Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 23-01-2017 and time 15:57:43 (Italy) in region 3 km S Acireale (CT)

A magnitude ML 2.1 earthquake occured in region: 3 km S Acireale (CT), on

  • 23-01-2017 14:57:43 (UTC)
  • 23-01-2017 15:57:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.5890, 15.1720 at 15 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
Acireale CT 3 52622 52622
Aci Catena CT 3 29851 82473
Valverde CT 4 7840 90313
Aci Castello CT 4 18723 109036
Aci Sant'Antonio CT 5 17984 127020
Aci Bonaccorsi CT 6 3524 130544
San Gregorio di Catania CT 6 11966 142510
San Giovanni la Punta CT 7 23060 165570
Viagrande CT 7 8563 174133
Sant'Agata li Battiati CT 9 9479 183612
Trecastagni CT 9 10910 194522
Tremestieri Etneo CT 9 20589 215111
Gravina di Catania CT 10 25838 240949
Pedara CT 10 14102 255051
Mascalucia CT 11 31958 287009
Santa Venerina CT 11 8592 295601
Catania CT 12 314555 610156
Nicolosi CT 13 7463 617619
San Pietro Clarenza CT 13 7743 625362
Zafferana Etnea CT 13 9517 634879
Camporotondo Etneo CT 15 5023 639902
Milo CT 16 1087 640989
Giarre CT 16 27659 668648
Riposto CT 16 14838 683486
Misterbianco CT 16 49410 732896
Belpasso CT 17 28108 761004
Sant'Alfio CT 18 1582 762586
Mascali CT 19 14282 776868
Motta Sant'Anastasia CT 20 12116 788984

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km S of Acireale (52622 inhabitants)
12 Km NE of Catania (314555 inhabitants)
60 Km N of Siracusa (122291 inhabitants)
71 Km SW of Reggio di Calabria (183035 inhabitants)
75 Km SW of Messina (238439 inhabitants)
83 Km NE of Ragusa (73313 inhabitants)
89 Km NE of Modica (54633 inhabitants)
91 Km NE of Vittoria (63339 inhabitants)
98 Km E of Caltanissetta (63360 inhabitants)
100 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 2.1 2017-01-23
14:57:43		 37.5893 15.172 15 2018-01-10
09:44:34		 Bollettino Sismico Italiano INGV 50526901
Reviewed
Rev100 		ML 2.0 2017-01-23
14:57:43		 37.5727 15.1685 7 2017-01-23
15:05:33		 Sala Sismica INGV-Roma 39651791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-01-23 14:57:43 ± 0.18
Latitude 37.5893 ± 0.0063
Longitude 15.1720 ± 0.0148
Depth (km) 15 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 50526901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1087
Semi-minor axis of confidence ellipse (meter) 752
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 282
Circular confidence region, given by single value of horizontal uncertainty (meter) 1090.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 174
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.08364
Epicentral distance of station farthest from the epicenter (degree) 0.74014
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 50526901
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-10-19 09:35:06

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 39651791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-01-23 15:05:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HMDC.HHZ. 2017-01-23T14:58:07.20 0.3 undecidable manual S 206 77.8665 93 0.57 59
IV.MEU.SHZ. 2017-01-23T14:58:02.39 0.3 undecidable manual S 210 60.9945 94 0.26 66
IV.HVZN.HHE. 2017-01-23T14:58:02.32 0.3 undecidable manual S 222 60.7947 94 0.25 66
IV.RAFF.HHZ. 2017-01-23T14:57:57.36 0.1 undecidable manual P 241 82.1511 93 -0.08 88
IV.HMDC.HHZ. 2017-01-23T14:57:56.57 0.3 undecidable manual P 206 77.8665 93 -0.22 65
IV.MSFR.HHZ. 2017-01-23T14:57:55.90 0.3 undecidable manual P 314 70.8735 94 0.19 66
IV.HAGA.HHZ. 2017-01-23T14:57:55.24 0.3 undecidable manual S 183 33.744 100 0.33 69
IV.CAGR.HHZ. 2017-01-23T14:57:55.15 0.3 undecidable manual P 274 59.1963 95 1.24 46
IV.HLNI.HHZ. 2017-01-23T14:57:55.55 0.6 undecidable manual S 225 37.5291 99 -0.35 46
IV.HVZN.HHE. 2017-01-23T14:57:54.13 0.3 undecidable manual P 222 60.7947 94 -0.03 70
IV.MNO.SHZ. 2017-01-23T14:57:54.04 0.3 undecidable manual P 312 56.499 95 0.55 63
IV.GALF.HHZ. 2017-01-23T14:57:53.67 0.3 undecidable manual P 284 54.9006 95 0.43 65
IV.ESML.HHZ. 2017-01-23T14:57:53.35 0.6 undecidable manual S 277 25.9518 105 0.49 45
IV.MEU.SHZ. 2017-01-23T14:57:53.77 0.1 undecidable manual P 210 60.9945 94 -0.42 85
IV.NOV.HHZ. 2017-01-23T14:57:52.24 0.3 undecidable manual P 356 48.7179 96 -0.07 70
IV.ESLN.HHZ. 2017-01-23T14:57:51.10 0.6 undecidable manual S 304 20.868 111 -0.47 45
IV.AIO.HHE. 2017-01-23T14:57:51.55 0.3 undecidable manual P 7 42.7239 97 0.17 71
IV.HLNI.HHZ. 2017-01-23T14:57:50.09 0.1 positive manual P 225 37.5291 99 -0.51 87
IV.EPZF.HHZ. 2017-01-23T14:57:50.78 0.6 undecidable manual P 313 37.9287 98 0.12 48
IV.EPOZ.HHZ. 2017-01-23T14:57:49.87 0.6 undecidable manual S 9 9.2796 140 0.84 41
IV.EMSG.HHN. 2017-01-23T14:57:49.44 0.3 undecidable manual P 323 32.2455 101 -0.35 68
IV.HAGA.HHZ. 2017-01-23T14:57:49.69 0.1 undecidable manual P 183 33.744 100 -0.33 91
IV.ESML.HHZ. 2017-01-23T14:57:48.40 0.1 positive manual P 277 25.9518 105 -0.44 91
IV.ESLN.HHZ. 2017-01-23T14:57:47.55 0.1 undecidable manual P 304 20.868 111 -0.55 88
IV.EPOZ.HHZ. 2017-01-23T14:57:46.57 0.1 negative manual P 9 9.2796 140 -0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPOZ.HHE. ML:2.7 0.0055899999999999995 0.82 AML other m 2017-01-23T14:57:50.43
IV.EPOZ.HHN. ML:2.6 0.00415 1.72 AML other m 2017-01-23T14:57:51.88
IV.ESML.HHN. ML:2.0 0.0005565 0.56 AML other m 2017-01-23T14:57:53.54
IV.HLNI.HHE. ML:2.1 0.0004665 1.1 AML other m 2017-01-23T14:57:56.10
IV.HLNI.HHN. ML:2.1 0.000437 1.32 AML other m 2017-01-23T14:57:58.06
IV.ESML.HHE. ML:2.1 0.000683 0.36 AML other m 2017-01-23T14:58:00.18
IV.NOV.HHE. ML:1.9 0.00020250000000000002 0.32 AML other m 2017-01-23T14:58:01.17
IV.NOV.HHN. ML:1.8 0.00016999999999999999 0.48 AML other m 2017-01-23T14:58:03.66
IV.HMDC.HHE. ML:2.4 0.00034399999999999996 0.66 AML other m 2017-01-23T14:58:08.77
IV.RAFF.HHN. ML:2.0 0.000131 1 AML other m 2017-01-23T14:58:09.84
IV.RAFF.HHE. ML:1.9 0.00009914999999999998 0.6 AML other m 2017-01-23T14:58:10.56
IV.HMDC.HHN. ML:2.4 0.000377 0.42 AML other m 2017-01-23T14:58:10.48
IV.GALF.HHN. ML:1.7 0.00010564999999999999 0.72 AML other m 2017-01-23T14:58:11.63
IV.GALF.HHE. ML:1.7 0.000125 0.74 AML other m 2017-01-23T14:58:12.98
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
Waveforms Seismic signals in miniseed + resp format Download