Earthquake with magnitude of ML 2.0 on date 17-04-2019 and time 13:11:50 (Italy) in region 1 km N Sant'Alfio (CT)

A magnitude ML 2.0 earthquake occured in region: 1 km N Sant'Alfio (CT), on

  • 17-04-2019 11:11:50 (UTC)
  • 17-04-2019 13:11:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.76, 15.14 at 6 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sant'Alfio CT 1 1582 1582
Milo CT 4 1087 2669
Mascali CT 5 14282 16951
Giarre CT 5 27659 44610
Riposto CT 6 14838 59448
Piedimonte Etneo CT 7 3963 63411
Fiumefreddo di Sicilia CT 7 9623 73034
Zafferana Etnea CT 8 9517 82551
Santa Venerina CT 8 8592 91143
Linguaglossa CT 9 5403 96546
Calatabiano CT 11 5308 101854
Gaggi ME 13 3184 105038
Castiglione di Sicilia CT 14 3215 108253
Giardini-Naxos ME 15 9415 117668
Motta Camastra ME 16 845 118513
Francavilla di Sicilia ME 16 3945 122458
Taormina ME 16 10960 133418
Acireale CT 16 52622 186040
Castelmola ME 16 1088 187128
Trecastagni CT 17 10910 198038
Graniti ME 17 1492 199530
Aci Sant'Antonio CT 17 17984 217514
Viagrande CT 17 8563 226077
Pedara CT 17 14102 240179
Aci Catena CT 17 29851 270030
Moio Alcantara ME 18 717 270747
Aci Bonaccorsi CT 18 3524 274271
Nicolosi CT 19 7463 281734
Malvagna ME 20 733 282467
Valverde CT 20 7840 290307
Letojanni ME 20 2861 293168

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km N of Acireale (52622 inhabitants)
29 Km N of Catania (314555 inhabitants)
59 Km SW of Reggio di Calabria (183035 inhabitants)
61 Km SW of Messina (238439 inhabitants)
79 Km N of Siracusa (122291 inhabitants)
99 Km NE of Ragusa (73313 inhabitants)
100 Km E of Caltanissetta (63360 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours) *

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985 *

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2014

Earthquakes since 1000 AD until 2014 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire *

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 ML 2.0 2019-04-17
11:11:50
37.76 15.14 6 2019-08-22
08:24:58
Bollettino Sismico Italiano INGV 68124921
Rev 100 ML 2.0 2019-04-17
11:11:50
37.76 15.14 5 2019-04-17
11:33:37
Sala Sismica INGV-Roma 67674921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-04-17 11:11:50 ± 0.09
Latitude 37.76 ± 0.00
Longitude 15.14 ± 0.01
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 68124921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 620
Semi-minor axis of confidence ellipse (meter) 354
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 229
Circular confidence region, given by single value of horizontal uncertainty (meter) 620
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.08723
Epicentral distance of station farthest from the epicenter (degree) 0.51801
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:2

Field Value
Value 2
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 68124921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-04-30 15:05:58

ML:2

Field Value
Value 2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 67674921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-04-17 11:33:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ESLN.HHZ. 2019-04-17T11:15:38.50 0.6 undecidable manual S 0.1484 9.999 0
IV.ESLN.HHZ. 2019-04-17T11:12:32.50 0.6 undecidable manual P 0.1484 3.83 0
IV.MILZ.HHZ. 2019-04-17T11:12:00.64 3.0 undecidable manual P 0.518 -0.99 0
IV.EPZF.HHZ. 2019-04-17T11:12:00.20 0.3 undecidable manual S 286 0.2356 103 0.2 71
IV.GALF.HHZ. 2019-04-17T11:12:00.77 0.6 undecidable manual P 264 0.4587 50 0.15 45
IV.MPNC.HHN. 2019-04-17T11:11:59.97 0.3 undecidable manual P 23 0.4218 50 -0.02 71
IV.MNO.SHZ. 2019-04-17T11:11:59.54 0.3 undecidable manual P 296 0.3939 50 0.02 71
IV.MUCR.HHE. 2019-04-17T11:11:58.39 0.3 undecidable manual P 323 0.3552 98 -0.29 68
IV.NOV.HHE. 2019-04-17T11:11:56.64 0.6 undecidable manual P 359 0.2698 101 -0.17 47
IV.EPZF.HHZ. 2019-04-17T11:11:55.93 0.3 undecidable manual P 286 0.2356 103 -0.14 71
IV.ENIC.HHE. 2019-04-17T11:11:54.28 0.3 undecidable manual P 217 0.1592 108 -0.14 73
IV.EPOZ.HHZ. 2019-04-17T11:11:54.60 0.3 undecidable manual S 158 0.0926 120 -0.22 72
IV.ECHR.HHE. 2019-04-17T11:11:54.92 0.3 undecidable manual P 249 0.1961 105 -0.28 70
IV.EMCN.HNZ. 2019-04-17T11:11:54.70 0.3 undecidable manual S 291 0.0926 120 -0.12 74
IV.EMSG.HHZ. 2019-04-17T11:11:54.76 0.3 undecidable manual P 292 0.1655 108 0.21 71
IV.EPIT.HHN. 2019-04-17T11:11:54.70 0.3 undecidable manual S 308 0.0872 121 0.09 74
IV.EPOZ.HHZ. 2019-04-17T11:11:53.60 0.3 undecidable manual P 158 0.0926 120 0.53 67
IV.EPIT.HHN. 2019-04-17T11:11:53.06 0.1 undecidable manual P 308 0.0872 121 0.1 99
IV.EMCN.HNZ. 2019-04-17T11:11:53.11 0.1 positive manual P 291 0.0926 120 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMCN.HNN. ML:0 0.003403868 0.352 AML other m 2019-04-17T11:11:55.76
IV.EMCN.HNE. ML:0 0.003410836 0.1792 AML other m 2019-04-17T11:11:57.57
IV.EPOZ.HHE. ML:0 0.0019142085 0.3008 AML other m 2019-04-17T11:12:00.03
IV.EMSG.HHN. ML:0 0.001057358 0.4416 AML other m 2019-04-17T11:12:00.22
IV.EPOZ.HHN. ML:0 0.0027441535 0.3648 AML other m 2019-04-17T11:11:59.57
IV.EPZF.HHE. ML:0 0.000512441 0.3584 AML other m 2019-04-17T11:12:03.38
IV.EMSG.HHE. ML:0 0.0015054125 0.6848 AML other m 2019-04-17T11:12:07.52
IV.EPZF.HHN. ML:0 0.00066428225 0.4224 AML other m 2019-04-17T11:12:07.51
IV.MNO.SHE. ML:0 0.00011353018 0.8384 AML other m 2019-04-17T11:12:14.64
IV.MNO.SHN. ML:0 0.0001485759 1.0368 AML other m 2019-04-17T11:12:15.38
IV.GALF.HHN. ML:0 0.00022034605 0.6208 AML other m 2019-04-17T11:12:17.59
IV.MILZ.HHN. ML:0 9.329214E-5 0.4608 AML other m 2019-04-17T11:12:17.91
IV.MILZ.HHE. ML:0 0.00012051385 0.48 AML other m 2019-04-17T11:12:18.16
IV.GALF.HHE. ML:0 0.0001887494 0.6592 AML other m 2019-04-17T11:12:20.28
IV.GALF.HNE. ML:1.6 9.4636585E-5 0.64 AML other m 2019-04-17T11:12:20.44
IV.GALF.HNN. ML:1.6 9.9607745E-5 0.7232 AML other m 2019-04-17T11:12:20.51
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in full SEED format Download