Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 17-08-2013 and time 01:44:39 (Italy) in region 7 km SE Randazzo (CT)

A magnitude ML 2.0 earthquake occured in region: 7 km SE Randazzo (CT), on

  • 16-08-2013 23:44:39 (UTC)
  • 17-08-2013 01:44:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8230, 14.9800 at 29 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
Randazzo CT 7 10900 10900
Maletto CT 10 3920 14820
Santa Domenica Vittoria ME 11 980 15800
Moio Alcantara ME 11 717 16517
Malvagna ME 13 733 17250
Roccella Valdemone ME 13 666 17916
Bronte CT 13 19172 37088
Castiglione di Sicilia CT 14 3215 40303
Linguaglossa CT 15 5403 45706
Maniace CT 16 3765 49471
Milo CT 16 1087 50558
Francavilla di Sicilia ME 16 3945 54503
Sant'Alfio CT 17 1582 56085
Piedimonte Etneo CT 18 3963 60048
Zafferana Etnea CT 18 9517 69565
Motta Camastra ME 19 845 70410
Floresta ME 19 485 70895

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NW of Acireale (52622 inhabitants)
37 Km N of Catania (314555 inhabitants)
65 Km SW of Messina (238439 inhabitants)
66 Km SW of Reggio di Calabria (183035 inhabitants)
89 Km E of Caltanissetta (63360 inhabitants)
89 Km N of Siracusa (122291 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 2.0 2013-08-16
23:44:39		 37.8228 14.9798 29 2015-01-20
11:28:29		 Bollettino Sismico Italiano INGV 4817621
Reviewed
Rev100 		ML 1.9 2013-08-16
23:44:39		 37.8032 14.9803 9 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 4279301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2013-08-16 23:44:39 ± 0.22
Latitude 37.8228 ± 0.0063
Longitude 14.9798 ± 0.0125
Depth (km) 29 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 4817621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1066
Semi-minor axis of confidence ellipse (meter) 451
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 99
Circular confidence region, given by single value of horizontal uncertainty (meter) 1070.0
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 30
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0.21943
Epicentral distance of station farthest from the epicenter (degree) 0.87774
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 4817621
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2015-01-15 13:05:31

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 13
Type of magnitude ML
Reference to an origin 4279301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2013-08-16 23:53:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HMDC.HHZ. 2013-08-16T23:45:08.50 0.1 undecidable manual S 190 97.4247 102 0.13 87
IV.HAVL.HHZ. 2013-08-16T23:45:07.80 0.6 undecidable manual S 173 96.6255 102 -0.37 40
IV.MEU.SHZ. 2013-08-16T23:45:03.50 0.3 undecidable manual S 190 80.0643 105 -0.37 62
IV.SSY.HHZ. 2013-08-16T23:45:02.40 0.6 undecidable manual S 174 74.2701 106 0.02 46
IV.MSRU.HHZ. 2013-08-16T23:45:01.40 0.3 undecidable manual S 43 67.2771 108 0.81 55
IV.IVPL.HHZ. 2013-08-16T23:45:00.47 0.6 undecidable manual S 0 61.3941 110 1.36 28
IV.HMDC.HHZ. 2013-08-16T23:44:56.03 0.1 undecidable manual P 190 97.4247 102 -0.1 86
IV.MPNC.HHE. 2013-08-16T23:44:56.20 0.1 undecidable manual S 42 48.5181 115 0.27 91
IV.HAVL.HHZ. 2013-08-16T23:44:55.53 0.3 undecidable manual P 173 96.6255 102 -0.48 59
IV.MSFR.HHZ. 2013-08-16T23:44:54.20 0.3 undecidable manual S 305 41.2254 120 -0.01 74
IV.MCPD.HHZ. 2013-08-16T23:44:53.50 0.1 undecidable manual S 327 39.5271 121 -0.31 93
IV.SSY.HHZ. 2013-08-16T23:44:52.42 0.3 undecidable manual P 174 74.2701 106 -0.25 65
IV.MEU.SHZ. 2013-08-16T23:44:52.94 0.3 undecidable manual P 190 80.0643 105 -0.6 59
IV.MSRU.HHZ. 2013-08-16T23:44:51.82 0.3 undecidable manual P 43 67.2771 108 0.18 67
IV.ESML.HHE. 2013-08-16T23:44:51.42 0.6 undecidable manual S 201 24.3534 136 0.79 42
IV.NOV.HHZ. 2013-08-16T23:44:50.10 0.1 undecidable manual S 31 26.5512 133 -0.95 76
IV.CAGR.HHE. 2013-08-16T23:44:50.35 0.3 undecidable manual P 242 47.619 116 1.52 41
IV.IVPL.HHZ. 2013-08-16T23:44:50.96 0.1 undecidable manual P 0 61.3941 110 0.17 91
IV.MUCR.HHZ. 2013-08-16T23:44:50.60 0.1 undecidable manual S 339 26.1516 134 -0.36 94
IV.ATN.BHE. 2013-08-16T23:44:50.18 0.6 undecidable manual P 48 56.499 112 0.1 47
IV.MPNC.HHE. 2013-08-16T23:44:48.89 0.1 undecidable manual P 42 48.5181 115 -0.06 96
IV.GALF.HHZ. 2013-08-16T23:44:48.12 0.3 undecidable manual P 251 38.3283 122 0.54 66
IV.ECNV.HHE. 2013-08-16T23:44:48.44 0.3 undecidable manual P 223 34.4433 125 1.36 46
IV.MCPD.HHZ. 2013-08-16T23:44:47.46 0.1 undecidable manual P 327 39.5271 121 -0.26 94
IV.MSFR.HHZ. 2013-08-16T23:44:47.98 0.6 undecidable manual P 305 41.2254 120 0.01 49
IV.EPOZ.HHZ. 2013-08-16T23:44:46.04 0.1 undecidable manual P 132 24.8529 135 0.1 100
IV.ESML.HHE. 2013-08-16T23:44:46.13 0.3 undecidable manual P 201 24.3534 136 0.24 73
IV.MNO.SHZ. 2013-08-16T23:44:46.22 0.1 undecidable manual P 296 27.6501 132 -0.04 100
IV.NOV.HHZ. 2013-08-16T23:44:45.77 0.1 undecidable manual P 31 26.5512 133 -0.36 94
IV.MUCR.HHZ. 2013-08-16T23:44:45.60 0.1 undecidable manual P 339 26.1516 134 -0.48 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPOZ.HHN. ML:2.3 0.0006885 0.86 AML other m 2013-08-16T23:44:54.83
IV.EPOZ.HHE. ML:2.2 0.0006615 1.16 AML other m 2013-08-16T23:44:58.94
IV.GALF.HHN. ML:1.7 0.0001485 0.54 AML other m 2013-08-16T23:44:56.30
IV.GALF.HHE. ML:1.7 0.0001495 0.82 AML other m 2013-08-16T23:44:56.05
IV.HAVL.HHN. ML:2.2 0.000148 1.54 AML other m 2013-08-16T23:45:09.68
IV.HAVL.HHE. ML:2.0 0.00010365 1.34 AML other m 2013-08-16T23:45:15.09
IV.MNO.SHE. ML:2.0 0.000315 0.6 AML other m 2013-08-16T23:44:51.50
IV.MNO.SHN. ML:1.9 0.00028799999999999995 1.36 AML other m 2013-08-16T23:44:59.18
IV.MSFR.HHE. ML:1.7 0.000123 1.58 AML other m 2013-08-16T23:45:11.51
IV.MSRU.HHE. ML:2.1 0.00018449999999999999 0.3 AML other m 2013-08-16T23:45:03.50
IV.MSRU.HHN. ML:1.9 0.00013450000000000002 0.3 AML other m 2013-08-16T23:45:02.80
IV.MUCR.HHN. ML:1.8 0.00023 0.32 AML other m 2013-08-16T23:44:52.38
IV.MUCR.HHE. ML:1.7 0.00018099999999999998 1.08 AML other m 2013-08-16T23:44:51.13
IV.NOV.HHE. ML:2.2 0.0005875 0.42 AML other m 2013-08-16T23:44:50.56
IV.NOV.HHN. ML:2.0 0.00034950000000000004 0.68 AML other m 2013-08-16T23:44:50.91
IV.RAFF.HHN. ML:2.2 0.0002065 0.2 AML other m 2013-08-16T23:45:08.27
IV.SSY.HHE. ML:2.0 0.0001555 0.58 AML other m 2013-08-16T23:45:04.89
IV.SSY.HHN. ML:2.3 0.000302 1.16 AML other m 2013-08-16T23:45:07.82
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
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