Earthquake with magnitude of ML 2.7 on date 24-08-2021 and time 18:34:11 (UTC) in region Costa Siracusana (Siracusa)

A magnitude ML 2.7 earthquake occured in region: Costa Siracusana (Siracusa), on

  • 24-08-2021 18:34:11 (UTC)
  • 24-08-2021 20:34:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.093, 15.672 at 23 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Siracusa (122291 inhabitants)
69 Km SE of Catania (314555 inhabitants)
73 Km SE of Acireale (52622 inhabitants)
85 Km E of Modica (54633 inhabitants)
86 Km E of Ragusa (73313 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
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 2.7 2021-08-24
18:34:11
37.0928 15.6723 23 2021-12-29
11:12:23
Bollettino Sismico Italiano INGV 94862161
Reviewed
Rev100
ML 2.7 2021-08-24
18:34:11
37.0922 15.6533 14 2021-08-24
18:47:47
Sala Sismica INGV-Roma 94595411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-24 18:34:11 ± 0.19
Latitude 37.0928 ± 0.0090
Longitude 15.6723 ± 0.0147
Depth (km) 23 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 94862161

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1327
Semi-minor axis of confidence ellipse (meter) 743
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 302
Circular confidence region, given by single value of horizontal uncertainty (meter) 1330
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 209
Number of associated phases, regardless of their use for origin computation 70
Number of defining phases 46
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.53334
Number of stations at which the event was observed 53
Number of stations from which data was used for origin computation 32
Magnitudes information

ML:2.7

Field Value
Value 2.7
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 94862161
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-01 12:45:09

ML:2.7

Field Value
Value 2.7
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 94595411
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-24 18:47:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RMP.HHZ. 2021-08-24T18:36:15.02 3.0 undecidable manual Sn -7.21 0
AC.VLO.HHZ. 2021-08-24T18:36:05.21 3.0 undecidable manual Sn -7.8 0
IV.NARO.HHZ. 2021-08-24T18:35:56.21 3.0 negative manual Pn 4.53 0
IV.MPAG.EHZ. 2021-08-24T18:35:56.90 3.0 positive manual Pn 5.58 0
IV.ATVO.HHZ. 2021-08-24T18:35:55.39 3.0 positive manual Pn 6.01 0
IV.PIEI.HHZ. 2021-08-24T18:35:55.12 3.0 undecidable manual Pn 4.25 0
IV.ATPI.EHZ. 2021-08-24T18:35:55.63 3.0 positive manual Pn 5.36 0
IV.ATFO.HHZ. 2021-08-24T18:35:54.06 3.0 undecidable manual Pn 5.48 0
IV.SGO.HHZ. 2021-08-24T18:35:53.54 3.0 undecidable manual Sg 13.3 0
IV.FRON.EHZ. 2021-08-24T18:35:53.13 3.0 undecidable manual Pn 3.14 0
IV.AMUR.HHZ. 2021-08-24T18:35:50.61 3.0 undecidable manual Sn -1.42 0
IV.NOCI.HHZ. 2021-08-24T18:35:49.49 3.0 undecidable manual Sn -2.7 0
IX.SCL3.EHZ.02 2021-08-24T18:35:41.13 3.0 undecidable manual Sn -2.44 0
IV.VIVA.HHZ. 2021-08-24T18:35:37.44 3.0 undecidable manual Pg 10 0
IV.MIDA.HHZ. 2021-08-24T18:35:36.67 3.0 undecidable manual Pg 15.72 0
IV.POFI.HHZ. 2021-08-24T18:35:34.02 3.0 undecidable manual Pg 10.63 0
IV.RMP.HHZ. 2021-08-24T18:35:24.47 3.0 negative manual Pn -4.03 0
OT.OT05.EHZ. 2021-08-24T18:35:20.70 3.0 undecidable manual Pn 0.67 0
IV.SGTA.HHZ. 2021-08-24T18:35:19.36 3.0 undecidable manual Pg 6.58 0
IV.MFNL.HHZ. 2021-08-24T18:35:15.65 3.0 undecidable manual Sn 1 0
IV.MRVN.HHZ. 2021-08-24T18:35:12.40 3.0 undecidable manual Pn -0.18 0
IV.AMUR.HHZ. 2021-08-24T18:35:10.54 3.0 undecidable manual Pn -0.99 0
IV.NOCI.HHZ. 2021-08-24T18:35:08.87 3.0 positive manual Pn -2.75 0
OT.TAR1.HHZ. 2021-08-24T18:35:05.70 3.0 positive manual Pn -3.63 0
IV.PLAC.HHE. 2021-08-24T18:34:55.48 0.6 undecidable manual S 24 1.4848 54 -0.79 30
IV.MUCR.HHZ. 2021-08-24T18:34:48.01 0.6 undecidable manual S 327 1.1412 96 0.4 40
IV.SOI.EHN. 2021-08-24T18:34:43.37 0.3 undecidable manual S 17 1.0252 97 -0.84 52
IV.MTTG.HHE. 2021-08-24T18:34:40.50 0.6 undecidable manual S 1 0.9101 98 -0.31 42
IV.CSLB.HHZ. 2021-08-24T18:34:38.26 0.3 undecidable manual P 304 1.5333 54 0.38 52
IV.PLLN.EHZ. 2021-08-24T18:34:38.36 0.3 undecidable manual P 307 1.5091 54 0.82 45
IV.RESU.HHZ. 2021-08-24T18:34:37.46 0.3 undecidable manual P 294 1.3975 54 1.46 35
IV.PLAC.HHE. 2021-08-24T18:34:36.89 0.3 undecidable manual P 24 1.4848 54 -0.32 54
IV.HVZN.HHE. 2021-08-24T18:34:36.09 0.6 undecidable manual S 277 0.7671 99 -0.53 42
IV.HMDC.HHZ. 2021-08-24T18:34:34.77 0.3 undecidable manual S 260 0.7222 100 -0.53 63
IV.MSFR.HHZ. 2021-08-24T18:34:34.18 0.3 undecidable manual P 318 1.2716 54 -0.09 61
IV.ISPIC.EHE. 2021-08-24T18:34:33.86 0.6 undecidable manual S 243 0.6889 101 -0.49 43
IV.HLNI.HHE. 2021-08-24T18:34:33.51 0.6 undecidable manual S 292 0.6862 101 -0.76 39
IV.MCPD.HHZ. 2021-08-24T18:34:33.95 0.3 undecidable manual P 324 1.268 54 -0.27 59
IV.HPAC.HHE. 2021-08-24T18:34:33.00 0.3 undecidable manual S 233 0.6367 102 0.18 69
IV.MILZ.HHN. 2021-08-24T18:34:33.08 0.6 undecidable manual P 344 1.2285 54 -0.59 37
IV.MSRU.HHZ. 2021-08-24T18:34:32.08 0.3 undecidable manual P 354 1.1772 96 -0.75 52
IV.MPNC.HHZ. 2021-08-24T18:34:31.82 0.3 undecidable manual P 347 1.0828 96 0.6 57
IT.LNT.HGZ. 2021-08-24T18:34:31.25 0.6 undecidable manual S 290 0.5684 103 0.41 45
IV.GALF.HHZ. 2021-08-24T18:34:31.42 0.1 undecidable manual P 305 1.0729 96 0.37 81
IV.MUCR.HHZ. 2021-08-24T18:34:31.93 0.3 undecidable manual P 327 1.1412 96 -0.28 61
IV.EPZF.HHZ. 2021-08-24T18:34:30.15 0.1 undecidable manual P 319 0.9758 97 0.75 73
IV.HCRL.HHE. 2021-08-24T18:34:30.51 0.6 undecidable manual S 291 0.5441 104 0.37 46
IV.SOI.EHN. 2021-08-24T18:34:30.25 0.3 undecidable manual P 17 1.0252 97 0.01 66
IV.NOV.HHZ. 2021-08-24T18:34:29.84 0.3 undecidable manual P 336 1.0261 97 -0.41 61
IV.MTTG.HHE. 2021-08-24T18:34:28.63 0.3 undecidable manual P 1 0.9101 98 0.35 63
IV.AIO.HHE. 2021-08-24T18:34:28.44 0.3 undecidable manual P 339 0.9443 97 -0.43 62
IV.EMSG.HHZ. 2021-08-24T18:34:28.83 0.1 positive manual P 322 0.9263 98 0.27 86
IV.ECTS.HHZ. 2021-08-24T18:34:28.06 0.3 undecidable manual P 331 0.902 98 -0.08 67
IV.HAVL.HHE. 2021-08-24T18:34:27.69 0.6 undecidable manual S 253 0.4587 107 -0.03 50
IV.HAGA.HHE. 2021-08-24T18:34:27.12 0.6 undecidable manual S 295 0.4542 107 -0.48 45
IV.EVRN.HNN. 2021-08-24T18:34:26.00 0.3 undecidable manual P 325 0.7329 100 0.71 59
IV.EFIU.HHE. 2021-08-24T18:34:26.73 0.6 undecidable manual P 332 0.7869 99 0.52 42
IV.ESAL.HHE. 2021-08-24T18:34:26.95 0.3 undecidable manual P 327 0.7878 99 0.74 57
IV.HVZN.HHE. 2021-08-24T18:34:25.72 0.1 undecidable manual P 277 0.7671 99 -0.15 91
IV.HSRS.HNN. 2021-08-24T18:34:24.74 0.6 undecidable manual S 270 0.3588 113 -0.19 49
IV.EPOZ.HHZ. 2021-08-24T18:34:24.97 0.3 undecidable manual P 327 0.6943 101 0.32 67
IV.ISPIC.EHE. 2021-08-24T18:34:24.30 0.1 undecidable manual P 243 0.6889 101 -0.25 91
IV.HMDC.HHZ. 2021-08-24T18:34:24.80 0.1 undecidable manual P 260 0.7222 100 -0.31 89
IV.HLNI.HHE. 2021-08-24T18:34:24.16 0.1 undecidable manual P 292 0.6862 101 -0.35 89
IV.HPAC.HHE. 2021-08-24T18:34:23.84 0.1 undecidable manual P 233 0.6367 102 0.17 93
IV.HCRL.HHE. 2021-08-24T18:34:22.13 0.1 undecidable manual P 291 0.5441 104 0.01 98
IT.LNT.HGZ. 2021-08-24T18:34:22.43 0.3 undecidable manual P 290 0.5684 103 -0.1 72
IV.HAGA.HHE. 2021-08-24T18:34:20.56 0.1 undecidable manual P 295 0.4542 107 -0.09 98
IV.HAVL.HHE. 2021-08-24T18:34:20.80 0.1 undecidable manual P 253 0.4587 107 0.07 98
IV.HSRS.HNN. 2021-08-24T18:34:19.21 0.1 undecidable manual P 270 0.3588 113 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HMDC.HHE. ML:3.1 0.00161 1.04 AML other m 2021-08-24T18:34:35.16
IV.HMDC.HNE. ML:3 0.00134 0.7 AML other m 2021-08-24T18:34:35.34
IV.HMDC.HHN. ML:3.2 0.00215 0.26 AML other m 2021-08-24T18:34:35.23
IV.HMDC.HNN. ML:3.3 0.002525 0.28 AML other m 2021-08-24T18:34:35.23
IV.MPNC.HHN. ML:2.6 0.0003095 0.26 AML other m 2021-08-24T18:34:49.86
IV.MSRU.HHN. ML:2.6 0.000239 1.72 AML other m 2021-08-24T18:34:50.97
IV.EMSG.HHE. ML:2.6 0.0003625 0.54 AML other m 2021-08-24T18:34:51.01
IV.MSRU.HHE. ML:2.6 0.000249 1.12 AML other m 2021-08-24T18:34:52.56
IV.EPZF.HHN. ML:2.8 0.000494 0.32 AML other m 2021-08-24T18:34:52.18
IV.EMSG.HHN. ML:2.5 0.000319 1.08 AML other m 2021-08-24T18:34:52.85
IV.MILZ.HHE. ML:3.2 0.000863 0.78 AML other m 2021-08-24T18:34:52.09
IV.NOV.HHE. ML:3 0.0007875 0.82 AML other m 2021-08-24T18:34:52.16
IV.NOV.HHN. ML:3 0.000795 0.32 AML other m 2021-08-24T18:34:53.47
IV.MPNC.HHE. ML:2.7 0.0003785 0.38 AML other m 2021-08-24T18:34:54.61
IV.EPZF.HHE. ML:2.6 0.0003145 0.58 AML other m 2021-08-24T18:34:54.36
IV.MUCR.HHE. ML:2.8 0.0004325 0.34 AML other m 2021-08-24T18:34:55.56
IV.MUCR.HHN. ML:2.7 0.000331 0.4 AML other m 2021-08-24T18:34:55.50
IV.MSFR.HHN. ML:2.2 7.845E-5 1.12 AML other m 2021-08-24T18:34:57.09
IV.MSFR.HHE. ML:2.2 9.085E-5 1.04 AML other m 2021-08-24T18:34:58.76
IV.MCPD.HHE. ML:2.6 0.000204 0.94 AML other m 2021-08-24T18:34:58.26
IV.MCPD.HHN. ML:2.5 0.000176 0.34 AML other m 2021-08-24T18:34:58.94
IV.GALF.HHE. ML:3 0.0007095 0.44 AML other m 2021-08-24T18:34:59.76
IV.GALF.HHN. ML:2.8 0.000512 0.4 AML other m 2021-08-24T18:34:59.72
IV.MILZ.HHN. ML:2.8 0.000338 0.4 AML other m 2021-08-24T18:35:00.23
IV.RESU.HHE. ML:2.3 9.325E-5 0.48 AML other m 2021-08-24T18:35:02.66
IV.CSLB.HHN. ML:2 4.045E-5 1.44 AML other m 2021-08-24T18:35:09.98
IV.PLLN.EHN. ML:2.7 0.0002275 0.64 AML other m 2021-08-24T18:35:09.49
IV.RESU.HHN. ML:2.4 0.0001257 1.24 AML other m 2021-08-24T18:35:12.27
IV.CSLB.HHE. ML:2.1 4.91E-5 1.26 AML other m 2021-08-24T18:35:13.12
IV.GIB.HHE. ML:0 0.0001395 0.56 AML other m 2021-08-24T18:35:15.43
IV.PLLN.EHE. ML:2.6 0.0001745 0.68 AML other m 2021-08-24T18:35:16.36
IV.GIB.HHN. ML:0 0.0001555 1.46 AML other m 2021-08-24T18:35:17.82
IV.MRVN.HHE. ML:2.8 3.1E-5 0.6 AML other m 2021-08-24T18:35:57.97
IV.MRVN.HHN. ML:2.8 2.495E-5 0.7 AML other m 2021-08-24T18:35:59.19
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, http://terremoti.ingv.it/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