Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 20-09-2020 and time 23:41:40 (Italy) in region Mar Ionio Meridionale (MARE)

A magnitude ML 1.6 earthquake occured in region: Mar Ionio Meridionale (MARE), on

  • 20-09-2020 21:41:40 (UTC)
  • 20-09-2020 23:41:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6030, 15.6480 at 29 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km E of Acireale (52622 inhabitants)
51 Km E of Catania (314555 inhabitants)
56 Km S of Reggio di Calabria (183035 inhabitants)
66 Km S of Messina (238439 inhabitants)
68 Km NE 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 1.6 2020-09-20
21:41:40		 37.6033 15.6477 29 2021-02-26
14:55:57		 Bollettino Sismico Italiano INGV 83358551
Reviewed
Rev100 		ML 1.7 2020-09-20
21:41:40		 37.6148 15.6133 33 2020-09-20
21:50:33		 Sala Sismica INGV-Roma 83080431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-20 21:41:40 ± 0.1
Latitude 37.6033 ± 0.0045
Longitude 15.6477 ± 0.0079
Depth (km) 29 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83358551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 697
Semi-minor axis of confidence ellipse (meter) 289
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 106
Circular confidence region, given by single value of horizontal uncertainty (meter) 700.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 173
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.36962
Epicentral distance of station farthest from the epicenter (degree) 1.04951
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 83358551
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-10 17:06:25

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 83080431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-20 21:50:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MILZ.HHZ. 2020-09-20T21:42:05.91 0.6 undecidable manual S 334 82.5507 104 0.21 46
IV.SSY.HHZ. 2020-09-20T21:42:03.08 0.6 undecidable manual S 226 70.7736 107 0.42 44
IV.MSRU.HHZ. 2020-09-20T21:42:03.53 0.6 undecidable manual S 351 74.2701 106 -0.03 48
IV.HLNI.HHZ. 2020-09-20T21:42:02.75 0.6 undecidable manual S 248 73.8705 106 -0.72 41
IV.PLAC.HHE. 2020-09-20T21:42:00.33 0.3 undecidable manual P 36 116.4945 54 0.22 64
IV.HPAC.HHE. 2020-09-20T21:41:59.31 0.3 undecidable manual P 209 112.998 54 -0.35 63
IV.AGST.EHE. 2020-09-20T21:41:58.32 0.3 undecidable manual S 224 53.4021 113 0.02 75
IV.IVPL.HHZ. 2020-09-20T21:41:58.15 0.3 undecidable manual P 326 103.7184 101 -0.12 67
IV.AIO.HHZ. 2020-09-20T21:41:58.47 0.3 undecidable manual S 318 54.7008 112 -0.14 73
IV.HAGA.HHZ. 2020-09-20T21:41:58.84 0.6 undecidable manual S 231 55.8996 112 -0.08 49
IV.MTTG.HHZ. 2020-09-20T21:41:56.31 0.3 undecidable manual S 6 44.622 118 0.15 75
IV.MILZ.HHZ. 2020-09-20T21:41:55.04 0.3 undecidable manual P 334 82.5507 104 -0.05 70
IV.EPZF.HHZ. 2020-09-20T21:41:54.49 0.3 undecidable manual P 290 73.5708 106 0.74 59
IV.EPOZ.HHZ. 2020-09-20T21:41:54.85 0.6 undecidable manual S 281 41.0256 120 -0.49 47
IV.MSRU.HHZ. 2020-09-20T21:41:53.67 0.3 undecidable manual P 351 74.2701 106 -0.19 69
MN.CEL.HHZ. 2020-09-20T21:41:53.81 0.1 undecidable manual P 16 75.9684 106 -0.3 90
IV.SSY.HHZ. 2020-09-20T21:41:53.17 0.6 undecidable manual P 226 70.7736 107 -0.16 47
IV.HLNI.HHZ. 2020-09-20T21:41:53.54 0.1 undecidable manual P 248 73.8705 106 -0.26 92
IV.NOV.HHZ. 2020-09-20T21:41:52.54 0.3 undecidable manual P 317 64.9905 109 0.05 73
IV.SOI.EHE. 2020-09-20T21:41:52.39 0.3 undecidable manual P 34 63.0924 109 0.17 72
IV.GMB.BHZ. 2020-09-20T21:41:52.26 0.3 undecidable manual P 14 64.5909 109 -0.18 71
IV.MPNC.HHN. 2020-09-20T21:41:52.51 0.6 undecidable manual P 337 65.5899 108 -0.07 48
IV.HAGA.HHZ. 2020-09-20T21:41:51.15 0.3 undecidable manual P 231 55.8996 112 -0.03 75
IV.AGST.EHE. 2020-09-20T21:41:51.00 0.3 undecidable manual P 224 53.4021 113 0.18 72
IV.EFIU.HHE. 2020-09-20T21:41:50.05 0.6 undecidable manual P 298 43.623 118 0.59 44
IV.AIO.HHZ. 2020-09-20T21:41:50.88 0.1 undecidable manual P 318 54.7008 112 -0.12 98
IV.MTTG.HHZ. 2020-09-20T21:41:49.71 0.1 positive manual P 6 44.622 118 0.12 100
IV.EPOZ.HHZ. 2020-09-20T21:41:49.83 0.6 undecidable manual P 281 41.0256 120 0.72 42
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTTG.HHE. ML:1.4 0.000060147145 0.4608 AML other m 2020-09-20T21:41:57.86
IV.AIO.HHN. ML:1.4 0.00004879199 0.32 AML other m 2020-09-20T21:41:58.93
IV.AIO.HHE. ML:1.5 0.00006297601 0.4736 AML other m 2020-09-20T21:41:59.53
IV.MTTG.HHN. ML:1.4 0.00005822544 0.5632 AML other m 2020-09-20T21:41:59.54
IV.GMB.BHN. ML:1.8 0.00009555616999999999 0.2048 AML other m 2020-09-20T21:42:01.38
IV.GMB.BHE. ML:1.9 0.00013462905 0.3968 AML other m 2020-09-20T21:42:02.98
IV.HLNI.HHE. ML:1.6 0.00005666707 0.1024 AML other m 2020-09-20T21:42:03.46
MN.CEL.HHE. ML:1.2 0.000020177340000000004 0.704 AML other m 2020-09-20T21:42:03.35
IV.HLNI.HHN. ML:1.6 0.000050489685 0.0896 AML other m 2020-09-20T21:42:03.69
IV.MSRU.HHE. ML:1.8 0.00009302031499999999 0.5888 AML other m 2020-09-20T21:42:04.26
IV.MSRU.HHN. ML:1.5 0.000040232770000000003 0.3968 AML other m 2020-09-20T21:42:03.91
MN.CEL.HHN. ML:1.0 0.000014703689999999999 0.4992 AML other m 2020-09-20T21:42:06.21
IV.MILZ.HHE. ML:2.3 0.000266825 0.4224 AML other m 2020-09-20T21:42:08.41
IV.MILZ.HHN. ML:1.6 0.00004899162 0.2816 AML other m 2020-09-20T21:42:09.67
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