Earthquake with magnitude of ML 2.2 on date 08-12-2017 and time 08:35:50 (Italy) in region Costa Siracusana (Siracusa)

A magnitude ML 2.2 earthquake occured in region: Costa Siracusana (Siracusa), on

  • 08-12-2017 07:35:50 (UTC)
  • 08-12-2017 08:35:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.127, 15.701 at 25 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
37 Km E of Siracusa (122291 inhabitants)
69 Km SE of Catania (314555 inhabitants)
72 Km SE of Acireale (52622 inhabitants)
89 Km E of Modica (54633 inhabitants)
89 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.
Significant earthquakes since 1000 AD until 2006

Significant earthquakes since 1000 AD until 2006 *

This map shows the epicenters of the historical earthquakes catalogue CPT11 (Catalogo Parametrico dei Terremoti Italiani, 2011 version) with estimated magnitude ≥ 5.0 since 1000 AD until 2006. 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
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 2.2 2017-12-08
07:35:50
37.127 15.7008 25 2018-09-04
09:10:42
Bollettino Sismico Italiano INGV 55485131
Reviewed
Rev100
ML 2.2 2017-12-08
07:35:50
37.1272 15.7235 10 2017-12-08
07:48:37
Sala Sismica INGV-Roma 52429841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-12-08 07:35:50 ± 0.27
Latitude 37.1270 ± 0.0126
Longitude 15.7008 ± 0.0192
Depth (km) 25 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 55485131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1435
Semi-minor axis of confidence ellipse (meter) 1344
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 132
Circular confidence region, given by single value of horizontal uncertainty (meter) 1430
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 224
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.3984
Epicentral distance of station farthest from the epicenter (degree) 1.14304
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 13
Type of magnitude ML
Reference to an origin 55485131
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-07-03 12:52:31

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 52429841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-12-08 07:48:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.HMDC.HHZ. 2017-12-08T07:36:15.81 0.6 undecidable manual S 257 0.7509 101 0.47 45
IV.HPAC.HHZ. 2017-12-08T07:36:14.11 0.6 undecidable manual S 232 0.6754 103 0.97 36
IV.HLNI.HHZ. 2017-12-08T07:36:13.73 0.6 undecidable manual S 289 0.6961 102 0 49
MN.CEL.HHE. 2017-12-08T07:36:11.39 0.3 undecidable manual P 8 1.143 97 0.03 68
IV.RAFF.HHZ. 2017-12-08T07:36:10.32 0.3 undecidable manual P 276 1.0702 98 0.2 67
IV.NOV.HHE. 2017-12-08T07:36:09.36 0.3 undecidable manual P 334 1.0054 98 0.34 67
IV.AIO.HHE. 2017-12-08T07:36:08.04 0.3 undecidable manual P 336 0.9218 99 0.43 67
IV.SSY.HHZ. 2017-12-08T07:36:08.48 0.6 undecidable manual S 274 0.5009 108 0.34 49
IV.HAGA.HHZ. 2017-12-08T07:36:07.02 0.6 undecidable manual S 290 0.4623 109 -0.04 52
IV.AGST.EHZ. 2017-12-08T07:36:05.20 0.6 undecidable manual S 289 0.3984 113 -0.11 52
IV.HMDC.HHZ. 2017-12-08T07:36:04.39 0.1 undecidable manual P 257 0.7509 101 -0.34 93
IV.EPOZ.HNZ. 2017-12-08T07:36:04.01 0.1 undecidable manual P 323 0.6799 103 0.47 93
IV.HPAC.HHZ. 2017-12-08T07:36:03.47 0.1 undecidable manual P 232 0.6754 103 0 100
IV.HLNI.HHZ. 2017-12-08T07:36:03.36 0.1 undecidable manual P 289 0.6961 102 -0.45 91
IV.SSY.HHZ. 2017-12-08T07:36:00.26 0.1 undecidable manual P 274 0.5009 108 -0.32 98
IV.HAGA.HHZ. 2017-12-08T07:35:59.61 0.1 undecidable manual P 290 0.4623 109 -0.35 98
IV.AGST.EHZ. 2017-12-08T07:35:58.53 0.1 undecidable manual P 289 0.3984 113 -0.42 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.AGST.EHE. ML:2.1 0.0003242712 0.384 AML other m 2017-12-08T07:36:08.49
IV.SSY.HHN. ML:2.5 0.0007379926 0.1792 AML other m 2017-12-08T07:36:09.16
IV.HAGA.HHN. ML:1.9 0.000180109 0.3392 AML other m 2017-12-08T07:36:10.23
IV.HAGA.HHE. ML:1.6 8.9014345E-5 0.2624 AML other m 2017-12-08T07:36:11.53
IV.SSY.HHE. ML:2.1 0.00027515505 0.2816 AML other m 2017-12-08T07:36:12.50
IV.HLNI.HHN. ML:2.4 0.0003111395 0.416 AML other m 2017-12-08T07:36:14.18
IV.HLNI.HHE. ML:2 0.00015053745 0.2816 AML other m 2017-12-08T07:36:14.65
IV.HPAC.HHE. ML:2.3 0.0002620331 0.1984 AML other m 2017-12-08T07:36:15.41
IV.HPAC.HHN. ML:2.2 0.0002335087 0.1984 AML other m 2017-12-08T07:36:15.42
IV.HMDC.HHE. ML:2.2 0.00017328235 0.2368 AML other m 2017-12-08T07:36:16.88
IV.HMDC.HHN. ML:2.3 0.00025490885 0.2368 AML other m 2017-12-08T07:36:17.40
IV.RAFF.HHN. ML:2.3 0.00015063805 0.4032 AML other m 2017-12-08T07:36:27.37
IV.RAFF.HHE. ML:2.2 0.000104364925 0.2176 AML other m 2017-12-08T07:36:27.48
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