Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.6 on date 07-09-2021 and time 14:02:50 (UTC) in region 3 km S Floridia (SR)

A magnitude ML 2.6 earthquake occured in region: 3 km S Floridia (SR), on

  • 07-09-2021 14:02:50 (UTC)
  • 07-09-2021 16:02:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.0560, 15.1510 at 18 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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Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Floridia SR 3 22762 22762
Solarino SR 6 8091 30853
Canicattini Bagni SR 8 7109 37962
Priolo Gargallo SR 12 12091 50053
Siracusa SR 13 122291 172344
Melilli SR 14 13621 185965
Sortino SR 16 8690 194655
Avola SR 16 31708 226363
Cassaro SR 19 821 227184
Noto SR 20 23913 251097
Ferla SR 20 2523 253620

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km W of Siracusa (122291 inhabitants)
40 Km E of Ragusa (73313 inhabitants)
41 Km NE of Modica (54633 inhabitants)
50 Km S of Catania (314555 inhabitants)
56 Km E of Vittoria (63339 inhabitants)
62 Km S of Acireale (52622 inhabitants)
80 Km E of Gela (75827 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 2.6 2021-09-07
14:02:50		 37.0565 15.1513 18 2022-03-30
13:04:11		 Bollettino Sismico Italiano INGV 96507481
Reviewed
Rev100 		ML 2.7 2021-09-07
14:02:49		 37.0677 15.1482 22 2021-09-07
14:09:50		 Sala Sismica INGV-Roma 95160981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-07 14:02:50 ± 0.18
Latitude 37.0565 ± 0.0063
Longitude 15.1513 ± 0.0113
Depth (km) 18 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96507481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 906
Semi-minor axis of confidence ellipse (meter) 588
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 296
Circular confidence region, given by single value of horizontal uncertainty (meter) 910.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 39
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.32560
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:2.6

Field Value
Value 2.6
Uncertainty 0.2
Num. used stations 54
Type of magnitude ML
Reference to an origin 96507481
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-14 14:31:23

ML:2.7

Field Value
Value 2.7
Uncertainty 0.2
Num. used stations 29
Type of magnitude ML
Reference to an origin 95160981
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-07 14:09:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RAFF.HHZ. 2021-09-07T14:03:13.65 0.6 undecidable manual S 285 72.1722 96 1.61 24
IV.IVPL.HHZ. 2021-09-07T14:03:13.89 0.3 undecidable manual P 354 147.1416 93 -0.46 52
IV.MSRU.HHZ. 2021-09-07T14:03:12.24 0.3 undecidable manual P 13 137.5623 93 -0.64 50
IV.MUCR.HHZ. 2021-09-07T14:03:09.36 0.3 undecidable manual P 348 112.0989 94 0.4 57
IV.CLTA.HHZ. 2021-09-07T14:03:08.53 0.3 undecidable manual P 276 105.8163 94 0.54 56
IV.ACATE.HNE. 2021-09-07T14:03:08.55 0.6 undecidable manual S 267 57.6978 98 0.33 43
IV.HVIT.HHZ. 2021-09-07T14:03:07.65 0.6 undecidable manual S 263 56.1993 98 -0.17 44
IV.EPZF.HHZ. 2021-09-07T14:03:06.09 0.3 undecidable manual P 343 89.0442 95 0.68 55
IV.GALF.HHZ. 2021-09-07T14:03:05.86 0.3 undecidable manual P 325 89.0442 95 0.45 59
IV.EPIT.HHZ. 2021-09-07T14:03:05.11 0.3 undecidable manual P 354 84.1491 95 0.45 60
IV.CAGR.HHZ. 2021-09-07T14:03:05.29 0.1 undecidable manual P 318 85.0482 95 0.49 79
IV.HVZN.HHZ. 2021-09-07T14:03:04.19 0.6 undecidable manual S 289 40.8258 103 0.4 44
IV.HPAC.HHZ. 2021-09-07T14:03:04.05 0.6 undecidable manual Sg 100
IV.ESAL.HHZ. 2021-09-07T14:03:04.39 0.3 undecidable manual P 359 77.4669 96 0.75 55
IV.HLNI.HHZ. 2021-09-07T14:03:03.06 0.6 undecidable manual S 323 40.7259 103 -0.69 39
IV.HMDC.HHZ. 2021-09-07T14:03:02.00 0.6 undecidable manual S 252 34.3434 106 -0.11 47
IV.ISPIC.HNZ. 2021-09-07T14:03:02.94 0.3 undecidable manual S 216 37.7289 104 -0.03 71
IV.RAFF.HHZ. 2021-09-07T14:03:02.86 0.1 negative manual P 285 72.1722 96 0.04 89
IV.EPOZ.HHZ. 2021-09-07T14:03:02.37 0.1 undecidable manual P 3 68.376 97 0.13 88
IV.EMPL.HHZ. 2021-09-07T14:03:02.91 0.3 undecidable manual P 347 70.8735 96 0.28 64
IT.LNT.HGZ. 2021-09-07T14:03:00.44 0.3 undecidable manual S 333 28.9488 110 -0.28 68
IV.ACATE.HNE. 2021-09-07T14:03:00.90 0.3 undecidable manual P 267 57.6978 98 0.28 65
IV.HCRL.HHZ. 2021-09-07T14:03:00.44 0.6 undecidable manual S 337 27.2505 112 0.13 47
IV.HAGA.HHZ. 2021-09-07T14:02:59.59 0.3 undecidable manual S 1 25.3524 114 -0.25 69
IV.HVIT.HHZ. 2021-09-07T14:02:59.80 0.1 undecidable manual P 263 56.1993 98 -0.59 80
IV.HAVL.HHZ. 2021-09-07T14:02:57.30 0.6 undecidable manual S 194 11.0778 142 0.52 43
IV.HVZN.HHZ. 2021-09-07T14:02:57.73 0.1 undecidable manual P 289 40.8258 103 -0.33 88
IV.SSY.HHZ. 2021-09-07T14:02:57.38 0.6 undecidable manual S 329 13.1757 136 0.22 47
IV.ISPIC.HNZ. 2021-09-07T14:02:57.24 0.1 undecidable manual P 216 37.7289 104 -0.35 89
IV.HPAC.HHZ. 2021-09-07T14:02:57.79 0.1 undecidable manual P 100
IV.HLNI.HHZ. 2021-09-07T14:02:57.40 0.1 negative manual P 323 40.7259 103 -0.64 80
IV.HSRS.HHZ. 2021-09-07T14:02:56.59 0.6 undecidable manual S 57 7.3815 153 0.33 46
IV.HMDC.HHZ. 2021-09-07T14:02:56.75 0.1 positive manual P 252 34.3434 106 -0.34 89
IV.HCRL.HHZ. 2021-09-07T14:02:55.84 0.1 undecidable manual P 337 27.2505 112 -0.21 93
IT.LNT.HGZ. 2021-09-07T14:02:55.98 0.3 undecidable manual P 333 28.9488 110 -0.31 68
IV.HAGA.HHZ. 2021-09-07T14:02:55.36 0.1 positive manual P 1 25.3524 114 -0.42 89
IV.HAVL.HHZ. 2021-09-07T14:02:54.10 0.1 undecidable manual P 194 11.0778 142 0.09 97
IV.SSY.HHZ. 2021-09-07T14:02:54.21 0.1 undecidable manual P 329 13.1757 136 -0.02 99
IV.HSRS.HHZ. 2021-09-07T14:02:53.71 0.1 undecidable manual P 57 7.3815 153 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HSRS.HHE. ML:2.5 0.0031449999999999994 0.32 AML other m 2021-09-07T14:02:56.95
IV.HAVL.HHE. ML:2.7 0.0038 0.34 AML other m 2021-09-07T14:02:57.60
IV.HAVL.HHN. ML:2.7 0.0044800000000000005 0.34 AML other m 2021-09-07T14:02:57.61
IV.HSRS.HHN. ML:2.3 0.001925 0.64 AML other m 2021-09-07T14:02:57.87
IV.SSY.HHE. ML:3.0 0.008315 0.92 AML other m 2021-09-07T14:02:58.25
IV.SSY.HHN. ML:3.3 0.015300000000000001 0.14 AML other m 2021-09-07T14:02:59.82
IV.HAGA.HHE. ML:2.8 0.003115 1.22 AML other m 2021-09-07T14:02:59.89
IV.HAGA.HHN. ML:2.5 0.001685 0.18 AML other m 2021-09-07T14:02:59.91
IV.HCRL.HHE. ML:3.2 0.00801 0.14 AML other m 2021-09-07T14:03:00.63
IV.HCRL.HHN. ML:2.9 0.0036850000000000003 0.54 AML other m 2021-09-07T14:03:00.56
IV.HMDC.HHN. ML:2.9 0.00327 0.22 AML other m 2021-09-07T14:03:02.15
IV.HMDC.HNN. ML:2.7 0.00195 0.32 AML other m 2021-09-07T14:03:02.15
IV.HMDC.HNE. ML:2.6 0.0014750000000000002 0.08 AML other m 2021-09-07T14:03:02.18
IV.HMDC.HHE. ML:2.9 0.003005 0.08 AML other m 2021-09-07T14:03:02.18
IV.ISPIC.EHE. ML:2.3 0.0007090000000000001 1.02 AML other m 2021-09-07T14:03:02.97
IV.ISPIC.HNE. ML:2.3 0.0007379999999999999 1.02 AML other m 2021-09-07T14:03:02.46
IV.HLNI.HHE. ML:2.4 0.0007255 0.32 AML other m 2021-09-07T14:03:03.38
IV.HLNI.HHN. ML:2.4 0.0007384999999999999 0.1 AML other m 2021-09-07T14:03:03.99
IV.HVZN.HHN. ML:2.7 0.001685 0.16 AML other m 2021-09-07T14:03:05.17
IV.HVZN.HNN. ML:2.7 0.001565 0.16 AML other m 2021-09-07T14:03:05.18
IV.ISPIC.EHN. ML:2.4 0.0008240000000000001 0.16 AML other m 2021-09-07T14:03:05.61
IV.ISPIC.HNN. ML:2.4 0.0008605 0.16 AML other m 2021-09-07T14:03:05.61
IV.HVZN.HNE. ML:2.6 0.00124 0.28 AML other m 2021-09-07T14:03:05.81
IV.HVZN.HHE. ML:2.6 0.00133 0.3 AML other m 2021-09-07T14:03:05.81
IV.HVIT.HHN. ML:2.9 0.0016200000000000001 1.62 AML other m 2021-09-07T14:03:08.86
IV.HVIT.HHE. ML:2.8 0.0012349999999999998 0.16 AML other m 2021-09-07T14:03:09.09
IV.ACATE.HNE. ML:2.4 0.0005395 0.22 AML other m 2021-09-07T14:03:10.29
IV.ACATE.EHE. ML:2.7 0.0009889999999999999 0.22 AML other m 2021-09-07T14:03:10.30
IV.ACATE.HNN. ML:2.3 0.000442 0.34 AML other m 2021-09-07T14:03:10.74
IV.ACATE.EHN. ML:2.6 0.0008615000000000001 0.34 AML other m 2021-09-07T14:03:10.75
IV.EMPL.HHE. ML:2.9 0.0013199999999999998 0.78 AML other m 2021-09-07T14:03:13.57
IV.RAFF.HHN. ML:2.7 0.0008845000000000001 0.46 AML other m 2021-09-07T14:03:14.22
IV.RAFF.HHE. ML:2.6 0.0006005 0.66 AML other m 2021-09-07T14:03:14.57
IV.EMPL.HHN. ML:3.0 0.001665 0.18 AML other m 2021-09-07T14:03:15.22
IV.ESAL.HHN. ML:2.6 0.0005629999999999999 0.2 AML other m 2021-09-07T14:03:18.54
IV.GALF.HHE. ML:2.4 0.0003275 1.12 AML other m 2021-09-07T14:03:19.99
IV.EPIT.HHN. ML:2.6 0.0005785 0.28 AML other m 2021-09-07T14:03:20.08
IV.EPZF.HHE. ML:2.4 0.00026700000000000004 0.92 AML other m 2021-09-07T14:03:20.54
IV.ESAL.HHE. ML:2.7 0.000701 1.08 AML other m 2021-09-07T14:03:20.04
IV.EPIT.HHE. ML:2.6 0.000484 1.08 AML other m 2021-09-07T14:03:21.05
IV.EPZF.HHN. ML:2.4 0.000314 0.86 AML other m 2021-09-07T14:03:21.52
IV.CAGR.HHE. ML:2.3 0.0002235 0.42 AML other m 2021-09-07T14:03:21.46
IV.GALF.HHN. ML:2.5 0.00034599999999999995 1.12 AML other m 2021-09-07T14:03:23.07
IV.CAGR.HHN. ML:2.3 0.00023799999999999998 0.48 AML other m 2021-09-07T14:03:23.14
IV.CLTA.HHN. ML:2.4 0.0002265 0.72 AML other m 2021-09-07T14:03:23.59
IV.CLTA.HHE. ML:2.6 0.000321 0.42 AML other m 2021-09-07T14:03:24.76
IV.MUCR.HHE. ML:2.3 0.00015050000000000003 0.66 AML other m 2021-09-07T14:03:24.76
IV.MUCR.HHN. ML:2.0 0.00008715 1.12 AML other m 2021-09-07T14:03:29.66
IV.MSRU.HHN. ML:2.3 0.000112 0.56 AML other m 2021-09-07T14:03:32.69
IV.MSRU.HHE. ML:2.4 0.000141 0.42 AML other m 2021-09-07T14:03:33.79
IV.IVPL.HHE. ML:2.7 0.00026250000000000004 1.64 AML other m 2021-09-07T14:03:35.09
IV.IVPL.HHN. ML:2.8 0.0003025 0.46 AML other m 2021-09-07T14:03:35.14
IV.MTGR.HHN. ML:3.2 0.00032900000000000003 0.76 AML other m 2021-09-07T14:03:50.98
IV.MTGR.HHE. ML:3.0 0.00019800000000000002 1.18 AML other m 2021-09-07T14:03:55.02
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, /tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols 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 miniseed + resp format Download