Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 20-04-2013 and time 08:16:06 (Italy) in region 1 km NE Torraca (SA)

A magnitude ML 2.3 earthquake occured in region: 1 km NE Torraca (SA), on

  • 20-04-2013 06:16:06 (UTC)
  • 20-04-2013 08:16:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.1180, 15.6400 at 11 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
Torraca SA 1 1263 1263
Tortorella SA 4 523 1786
Casaletto Spartano SA 4 1420 3206
Sapri SA 5 6770 9976
Vibonati SA 5 3293 13269
Ispani SA 8 1026 14295
Morigerati SA 8 665 14960
Santa Marina SA 9 3243 18203
Caselle in Pittari SA 10 1956 20159
Lagonegro PZ 11 5584 25743
Rivello PZ 11 2767 28510
Casalbuono SA 11 1194 29704
Torre Orsaia SA 14 2118 31822
Nemoli PZ 15 1495 33317
Maratea PZ 15 5139 38456
Trecchina PZ 16 2316 40772
Sanza SA 16 2608 43380
Buonabitacolo SA 17 2549 45929
Roccagloriosa SA 17 1722 47651
San Giovanni a Piro SA 18 3780 51431
Montesano sulla Marcellana SA 18 6704 58135
Lauria PZ 19 12919 71054
Alfano SA 19 1023 72077

Municipalities with at least 50000 inhabitants

An earthquake occurred to
60 Km S of Potenza (67122 inhabitants)
78 Km SE of Battipaglia (50786 inhabitants)
97 Km SE of Salerno (135261 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 2.3 2013-04-20
06:16:06		 40.1182 15.6405 11 2015-01-20
11:24:33		 Bollettino Sismico Italiano INGV 5395261
Reviewed
Rev100 		ML 2.3 2013-04-20
06:16:06		 40.1238 15.6378 10 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 3226191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2013-04-20 06:16:06 ± 0.1
Latitude 40.1182 ± 0.0063
Longitude 15.6405 ± 0.0071
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 5395261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 663
Semi-minor axis of confidence ellipse (meter) 582
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 219
Circular confidence region, given by single value of horizontal uncertainty (meter) 660.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106
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) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.06925
Epicentral distance of station farthest from the epicenter (degree) 0.96947
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 3226191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2013-04-20 06:35:20

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 5395261
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2015-01-15 13:06:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAR1.HHZ. 2013-04-20T06:16:25.47 0.6 undecidable manual P 153 107.6145 50 0.81 33
IV.ACER.HHZ. 2013-04-20T06:16:20.53 0.6 undecidable manual P 19 78.4659 50 0.37 41
IV.MCRV.HHZ. 2013-04-20T06:16:20.51 0.6 undecidable manual P 332 83.7495 50 -0.48 39
IV.CMPR.HHZ. 2013-04-20T06:16:18.90 0.6 undecidable manual S 308 36.1416 50 0.11 47
IV.SCHR.EHZ. 2013-04-20T06:16:18.87 0.6 undecidable manual S 76 38.0286 50 -0.41 44
IV.SALB.HHZ. 2013-04-20T06:16:18.05 0.6 undecidable manual P 114 65.5899 50 -0.14 44
IV.T0702.EHZ. 2013-04-20T06:16:16.87 0.3 undecidable manual P 139 57.9975 50 -0.14 67
IV.MTSN.HHZ. 2013-04-20T06:16:15.04 0.6 undecidable manual S 30 18.9699 50 0.85 38
IV.BULG.HHZ. 2013-04-20T06:16:15.58 0.6 undecidable manual S 259 22.755 50 0.37 46
IV.CDRU.HHZ. 2013-04-20T06:16:15.28 0.1 negative manual P 326 50.0166 50 -0.51 83
IV.T0721.EHZ. 2013-04-20T06:16:14.08 0.3 undecidable manual P 125 34.9428 50 0.62 62
IV.SIRI.HHZ. 2013-04-20T06:16:14.92 0.6 undecidable manual S 70 20.4684 50 0.31 46
MN.CUC.HHZ. 2013-04-20T06:16:14.23 0.6 undecidable manual S 133 20.2686 50 -0.32 46
IV.CMPR.HHZ. 2013-04-20T06:16:13.33 0.1 negative manual P 308 36.1416 50 -0.32 89
IV.SCHR.EHZ. 2013-04-20T06:16:13.60 0.1 positive manual P 76 38.0286 50 -0.33 89
IV.MCEL.HHZ. 2013-04-20T06:16:12.15 0.1 positive manual P 31 26.6511 50 -0.04 96
IV.SLCN.HHZ. 2013-04-20T06:16:12.91 0.3 negative manual P 359 30.1476 50 0.19 70
IV.BULG.HHZ. 2013-04-20T06:16:11.66 0.1 positive manual P 259 22.755 50 0.08 97
MN.CUC.HHZ. 2013-04-20T06:16:11.01 0.1 undecidable manual P 133 20.2686 50 -0.19 94
IV.MTSN.HHZ. 2013-04-20T06:16:11.10 0.1 positive manual P 30 18.9699 50 0.11 97
IV.MGR.HHZ. 2013-04-20T06:16:11.24 0.3 undecidable manual S 286 7.6812 145 0 73
IV.SIRI.HHZ. 2013-04-20T06:16:11.19 0.1 positive manual P 70 20.4684 50 -0.05 97
IV.MGR.HHZ. 2013-04-20T06:16:09.41 0.1 negative manual P 286 7.6812 145 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ACER.HHN. ML:2.0 0.00014600000000000003 0.62 AML other m 2013-04-20T06:16:37.08
IV.ACER.HHE. ML:2.0 0.000157 0.4 AML other m 2013-04-20T06:16:41.29
IV.BULG.HHN. ML:2.8 0.0038099999999999996 0.24 AML other m 2013-04-20T06:16:15.92
IV.BULG.HNN. ML:2.8 0.003665 0.24 AML other m 2013-04-20T06:16:15.92
IV.BULG.HNE. ML:2.4 0.0014750000000000002 0.28 AML other m 2013-04-20T06:16:15.86
IV.BULG.HHE. ML:2.4 0.001495 0.28 AML other m 2013-04-20T06:16:15.86
IV.CAR1.HHE. ML:2.3 0.000189 1.12 AML other m 2013-04-20T06:16:44.45
IV.CAR1.HHN. ML:2.2 0.00013550000000000001 0.36 AML other m 2013-04-20T06:16:44.73
IV.CDRU.HHE. ML:2.3 0.0005035 0.44 AML other m 2013-04-20T06:16:24.26
IV.CDRU.HHN. ML:2.0 0.00029200000000000005 0.22 AML other m 2013-04-20T06:16:24.29
IV.CMPR.HHE. ML:2.7 0.0019 0.26 AML other m 2013-04-20T06:16:19.65
IV.CMPR.HHN. ML:2.5 0.001265 0.86 AML other m 2013-04-20T06:16:20.23
MN.CUC.HHN. ML:2.0 0.000728 0.22 AML other m 2013-04-20T06:16:15.30
MN.CUC.HNN. ML:1.9 0.000592 0.22 AML other m 2013-04-20T06:16:15.30
MN.CUC.HNE. ML:1.9 0.000575 0.3 AML other m 2013-04-20T06:16:16.95
MN.CUC.HHE. ML:2.0 0.0007205 0.3 AML other m 2013-04-20T06:16:16.95
IV.MCEL.HHN. ML:2.1 0.000615 1.2 AML other m 2013-04-20T06:16:18.84
IV.MCEL.HHE. ML:2.2 0.0008575 0.18 AML other m 2013-04-20T06:16:19.10
IV.MGR.HHN. ML:2.7 0.006825 0.2 AML other m 2013-04-20T06:16:11.33
IV.MGR.HNE. ML:2.4 0.003605 0.28 AML other m 2013-04-20T06:16:11.42
IV.MGR.HHE. ML:2.6 0.005555 0.2 AML other m 2013-04-20T06:16:11.42
IV.MGR.HNN. ML:2.8 0.00774 0.18 AML other m 2013-04-20T06:16:11.42
IV.MTSN.HHE. ML:2.2 0.00127 0.36 AML other m 2013-04-20T06:16:15.16
IV.MTSN.HHN. ML:2.4 0.00188 0.84 AML other m 2013-04-20T06:16:17.53
IV.SALB.HHN. ML:1.8 0.00011495 0.3 AML other m 2013-04-20T06:16:32.03
IV.SALB.HHE. ML:1.8 0.000124 0.46 AML other m 2013-04-20T06:16:32.12
IV.SCHR.EHN. ML:2.1 0.0004925 0.18 AML other m 2013-04-20T06:16:19.38
IV.SCHR.EHE. ML:2.2 0.0006435 0.28 AML other m 2013-04-20T06:16:20.16
IV.SIRI.HNN. ML:2.4 0.0016950000000000001 0.64 AML other m 2013-04-20T06:16:15.91
IV.SIRI.HHE. ML:2.6 0.00254 1.28 AML other m 2013-04-20T06:16:17.27
IV.SIRI.HNE. ML:2.5 0.0024500000000000004 1.28 AML other m 2013-04-20T06:16:17.27
IV.SIRI.HHN. ML:2.4 0.0017749999999999999 0.62 AML other m 2013-04-20T06:16:15.90
IV.SLCN.HHN. ML:2.6 0.001925 1.24 AML other m 2013-04-20T06:16:21.13
IV.SLCN.HNN. ML:2.6 0.001935 1.24 AML other m 2013-04-20T06:16:21.76
IV.SLCN.HHE. ML:2.7 0.002615 0.3 AML other m 2013-04-20T06:16:23.05
IV.SLCN.HNE. ML:2.7 0.002525 0.3 AML other m 2013-04-20T06:16:23.06
IV.T0721.HNE. ML:2.2 0.000638 1.44 AML other m 2013-04-20T06:16:23.23
IV.T0721.HNN. ML:2.2 0.0005725 1.6 AML other m 2013-04-20T06:16:22.43
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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