Earthquake with magnitude of ML 1.7 on date 22-06-2021 and time 03:25:51 (Italy) in region Costa Siracusana (Siracusa)

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

  • 22-06-2021 01:25:51 (UTC)
  • 22-06-2021 03:25:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.069, 15.598 at 23 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)
66 Km SE of Catania (314555 inhabitants)
72 Km SE of Acireale (52622 inhabitants)
78 Km E of Modica (54633 inhabitants)
79 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 2021-06-22
01:25:51
37.0687 15.5985 23 2021-06-22
01:40:08
Sala Sismica INGV-Roma 91681051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-22 01:25:51 ± 0.12
Latitude 37.0687 ± 0.0054
Longitude 15.5985 ± 0.0090
Depth (km) 23 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 91681051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 713
Semi-minor axis of confidence ellipse (meter) 550
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 39
Circular confidence region, given by single value of horizontal uncertainty (meter) 710
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 289
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.30127
Epicentral distance of station farthest from the epicenter (degree) 0.71226
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 91681051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-22 01:40:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.HVZN.HHZ. 2021-06-22T01:26:15.31 0.3 undecidable manual S 279 0.7123 100 -0.29 66
IV.HMDC.HHZ. 2021-06-22T01:26:14.20 0.3 undecidable manual S 261 0.6601 101 0.12 69
IV.HLNI.HHZ. 2021-06-22T01:26:13.39 0.6 undecidable manual S 296 0.6421 101 -0.18 46
IV.HPAC.HHZ. 2021-06-22T01:26:11.85 0.3 undecidable manual S 231 0.5756 103 0.23 69
IV.HCRL.HHZ. 2021-06-22T01:26:09.52 0.3 undecidable manual S 296 0.4991 105 0.09 72
IV.SSY.HHZ. 2021-06-22T01:26:07.65 0.3 undecidable manual S 282 0.4281 108 0.25 71
IV.HAVL.HHZ. 2021-06-22T01:26:06.57 0.3 undecidable manual S 254 0.3957 110 0.07 74
IV.HAGA.HHZ. 2021-06-22T01:26:06.91 0.3 undecidable manual S 302 0.4146 109 -0.11 73
IV.HVZN.HHZ. 2021-06-22T01:26:05.70 0.6 negative manual P 279 0.7123 100 0.17 45
IV.HLNI.HHZ. 2021-06-22T01:26:04.22 0.1 positive manual P 296 0.6421 101 -0.14 93
IV.HMDC.HHZ. 2021-06-22T01:26:04.32 0.3 undecidable manual P 261 0.6601 101 -0.33 66
IV.HSRS.HHE. 2021-06-22T01:26:03.86 0.3 undecidable manual S 275 0.3013 117 -0.07 76
IV.HPAC.HHZ. 2021-06-22T01:26:03.35 0.1 positive manual P 231 0.5756 103 0.12 94
IV.HCRL.HHZ. 2021-06-22T01:26:02.05 0.1 undecidable manual P 296 0.4991 105 0.08 96
IV.HAVL.HHZ. 2021-06-22T01:26:00.27 0.1 positive manual P 254 0.3957 110 -0.01 100
IV.HAGA.HHZ. 2021-06-22T01:26:00.67 0.6 negative manual P 302 0.4146 109 0.09 49
IV.SSY.HHZ. 2021-06-22T01:26:00.88 0.1 negative manual P 282 0.4281 108 0.08 98
IV.HSRS.HHE. 2021-06-22T01:25:58.62 0.1 undecidable manual P 275 0.3013 117 -0.17 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HAGA.HHE. ML:1.2 4.345E-5 0.64 AML other m 2021-06-22T01:26:07.50
IV.HAVL.HHE. ML:1.4 6.825E-5 0.48 AML other m 2021-06-22T01:26:07.11
IV.HAVL.HHN. ML:1.5 8.36E-5 1.08 AML other m 2021-06-22T01:26:07.62
IV.HAGA.HHN. ML:1.5 8.11E-5 0.74 AML other m 2021-06-22T01:26:07.83
IV.SSY.HHN. ML:2.3 0.000573 0.38 AML other m 2021-06-22T01:26:08.41
IV.SSY.HHE. ML:1.9 0.000188 0.54 AML other m 2021-06-22T01:26:09.34
IV.HCRL.HHN. ML:1.8 0.0001285 0.32 AML other m 2021-06-22T01:26:10.31
IV.HCRL.HHE. ML:1.9 0.0001685 0.6 AML other m 2021-06-22T01:26:10.48
IV.HPAC.HHE. ML:2 0.000189 0.14 AML other m 2021-06-22T01:26:12.38
IV.HPAC.HHN. ML:1.9 0.0001525 0.18 AML other m 2021-06-22T01:26:12.40
IV.HLNI.HHE. ML:1.6 6.63E-5 1.12 AML other m 2021-06-22T01:26:14.85
IV.HLNI.HHN. ML:1.7 7.465E-5 0.96 AML other m 2021-06-22T01:26:14.84
IV.HMDC.HHE. ML:1.6 6.565E-5 0.28 AML other m 2021-06-22T01:26:14.77
IV.HMDC.HHN. ML:1.5 5.23E-5 0.56 AML other m 2021-06-22T01:26:17.72
IV.HVZN.HHE. ML:1.8 9.75E-5 0.82 AML other m 2021-06-22T01:26:18.00
IV.HVZN.HHN. ML:1.8 8.915E-5 1.18 AML other m 2021-06-22T01:26:18.33
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