Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 27-09-2017 and time 22:44:30 (Italy) in region 9 km N Rosolini (SR)

A magnitude ML 1.2 earthquake occured in region: 9 km N Rosolini (SR), on

  • 27-09-2017 20:44:30 (UTC)
  • 27-09-2017 22:44:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 36.9030, 14.9360 at 26 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
Rosolini SR 9 21427 21427
Noto SR 12 23913 45340
Ispica RG 13 16061 61401
Modica RG 16 54633 116034
Avola SR 18 31708 147742
Palazzolo Acreide SR 18 8808 156550
Ragusa RG 18 73313 229863
Canicattini Bagni SR 19 7109 236972

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km E of Modica (54633 inhabitants)
18 Km E of Ragusa (73313 inhabitants)
36 Km E of Vittoria (63339 inhabitants)
36 Km SW of Siracusa (122291 inhabitants)
64 Km E of Gela (75827 inhabitants)
68 Km S of Catania (314555 inhabitants)
82 Km S of Acireale (52622 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 1.2 2017-09-27
20:44:30		 36.9033 14.9358 26 2018-09-04
09:05:56		 Bollettino Sismico Italiano INGV 51538511
Reviewed
Rev100 		Md 1.7 2017-09-27
20:44:28		 36.9953 15.2123 10 2017-09-27
20:56:00		 Sala Sismica INGV-Roma 50501921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-09-27 20:44:30 ± 0.23
Latitude 36.9033 ± 0.0063
Longitude 14.9358 ± 0.0124
Depth (km) 26 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 51538511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 941
Semi-minor axis of confidence ellipse (meter) 675
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 78
Circular confidence region, given by single value of horizontal uncertainty (meter) 940.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 138
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.13400
Epicentral distance of station farthest from the epicenter (degree) 0.55758
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 51538511
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-06-08 16:14:12

Md:1.7

Field Value
Value 1.7
Uncertainty 0.9
Num. used stations 4
Type of magnitude Md
Reference to an origin 50501921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-09-27 20:56:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HLNI.HHZ. 2017-09-27T20:44:47.00 0.6 undecidable manual S 353 49.7169 111 -0.06 48
IV.HAGA.HHZ. 2017-09-27T20:44:46.10 0.6 undecidable manual S 25 46.5201 113 -0.18 47
IV.SSY.HHZ. 2017-09-27T20:44:42.91 0.6 undecidable manual S 23 30.747 124 0.35 47
IV.RAFF.HHZ. 2017-09-27T20:44:42.41 0.3 undecidable manual P 305 61.8936 107 0.53 65
IV.HPAC.HHZ. 2017-09-27T20:44:41.19 0.3 undecidable manual S 157 23.4543 133 0.17 74
IV.MEU.SHZ. 2017-09-27T20:44:41.26 0.3 undecidable manual S 338 24.8529 131 -0.05 76
IV.HLNI.HHZ. 2017-09-27T20:44:40.01 0.3 undecidable manual P 353 49.7169 111 -0.09 72
IV.HMDC.HHZ. 2017-09-27T20:44:39.46 0.6 undecidable manual S 295 14.874 147 -0.08 51
IV.HAGA.HHZ. 2017-09-27T20:44:39.32 0.6 undecidable manual P 25 46.5201 113 -0.33 46
IV.SSY.HHZ. 2017-09-27T20:44:37.90 0.3 undecidable manual P 23 30.747 124 0.4 70
IV.HPAC.HHZ. 2017-09-27T20:44:36.43 0.1 undecidable manual P 157 23.4543 133 -0.18 99
IV.MEU.SHZ. 2017-09-27T20:44:36.67 0.1 undecidable manual P 338 24.8529 131 -0.11 100
IV.HMDC.HHZ. 2017-09-27T20:44:35.58 0.1 negative manual P 295 14.874 147 -0.18 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.AGST.EHE. ML:1.9 0.00020868765 1.0112 AML other m 2017-09-27T20:44:38.53
IV.HMDC.HHN. ML:1.0 0.00004832932 0.3968 AML other m 2017-09-27T20:44:39.53
IV.HMDC.HHE. ML:1.1 0.000059057814 0.2816 AML other m 2017-09-27T20:44:39.57
IV.HPAC.HHE. ML:1.1 0.000056601825 0.8192 AML other m 2017-09-27T20:44:41.41
IV.HPAC.HHN. ML:1.0 0.000043623355000000003 1.3824 AML other m 2017-09-27T20:44:41.16
IV.HLNI.HHN. ML:1.2 0.000037493510000000003 0.9856 AML other m 2017-09-27T20:44:47.09
IV.HLNI.HHE. ML:1.2 0.000039170065 1.4592 AML other m 2017-09-27T20:44:47.17
IV.MEU.SHN. ML:0.0 0.000053408240000000004 1.0496 AML other m 2017-09-27T20:44:53.39
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