Earthquake with magnitude of ML 0.9 on date 31-07-2020 and time 05:55:40 (Italy) in region 4 km S Sasso di Castalda (PZ)

A magnitude ML 0.9 earthquake occured in region: 4 km S Sasso di Castalda (PZ), on

  • 31-07-2020 03:55:40 (UTC)
  • 31-07-2020 05:55:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.45, 15.67 at 16 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
Sasso di Castalda PZ 4 835 835
Brienza PZ 5 4078 4913
Marsico Nuovo PZ 6 4098 9011
Sala Consilina SA 9 12664 21675
Paterno PZ 10 3368 25043
Atena Lucana SA 10 2336 27379
Satriano di Lucania PZ 11 2374 29753
Padula SA 12 5368 35121
Abriola PZ 14 1531 36652
Teggiano SA 14 7976 44628
Sant'Angelo Le Fratte PZ 14 1429 46057
Tito PZ 15 7332 53389
Sassano SA 15 5013 58402
Calvello PZ 15 1948 60350
Marsicovetere PZ 16 5546 65896
San Pietro al Tanagro SA 16 1695 67591
Sant'Arsenio SA 16 2815 70406
Monte San Giacomo SA 16 1572 71978
Polla SA 17 5279 77257
Savoia di Lucania PZ 17 1127 78384
Pignola PZ 17 6962 85346
Tramutola PZ 17 3089 88435
San Rufo SA 18 1754 90189
Montesano sulla Marcellana SA 20 6704 96893
Caggiano SA 20 2765 99658

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km SW of Potenza (67122 inhabitants)
61 Km E of Battipaglia (50786 inhabitants)
81 Km E of Salerno (135261 inhabitants)
82 Km W of Matera (60436 inhabitants)
85 Km SW of Altamura (70396 inhabitants)
86 Km E of Cava de' Tirreni (53659 inhabitants)
90 Km SE of Avellino (54857 inhabitants)
93 Km S of Cerignola (58396 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 0.9 2020-07-31
03:55:40
40.45 15.67 16 2020-07-31
04:01:39
Sala Sismica INGV-Roma 81501661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-31 03:55:40 ± 0.16
Latitude 40.45 ± 0.01
Longitude 15.67 ± 0.01
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81501661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 550
Semi-minor axis of confidence ellipse (meter) 374
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 301
Circular confidence region, given by single value of horizontal uncertainty (meter) 550
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.05036
Epicentral distance of station farthest from the epicenter (degree) 0.32555
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 81501661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-31 04:01:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MGR.HHZ. 2020-07-31T03:55:52.56 0.3 undecidable manual S 196 0.3256 102 -0.12 69
IV.CMPR.HHZ. 2020-07-31T03:55:51.93 0.3 undecidable manual S 245 0.3112 103 -0.32 67
IV.CAGG.EHN. 2020-07-31T03:55:48.20 0.3 undecidable manual S 311 0.1619 121 0.06 73
IV.MGR.HHZ. 2020-07-31T03:55:48.15 0.6 undecidable manual P 196 0.3256 102 0.65 41
IV.MCEL.HHZ. 2020-07-31T03:55:48.44 0.3 undecidable manual S 142 0.1601 122 0.36 68
IX.SRN3.HNE.02 2020-07-31T03:55:48.73 0.3 undecidable manual S 282 0.1673 120 0.47 67
IX.CGG3.HNN.01 2020-07-31T03:55:48.00 0.6 undecidable manual S 309 0.1457 125 0.26 47
IX.PGN3.HNE.02 2020-07-31T03:55:47.48 0.3 undecidable manual S 38 0.1538 123 -0.45 67
IX.STN3.HNZ.01 2020-07-31T03:55:46.28 0.3 undecidable manual S 349 0.0809 145 -0.09 74
IV.CMPR.HHZ. 2020-07-31T03:55:46.78 0.3 undecidable manual P 245 0.3112 103 -0.47 64
IV.SLCN.HHZ. 2020-07-31T03:55:46.20 0.3 undecidable manual S 206 0.0674 150 0.04 74
IX.PGN3.HNE.02 2020-07-31T03:55:45.08 0.3 undecidable manual P 38 0.1538 123 0.32 70
IX.MRN3.HNN.01 2020-07-31T03:55:45.60 0.1 undecidable manual S 120 0.0504 157 -0.33 95
IV.CAGG.EHN. 2020-07-31T03:55:45.00 0.3 undecidable manual P 311 0.1619 121 0.12 72
IX.SRN3.HNE.02 2020-07-31T03:55:44.79 0.1 undecidable manual P 282 0.1673 120 -0.16 95
IX.CGG3.HNN.01 2020-07-31T03:55:44.72 0.3 undecidable manual P 309 0.1457 125 0.07 73
IX.TEGI.HNN.01 2020-07-31T03:55:44.29 0.3 undecidable manual P 236 0.125 131 -0.08 73
IV.MCEL.HHZ. 2020-07-31T03:55:44.95 0.3 undecidable manual P 142 0.1601 122 0.11 73
IX.STN3.HNZ.01 2020-07-31T03:55:43.86 0.1 positive manual P 349 0.0809 145 0 100
IV.SLCN.HHZ. 2020-07-31T03:55:43.80 0.1 undecidable manual P 206 0.0674 150 0.06 99
IX.MRN3.HNN.01 2020-07-31T03:55:43.47 0.3 undecidable manual P 120 0.0504 157 -0.14 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SLCN.HHN. ML:1.2 0.000133 0.26 AML other m 2020-07-31T03:55:46.39
IV.SLCN.HHE. ML:1.2 0.0001395 0.32 AML other m 2020-07-31T03:55:46.35
IV.MCEL.HHE. ML:1 7.095E-5 0.14 AML other m 2020-07-31T03:55:48.62
IV.MCEL.HHN. ML:0.9 5.605E-5 0.2 AML other m 2020-07-31T03:55:48.55
IV.CMPR.HHN. ML:0.4 9.49E-6 0.38 AML other m 2020-07-31T03:55:52.02
IV.CMPR.HHE. ML:0.4 1.009E-5 0.82 AML other m 2020-07-31T03:55:52.48
IV.SLCN.HNE. ML:1.1 0.0001246047595 0.2496 AML other m 2020-07-31T03:55:47.44
IV.MCEL.HNE. ML:1 6.444769E-5 0.16 AML other m 2020-07-31T03:55:48.63
IV.MCEL.HNN. ML:0.9 5.55283E-5 0.1984 AML other m 2020-07-31T03:55:48.55
IV.MGR.HHE. ML:0.4 1.066834E-5 0.1984 AML other m 2020-07-31T03:55:52.53
IV.MGR.HHN. ML:0.4 1.1672325E-5 0.3392 AML other m 2020-07-31T03:55:53.39
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download