Earthquake with magnitude of ML 1.7 on date 02-05-2021 and time 05:30:44 (Italy) in region Costa Siracusana (Siracusa)

A magnitude ML 1.7 earthquake occured in region: Costa Siracusana (Siracusa), on

  • 02-05-2021 03:30:44 (UTC)
  • 02-05-2021 05:30:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.128, 15.591 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
27 Km E of Siracusa (122291 inhabitants)
61 Km SE of Catania (314555 inhabitants)
66 Km SE of Acireale (52622 inhabitants)
79 Km E of Modica (54633 inhabitants)
80 Km E of Ragusa (73313 inhabitants)
95 Km E of Vittoria (63339 inhabitants)
Recent and historical seismicity
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 the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.7 2021-05-02
03:30:44
37.1277 15.5907 10 2021-05-02
03:45:46
Sala Sismica INGV-Roma 89690671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-02 03:30:44 ± 0.19
Latitude 37.1277 ± 0.0072
Longitude 15.5907 ± 0.0056
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 89690671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 747
Semi-minor axis of confidence ellipse (meter) 564
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 207
Circular confidence region, given by single value of horizontal uncertainty (meter) 750
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 311
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.29588
Epicentral distance of station farthest from the epicenter (degree) 0.69877
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 89690671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-02 03:45:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.HMDC.HHZ. 2021-05-02T03:31:07.30 0.3 undecidable manual S 256 0.6655 50 0.02 72
IV.HVZN.HHZ. 2021-05-02T03:31:07.92 3.0 undecidable manual S 274 0.6988 50 -0.34 0
IV.HLNI.HHZ. 2021-05-02T03:31:05.40 0.1 undecidable manual S 291 0.6124 50 -0.31 92
IV.HCRL.HHZ. 2021-05-02T03:31:01.70 0.1 undecidable manual S 289 0.4703 50 0.21 96
IV.HAVL.HHZ. 2021-05-02T03:30:59.60 0.3 undecidable manual S 246 0.4101 50 -0.09 75
IV.SSY.HHZ. 2021-05-02T03:30:59.90 0.6 undecidable manual S 274 0.4128 50 0.12 50
IV.HVZN.HHZ. 2021-05-02T03:30:58.53 0.1 undecidable manual P 274 0.6988 50 0.17 93
IV.HAGA.HHZ. 2021-05-02T03:30:58.90 0.3 undecidable manual S 295 0.3804 50 0.07 76
IV.HMDC.HHZ. 2021-05-02T03:30:57.62 0.1 undecidable manual P 256 0.6655 50 -0.18 93
IV.HLNI.HHZ. 2021-05-02T03:30:56.65 0.1 undecidable manual P 291 0.6124 50 -0.24 93
IV.HCRL.HHZ. 2021-05-02T03:30:54.57 0.1 undecidable manual P 289 0.4703 50 0.11 98
IV.SSY.HHZ. 2021-05-02T03:30:53.51 0.3 undecidable manual P 274 0.4128 50 0.04 76
IV.HAVL.HHZ. 2021-05-02T03:30:53.51 0.1 undecidable manual P 246 0.4101 50 0.09 100
IV.HAGA.HHZ. 2021-05-02T03:30:52.92 0.3 undecidable manual P 295 0.3804 50 0 77
IV.HSRS.HHE. 2021-05-02T03:30:51.50 0.3 undecidable manual P 263 0.2959 50 0.03 78
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HAVL.HHN. ML:1.8 0.000203 1.52 AML other m 2021-05-02T03:31:00.22
IV.HAVL.HHE. ML:1.8 0.0002115 0.88 AML other m 2021-05-02T03:31:00.55
IV.HCRL.HHE. ML:1.7 0.00011715 1.22 AML other m 2021-05-02T03:31:02.12
IV.HCRL.HHN. ML:1.7 0.0001175 0.42 AML other m 2021-05-02T03:31:05.57
IV.HLNI.HHE. ML:1.6 6.725E-5 0.4 AML other m 2021-05-02T03:31:05.77
IV.HLNI.HHN. ML:1.9 0.00012395 0.64 AML other m 2021-05-02T03:31:06.77
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