10:52.59
IV.CDRU.HNN. ML:1.1 6.46197975E-5 0.5504 AML other m 2021-10-31T09:10:48.18
IV.CDRU.HHE. ML:0.5 1.426633E-5 0.0832 AML other m 2021-10-31T09:10:47.64
IV.CDRU.HHN. ML:0.3 7.6090105E-6 0.1024 AML other m 2021-10-31T09:10:46.79
IV.GRIS.EHE. ML:1.1 1.8228395E-5 1.2992 AML other m 2021-10-31T09:11:10.35
IV.GRIS.EHN. ML:0.8 1.0392726E-5 0.7808 AML other m 2021-10-31T09:11:24.31
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