Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 04-09-2019 and time 05:42:40 (Italy) in region 2 km S Ragalna (CT)

A magnitude ML 1.7 earthquake occured in region: 2 km S Ragalna (CT), on

  • 04-09-2019 03:42:40 (UTC)
  • 04-09-2019 05:42:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6100, 14.9410 at 8 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
Ragalna CT 2 3924 3924
Belpasso CT 4 28108 32032
Santa Maria di Licodia CT 5 7641 39673
Paternò CT 5 48228 87901
Biancavilla CT 7 24007 111908
Camporotondo Etneo CT 7 5023 116931
Nicolosi CT 8 7463 124394
San Pietro Clarenza CT 8 7743 132137
Pedara CT 11 14102 146239
Mascalucia CT 11 31958 178197
Motta Sant'Anastasia CT 11 12116 190313
Adrano CT 11 36122 226435
Misterbianco CT 11 49410 275845
Gravina di Catania CT 12 25838 301683
Tremestieri Etneo CT 12 20589 322272
Trecastagni CT 12 10910 333182
Sant'Agata li Battiati CT 14 9479 342661
Viagrande CT 14 8563 351224
San Giovanni la Punta CT 14 23060 374284
Aci Bonaccorsi CT 15 3524 377808
San Gregorio di Catania CT 16 11966 389774
Aci Sant'Antonio CT 16 17984 407758
Valverde CT 17 7840 415598
Zafferana Etnea CT 17 9517 425115
Catania CT 18 314555 739670
Centuripe EN 18 5470 745140
Aci Catena CT 18 29851 774991
Aci Castello CT 19 18723 793714
Santa Venerina CT 20 8592 802306
Acireale CT 20 52622 854928

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km NW of Catania (314555 inhabitants)
20 Km W of Acireale (52622 inhabitants)
69 Km NW of Siracusa (122291 inhabitants)
78 Km N of Ragusa (73313 inhabitants)
79 Km E of Caltanissetta (63360 inhabitants)
82 Km NE of Vittoria (63339 inhabitants)
83 Km SW of Reggio di Calabria (183035 inhabitants)
85 Km SW of Messina (238439 inhabitants)
85 Km N of Modica (54633 inhabitants)
86 Km NE of Gela (75827 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 2019-09-04
03:42:40		 37.6097 14.9413 8 2020-02-28
16:42:07		 Bollettino Sismico Italiano INGV 73919251
Reviewed
Rev100 		ML 1.8 2019-09-04
03:42:39		 37.6233 14.9178 10 2019-09-04
03:54:57		 Sala Sismica INGV-Roma 72097561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-04 03:42:40 ± 0.1
Latitude 37.6097 ± 0.0054
Longitude 14.9413 ± 0.0102
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 73919251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 812
Semi-minor axis of confidence ellipse (meter) 638
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 304
Circular confidence region, given by single value of horizontal uncertainty (meter) 810.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.04946
Epicentral distance of station farthest from the epicenter (degree) 0.46405
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 72097561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-04 03:54:57

ML:1.7

Field Value
Value 1.7
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 73919251
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-11-19 10:11:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.AGST.EHZ. 2019-09-04T03:42:56.21 0.6 undecidable manual S 147 46.5201 50 0.57 42
IV.HAGA.HHE. 2019-09-04T03:42:54.32 0.6 undecidable manual S 152 40.626 50 0.26 46
IV.HLNI.HHZ. 2019-09-04T03:42:51.20 0.6 undecidable manual S 192 29.5482 106 0.4 46
IV.SSY.HHZ. 2019-09-04T03:42:49.89 0.3 undecidable manual P 167 51.5151 50 0.05 71
IV.AGST.EHZ. 2019-09-04T03:42:48.56 0.3 undecidable manual P 147 46.5201 50 -0.53 65
IV.EPIT.HHZ. 2019-09-04T03:42:48.74 0.6 undecidable manual S 24 24.5532 109 -0.39 46
IV.GALF.HHZ. 2019-09-04T03:42:47.62 1.0 undecidable manual P 289 34.743 50 0.35 23
IV.HAGA.HHE. 2019-09-04T03:42:47.74 0.6 undecidable manual P 152 40.626 50 -0.43 45
IV.EPZF.HHE. 2019-09-04T03:42:45.64 0.6 undecidable manual P 343 24.9528 108 0.25 48
IV.EPIT.HHZ. 2019-09-04T03:42:45.78 0.6 undecidable manual P 24 24.5532 109 0.46 46
IV.HLNI.HHZ. 2019-09-04T03:42:45.94 0.6 undecidable manual P 192 29.5482 106 -0.35 46
IV.EMSG.HHZ. 2019-09-04T03:42:45.78 0.6 undecidable manual P 2 23.4543 109 0.67 43
IV.ECHR.HHE. 2019-09-04T03:42:44.36 0.3 undecidable manual S 344 8.88 133 0.02 77
IV.ESLN.HHZ. 2019-09-04T03:42:44.84 0.3 undecidable manual S 17 9.7791 130 0.27 73
IV.EMCN.HNZ. 2019-09-04T03:42:44.99 1.0 undecidable manual P 22 21.7671 111 0.2 24
IV.ENIC.HHZ. 2019-09-04T03:42:44.40 0.6 undecidable manual S 71 7.4814 138 0.4 48
IV.ESML.HHZ. 2019-09-04T03:42:43.78 0.3 undecidable manual S 280 5.4945 146 0.19 75
IV.ENIC.HHZ. 2019-09-04T03:42:42.12 0.1 undecidable manual P 71 7.4814 138 -0.25 99
IV.ECHR.HHE. 2019-09-04T03:42:42.28 0.1 undecidable manual P 344 8.88 133 -0.28 98
IV.ESLN.HHZ. 2019-09-04T03:42:42.40 0.1 negative manual P 17 9.7791 130 -0.29 97
IV.ESML.HHZ. 2019-09-04T03:42:41.93 0.1 positive manual P 280 5.4945 146 -0.2 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESLN.HHE. ML:2.1 0.0018227955 0.4384 AML other m 2019-09-04T03:42:44.99
IV.ENIC.HHE. ML:1.8 0.0011513136500000002 0.12 AML other m 2019-09-04T03:42:45.60
IV.ENIC.HHN. ML:1.8 0.0010364728000000001 0.12 AML other m 2019-09-04T03:42:45.60
IV.HLNI.HHN. ML:1.0 0.0000453099 0.2592 AML other m 2019-09-04T03:42:52.40
IV.AGST.EHN. ML:1.6 0.00011300260000000001 0.3392 AML other m 2019-09-04T03:42:56.13
IV.AGST.EHE. ML:1.6 0.00012150157 0.16 AML other m 2019-09-04T03:42:56.48
IV.ESML.HHE. ML:0.0 0.0018361325 0.36 AML other m 2019-09-04T03:42:44.63
IV.ESLN.HHN. ML:2.2 0.002463671 0.3584 AML other m 2019-09-04T03:42:45.03
IV.HLNI.HHE. ML:1.0 0.00004548434 0.2608 AML other m 2019-09-04T03:42:52.99
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