Earthquake with magnitude of ML 2.1 on date 20-11-2015 and time 00:40:06 (Italy) in region Costa Siracusana (Siracusa)

A magnitude ML 2.1 earthquake occured in region: Costa Siracusana (Siracusa), on

  • 19-11-2015 23:40:06 (UTC)
  • 20-11-2015 00:40:06 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.148, 15.709 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
38 Km E of Siracusa (122291 inhabitants)
68 Km SE of Catania (314555 inhabitants)
71 Km SE of Acireale (52622 inhabitants)
90 Km E of Modica (54633 inhabitants)
90 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 2.1 2015-11-19
23:40:06
37.1478 15.7087 23 2016-02-19
13:22:41
Bollettino Sismico Italiano INGV 22719731
Reviewed
Rev100
ML 2.0 2015-11-19
23:40:06
37.1448 15.7067 11 2015-11-19
23:54:58
Sala Sismica INGV-Roma 22344091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2015-11-19 23:40:06 ± 0.17
Latitude 37.1478 ± 0.0090
Longitude 15.7087 ± 0.0124
Depth (km) 23 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 22719731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1067
Semi-minor axis of confidence ellipse (meter) 734
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 139
Circular confidence region, given by single value of horizontal uncertainty (meter) 1070
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 215
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.3984
Epicentral distance of station farthest from the epicenter (degree) 1.35618
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:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 13
Type of magnitude ML
Reference to an origin 22719731
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2016-01-25 12:04:45

ML:2

Field Value
Value 2
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 22344091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2015-11-19 23:54:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MUCR.HHZ. 2015-11-19T23:40:42.89 0.3 undecidable manual S 324 1.1125 96 0.54 58
IV.RAFF.HHZ. 2015-11-19T23:40:41.75 0.3 undecidable manual S 274 1.0747 96 0.51 59
IV.MPAZ.HHZ. 2015-11-19T23:40:34.54 0.6 undecidable manual S 16 0.8391 98 0.23 44
IV.ESML.HHZ. 2015-11-19T23:40:33.00 0.3 undecidable manual S 306 0.8094 99 -0.44 63
IV.HMDC.HHZ. 2015-11-19T23:40:31.90 0.6 undecidable manual S 256 0.7617 99 -0.16 45
IV.HPAC.HHZ. 2015-11-19T23:40:30.24 0.6 undecidable manual S 231 0.6934 100 0.19 46
IV.IVPL.HHZ. 2015-11-19T23:40:30.89 0.1 undecidable manual P 335 1.3562 54 -0.18 79
IV.MEU.SHZ. 2015-11-19T23:40:29.83 0.3 undecidable manual S 267 0.7015 100 -0.45 65
IV.HLNI.HHZ. 2015-11-19T23:40:29.73 0.3 undecidable manual S 287 0.6952 100 -0.38 66
IV.MILZ.HHZ. 2015-11-19T23:40:28.67 0.3 undecidable manual P 342 1.1844 96 0.13 63
IV.MNO.SHZ. 2015-11-19T23:40:28.19 0.6 undecidable manual P 315 1.1215 96 0.72 36
IV.MUCR.HHZ. 2015-11-19T23:40:27.17 0.1 undecidable manual P 324 1.1125 96 -0.14 84
IV.RAFF.HHZ. 2015-11-19T23:40:26.59 0.3 undecidable manual P 274 1.0747 96 -0.08 65
IV.NOV.HHZ. 2015-11-19T23:40:25.89 0.3 undecidable manual P 333 0.9893 97 0.67 57
IV.SSY.HHZ. 2015-11-19T23:40:24.50 0.3 undecidable manual S 271 0.5063 105 -0.13 72
IV.ECNV.HHZ. 2015-11-19T23:40:24.68 0.3 undecidable manual P 300 0.9092 98 0.82 54
IV.HAVL.HHZ. 2015-11-19T23:40:24.87 0.3 undecidable manual S 248 0.5045 105 0.29 70
IV.MCSR.HHZ. 2015-11-19T23:40:24.48 0.1 undecidable manual P 338 0.992 97 -0.78 72
IV.HAGA.HHZ. 2015-11-19T23:40:23.30 0.3 undecidable manual S 287 0.4614 107 -0.06 74
IV.ESML.HHZ. 2015-11-19T23:40:22.31 0.1 undecidable manual P 306 0.8094 99 0.14 90
IV.MPAZ.HHZ. 2015-11-19T23:40:22.49 0.3 undecidable manual P 16 0.8391 98 -0.18 67
IV.AGST.EHZ. 2015-11-19T23:40:21.44 0.3 undecidable manual S 286 0.3984 110 -0.14 73
IV.HMDC.HHZ. 2015-11-19T23:40:21.09 0.1 positive manual P 256 0.7617 99 -0.28 89
IV.HPAC.HHZ. 2015-11-19T23:40:20.19 0.3 undecidable manual P 231 0.6934 100 -0.02 71
IV.EPOZ.HHZ. 2015-11-19T23:40:20.22 0.3 undecidable manual P 322 0.6673 101 0.45 66
IV.MEU.SHZ. 2015-11-19T23:40:20.00 0.3 undecidable manual P 267 0.7015 100 -0.34 67
IV.HLNI.HHZ. 2015-11-19T23:40:20.00 0.1 undecidable manual P 287 0.6952 100 -0.25 91
IV.HAVL.HHZ. 2015-11-19T23:40:17.16 0.1 undecidable manual P 248 0.5045 105 0.1 97
IV.SSY.HHZ. 2015-11-19T23:40:17.20 0.1 undecidable manual P 271 0.5063 105 0.12 97
IV.HAGA.HHZ. 2015-11-19T23:40:16.39 0.1 undecidable manual P 287 0.4614 107 0.04 99
IV.AGST.EHZ. 2015-11-19T23:40:15.40 0.1 undecidable manual P 286 0.3984 110 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.AGST.EHN. ML:2.2 0.000424 0.82 AML other m 2015-11-19T23:40:21.61
IV.AGST.EHE. ML:2.3 0.0005025 0.18 AML other m 2015-11-19T23:40:21.60
IV.ECNV.HHN. ML:1.8 6.345E-5 1.58 AML other m 2015-11-19T23:40:40.42
IV.ECNV.HHE. ML:1.8 5.7E-5 1.42 AML other m 2015-11-19T23:40:48.06
IV.HAGA.HHE. ML:2 0.0002345 1.26 AML other m 2015-11-19T23:40:23.45
IV.HAGA.HHN. ML:2.1 0.0002695 0.14 AML other m 2015-11-19T23:40:23.63
IV.HAVL.HHE. ML:2.5 0.000737 0.12 AML other m 2015-11-19T23:40:25.52
IV.HAVL.HHN. ML:2.6 0.0007775 0.36 AML other m 2015-11-19T23:40:25.54
IV.HLNI.HHE. ML:2.1 0.000167 0.32 AML other m 2015-11-19T23:40:29.91
IV.HLNI.HHN. ML:2.2 0.000206 0.26 AML other m 2015-11-19T23:40:30.38
IV.HMDC.HHE. ML:2.4 0.000309 0.16 AML other m 2015-11-19T23:40:32.18
IV.HMDC.HHN. ML:2.4 0.000277 0.9 AML other m 2015-11-19T23:40:32.53
IV.HPAC.HHE. ML:2.2 0.000214 0.18 AML other m 2015-11-19T23:40:30.92
IV.HPAC.HHN. ML:2.2 0.000222 0.36 AML other m 2015-11-19T23:40:33.32
IV.MCSR.HHE. ML:1.8 5.74E-5 0.3 AML other m 2015-11-19T23:40:46.91
IV.MCSR.HHN. ML:2 7.425E-5 0.82 AML other m 2015-11-19T23:40:50.22
IV.MEU.SHE. ML:0 0.0001955 0.36 AML other m 2015-11-19T23:40:32.25
IV.MEU.SHN. ML:0 0.0004185 0.28 AML other m 2015-11-19T23:40:37.13
IV.MUCR.HHE. ML:1.6 3.06E-5 0.34 AML other m 2015-11-19T23:40:49.55
IV.MUCR.HHN. ML:1.7 3.56E-5 0.5 AML other m 2015-11-19T23:40:49.20
IV.NOV.HHN. ML:1.5 2.645E-5 0.9 AML other m 2015-11-19T23:40:47.95
IV.NOV.HHE. ML:1.6 3.015E-5 0.68 AML other m 2015-11-19T23:40:45.87
IV.RAFF.HHN. ML:2 7.115E-5 1.2 AML other m 2015-11-19T23:40:43.04
IV.RAFF.HHE. ML:2 8.175E-5 0.54 AML other m 2015-11-19T23:40:42.65
IV.SSY.HHE. ML:2 0.000222 1.36 AML other m 2015-11-19T23:40:26.80
IV.SSY.HHN. ML:2.4 0.000521 0.18 AML other m 2015-11-19T23:40:26.94
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