Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 28-03-2013 and time 21:21:58 (Italy) in region 6 km S Randazzo (CT)

A magnitude ML 1.7 earthquake occured in region: 6 km S Randazzo (CT), on

  • 28-03-2013 20:21:58 (UTC)
  • 28-03-2013 21:21:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.8270, 14.9530 at 31 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 6 10900 10900
Maletto CT 8 3920 14820
Santa Domenica Vittoria ME 10 980 15800
Bronte CT 11 19172 34972
Moio Alcantara ME 12 717 35689
Roccella Valdemone ME 13 666 36355
Maniace CT 13 3765 40120
Malvagna ME 14 733 40853
Castiglione di Sicilia CT 16 3215 44068
Linguaglossa CT 17 5403 49471
Francavilla di Sicilia ME 18 3945 53416
Milo CT 18 1087 54503
Floresta ME 18 485 54988
Sant'Alfio CT 19 1582 56570
Zafferana Etnea CT 20 9517 66087
Piedimonte Etneo CT 20 3963 70050

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NW of Acireale (52622 inhabitants)
38 Km NW of Catania (314555 inhabitants)
67 Km SW of Messina (238439 inhabitants)
68 Km W of Reggio di Calabria (183035 inhabitants)
87 Km E of Caltanissetta (63360 inhabitants)
90 Km NW 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 1.7 2013-03-28
20:21:58		 37.827 14.9533 31 2015-01-20
11:24:29		 Bollettino Sismico Italiano INGV 4553321
Reviewed
Rev100 		ML 1.7 2013-03-28
20:21:58		 37.841 14.9573 36 2014-10-21
12:08:56		 Sala Sismica INGV-Roma 3119551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2013-03-28 20:21:58 ± 0.14
Latitude 37.8270 ± 0.0036
Longitude 14.9533 ± 0.0057
Depth (km) 31 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 4553321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 450
Semi-minor axis of confidence ellipse (meter) 245
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 263
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.22483
Epicentral distance of station farthest from the epicenter (degree) 0.67539
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 3119551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2013-03-28 20:27:11

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 4553321
Agency INGV
Autore Manually reviewed by Franco Mele
Time of creation (UTC) 2015-01-15 13:25:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSY.HHZ. 2013-03-28T20:22:22.20 0.3 undecidable manual S 172 74.9694 107 0.1 68
IV.HCRL.HHZ. 2013-03-28T20:22:18.43 0.3 undecidable manual S 173 60.6948 112 -0.08 70
IV.HLNI.HHZ. 2013-03-28T20:22:16.78 0.3 undecidable manual S 188 53.6019 115 0.03 72
IV.MCPD.HHZ. 2013-03-28T20:22:13.16 0.3 undecidable manual S 329 37.8288 124 0.06 74
IV.MSFR.HHZ. 2013-03-28T20:22:13.15 0.3 undecidable manual S 306 39.1275 123 -0.22 71
IV.SSY.HHZ. 2013-03-28T20:22:12.27 0.1 undecidable manual P 172 74.9694 107 0.01 92
IV.MCSR.HHZ. 2013-03-28T20:22:12.87 0.3 undecidable manual S 42 35.8419 126 0.22 71
IV.GALF.HHZ. 2013-03-28T20:22:12.94 0.3 undecidable manual S 249 36.3414 126 0.19 73
IV.AIO.HHZ. 2013-03-28T20:22:11.39 0.3 undecidable manual S 57 29.2485 132 0.1 73
IV.MUCR.HHZ. 2013-03-28T20:22:10.28 0.3 undecidable manual S 344 24.9528 137 -0.19 74
IV.NOV.HHZ. 2013-03-28T20:22:10.63 0.3 undecidable manual S 36 27.4503 134 -0.31 72
IV.HCRL.HHZ. 2013-03-28T20:22:09.99 0.1 undecidable manual P 173 60.6948 112 -0.19 91
IV.HLNI.HHZ. 2013-03-28T20:22:08.94 0.1 undecidable manual P 188 53.6019 115 -0.23 91
IV.GALF.HHZ. 2013-03-28T20:22:07.31 0.1 undecidable manual P 249 36.3414 126 0.45 91
IV.MSFR.HHZ. 2013-03-28T20:22:07.28 0.1 undecidable manual P 306 39.1275 123 0.06 98
IV.AIO.HHZ. 2013-03-28T20:22:06.17 0.1 undecidable manual P 57 29.2485 132 0.16 97
IV.MCSR.HHZ. 2013-03-28T20:22:06.94 0.1 undecidable manual P 42 35.8419 126 0.14 97
IV.MCPD.HHZ. 2013-03-28T20:22:06.94 0.1 undecidable manual P 329 37.8288 124 -0.12 96
IV.NOV.HHZ. 2013-03-28T20:22:05.74 0.1 undecidable manual P 36 27.4503 134 -0.07 100
IV.MUCR.HHZ. 2013-03-28T20:22:05.41 0.1 negative manual P 344 24.9528 137 -0.14 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.AIO.HHN. ML:1.5 0.00009964999999999998 0.28 AML other m 2013-03-28T20:22:12.57
IV.AIO.HHE. ML:1.6 0.000124 0.7 AML other m 2013-03-28T20:22:12.19
IV.GALF.HHE. ML:1.7 0.000151 0.5 AML other m 2013-03-28T20:22:15.21
IV.GALF.HHN. ML:1.6 0.000112 0.98 AML other m 2013-03-28T20:22:15.31
IV.HCRL.HHE. ML:1.7 0.00008879999999999999 0.36 AML other m 2013-03-28T20:22:18.98
IV.HCRL.HHN. ML:1.7 0.00008195 1.06 AML other m 2013-03-28T20:22:19.00
IV.HLNI.HHE. ML:1.7 0.00010800000000000001 0.22 AML other m 2013-03-28T20:22:16.94
IV.HLNI.HHN. ML:1.7 0.00010135 0.26 AML other m 2013-03-28T20:22:16.96
IV.MCPD.HHE. ML:1.5 0.0000849 1.42 AML other m 2013-03-28T20:22:13.48
IV.MCPD.HHN. ML:1.4 0.0000635 0.82 AML other m 2013-03-28T20:22:13.98
IV.MCSR.HHE. ML:2.0 0.00027 0.28 AML other m 2013-03-28T20:22:13.89
IV.MCSR.HHN. ML:2.0 0.000268 0.34 AML other m 2013-03-28T20:22:14.40
IV.MSFR.HHN. ML:1.3 0.00005234999999999999 1.46 AML other m 2013-03-28T20:22:15.17
IV.MSFR.HHE. ML:1.2 0.000047149999999999994 1.2 AML other m 2013-03-28T20:22:13.62
IV.MUCR.HHN. ML:1.8 0.00021500000000000002 0.46 AML other m 2013-03-28T20:22:10.79
IV.MUCR.HHE. ML:1.8 0.000256 0.52 AML other m 2013-03-28T20:22:10.69
IV.NOV.HHN. ML:1.5 0.00011115 0.24 AML other m 2013-03-28T20:22:11.15
IV.NOV.HHE. ML:1.6 0.000154 0.34 AML other m 2013-03-28T20:22:12.29
IV.SSY.HHE. ML:1.8 0.0000925 1.42 AML other m 2013-03-28T20:22:24.36
IV.SSY.HHN. ML:2.2 0.00023050000000000002 0.32 AML other m 2013-03-28T20:22:27.49
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