Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 13-04-2021 and time 04:17:22 (Italy) in region 2 km S Sassano (SA)

A magnitude ML 1.3 earthquake occured in region: 2 km S Sassano (SA), on

  • 13-04-2021 02:17:22 (UTC)
  • 13-04-2021 04:17:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.3250, 15.5670 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.

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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 2 5013 5013
Monte San Giacomo SA 3 1572 6585
Teggiano SA 7 7976 14561
Buonabitacolo SA 8 2549 17110
Padula SA 8 5368 22478
Sanza SA 9 2608 25086
Sala Consilina SA 9 12664 37750
Montesano sulla Marcellana SA 13 6704 44454
Atena Lucana SA 15 2336 46790
San Rufo SA 15 1754 48544
Paterno PZ 15 3368 51912
Casalbuono SA 16 1194 53106
San Pietro al Tanagro SA 16 1695 54801
Piaggine SA 16 1311 56112
Valle dell'Angelo SA 17 248 56360
Caselle in Pittari SA 17 1956 58316
Rofrano SA 17 1576 59892
Sacco SA 18 492 60384
Sant'Arsenio SA 18 2815 63199
Marsico Nuovo PZ 18 4098 67297
Brienza PZ 18 4078 71375
Tramutola PZ 19 3089 74464
Laurino SA 20 1548 76012
Casaletto Spartano SA 20 1420 77432

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km SW of Potenza (67122 inhabitants)
59 Km SE of Battipaglia (50786 inhabitants)
79 Km SE of Salerno (135261 inhabitants)
84 Km SE of Cava de' Tirreni (53659 inhabitants)
92 Km SE of Avellino (54857 inhabitants)
95 Km W of Matera (60436 inhabitants)
100 Km E of Scafati (50787 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.3 2021-04-13
02:17:22		 40.3252 15.5673 10 2021-07-12
16:55:15		 Bollettino Sismico Italiano INGV 91326001
Reviewed
Rev100 		ML 1.4 2021-04-13
02:17:22		 40.3295 15.5617 8 2021-04-13
02:21:26		 Sala Sismica INGV-Roma 89047261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-13 02:17:22 ± 0.08
Latitude 40.3252 ± 0.0045
Longitude 15.5673 ± 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 91326001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 485
Semi-minor axis of confidence ellipse (meter) 399
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 303
Circular confidence region, given by single value of horizontal uncertainty (meter) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.05936
Epicentral distance of station farthest from the epicenter (degree) 0.38131
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 89047261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-13 02:21:26

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 91326001
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-15 11:12:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
MN.CUC.HHZ. 2021-04-13T02:17:36.55 0.6 undecidable manual S 150 42.3243 50 0.41 44
IV.CDRU.HHZ. 2021-04-13T02:17:32.23 0.6 undecidable manual S 310 28.749 50 -0.27 46
IX.STN3.HHZ.02 2021-04-13T02:17:31.87 0.6 undecidable manual S 17 23.8539 50 0.68 42
IX.SRN3.HHZ. 2021-04-13T02:17:30.32 0.6 undecidable manual S 333 20.0688 117 0.25 47
IV.MGR.HHZ. 2021-04-13T02:17:30.37 0.6 undecidable manual S 183 20.868 116 0.07 49
IV.CMPR.HHZ. 2021-04-13T02:17:30.74 0.6 undecidable manual S 268 22.3554 115 -0.04 49
MN.CUC.HHZ. 2021-04-13T02:17:30.39 0.6 undecidable manual P 150 42.3243 50 0.13 47
IX.MRN3.HNZ.01 2021-04-13T02:17:29.43 0.6 undecidable manual S 51 17.6712 120 0.09 49
IV.MCEL.HHZ. 2021-04-13T02:17:29.89 0.6 undecidable manual S 90 19.869 118 -0.1 49
IX.CGG3.HNZ.01 2021-04-13T02:17:28.35 0.3 undecidable manual P 351 24.3534 50 0.86 58
IX.STN3.HHZ.02 2021-04-13T02:17:27.06 0.3 undecidable manual P 17 23.8539 50 -0.34 69
IV.CDRU.HHZ. 2021-04-13T02:17:27.72 0.1 undecidable manual P 310 28.749 50 -0.44 89
IV.CMPR.HHZ. 2021-04-13T02:17:27.19 0.1 positive manual P 268 22.3554 115 0.03 98
IV.MCEL.HHZ. 2021-04-13T02:17:26.35 0.1 undecidable manual P 90 19.869 118 -0.36 92
IX.SRN3.HHZ. 2021-04-13T02:17:26.51 0.1 undecidable manual P 333 20.0688 117 -0.25 94
IV.MGR.HHZ. 2021-04-13T02:17:26.96 0.1 positive manual P 183 20.868 116 0.08 98
IX.TEGI.HNZ. 2021-04-13T02:17:26.58 0.6 undecidable manual S 337 6.5934 147 0.09 50
IV.SLCN.HHZ. 2021-04-13T02:17:26.97 0.6 undecidable manual S 38 9.0798 139 -0.04 50
IX.MRN3.HNZ.01 2021-04-13T02:17:26.06 0.3 undecidable manual P 51 17.6712 120 -0.27 71
IT.SLC1.HGZ. 2021-04-13T02:17:26.96 0.6 undecidable manual S 17 8.1807 142 0.16 49
IV.SLCN.HHZ. 2021-04-13T02:17:24.91 0.1 negative manual P 38 9.0798 139 -0.08 100
IT.SLC1.HGZ. 2021-04-13T02:17:24.92 0.1 undecidable manual P 17 8.1807 142 0.05 100
IX.TEGI.HNZ. 2021-04-13T02:17:24.89 0.1 undecidable manual P 337 6.5934 147 0.2 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SLCN.HNE. ML:1.6 0.000482 0.96 AML other m 2021-04-13T02:17:27.83
IV.SLCN.HNN. ML:1.8 0.0007545 0.34 AML other m 2021-04-13T02:17:27.58
IV.SLCN.HHN. ML:1.8 0.0007624999999999999 0.34 AML other m 2021-04-13T02:17:27.58
IV.SLCN.HHE. ML:1.7 0.000612 0.32 AML other m 2021-04-13T02:17:27.99
IV.MCEL.HHE. ML:1.2 0.00011350000000000001 0.86 AML other m 2021-04-13T02:17:30.27
IV.MCEL.HHN. ML:1.4 0.00017299999999999998 0.34 AML other m 2021-04-13T02:17:31.33
IV.MGR.HHN. ML:1.3 0.000132 0.54 AML other m 2021-04-13T02:17:32.65
IV.CDRU.HHE. ML:1.3 0.00010075000000000001 0.92 AML other m 2021-04-13T02:17:32.52
IV.CDRU.HHN. ML:1.0 0.00005 0.2 AML other m 2021-04-13T02:17:33.25
IV.MGR.HHE. ML:1.1 0.00008575000000000001 1.5 AML other m 2021-04-13T02:17:34.00
IV.CMPR.HHN. ML:1.0 0.0000624 0.56 AML other m 2021-04-13T02:17:34.19
IV.CMPR.HHE. ML:1.0 0.00006205 0.38 AML other m 2021-04-13T02:17:34.81
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