Earthquake with magnitude of ML 1.4 on date 18-07-2021 and time 21:18:02 (Italy) in region 3 km SW Palagonia (CT)

A magnitude ML 1.4 earthquake occured in region: 3 km SW Palagonia (CT), on

  • 18-07-2021 19:18:02 (UTC)
  • 18-07-2021 21:18:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.302, 14.734 at 15 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Palagonia CT 3 16608 16608
Mineo CT 5 5159 21767
Militello in Val di Catania CT 6 7443 29210
Ramacca CT 10 10894 40104
Scordia CT 10 17095 57199
Grammichele CT 13 13418 70617
Francofonte SR 15 12800 83417
Vizzini CT 16 6241 89658
Licodia Eubea CT 16 3081 92739

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km SW of Catania (314555 inhabitants)
42 Km N of Ragusa (73313 inhabitants)
43 Km NE of Vittoria (63339 inhabitants)
49 Km N of Modica (54633 inhabitants)
50 Km NE of Gela (75827 inhabitants)
52 Km SW of Acireale (52622 inhabitants)
56 Km NW of Siracusa (122291 inhabitants)
63 Km E of Caltanissetta (63360 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 1.4 2021-07-18
19:18:02
37.302 14.7335 15 2021-07-18
19:27:12
Sala Sismica INGV-Roma 92930541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-18 19:18:02 ± 0.1
Latitude 37.3020 ± 0.0072
Longitude 14.7335 ± 0.0057
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 92930541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 775
Semi-minor axis of confidence ellipse (meter) 387
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 341
Circular confidence region, given by single value of horizontal uncertainty (meter) 780
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 116
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) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.11961
Epicentral distance of station farthest from the epicenter (degree) 0.5306
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 92930541
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-18 19:27:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SSY.HHZ. 2021-07-18T19:18:14.29 0.3 undecidable manual S 118 0.3067 100 0.45 67
IV.HAGA.HHZ. 2021-07-18T19:18:14.87 0.6 undecidable manual S 93 0.3354 98 0.19 47
IV.RAFF.HHZ. 2021-07-18T19:18:14.31 0.3 undecidable manual S 255 0.3058 100 0.51 66
IV.EPZF.HHE. 2021-07-18T19:18:12.60 0.1 undecidable manual P 11 0.5306 95 -0.13 92
IV.HCRL.HHZ. 2021-07-18T19:18:12.05 0.3 undecidable manual S 94 0.2383 104 0.19 72
IV.HAVL.HHE. 2021-07-18T19:18:11.28 0.6 undecidable manual P 138 0.4614 95 -0.27 45
IT.LNT.HGZ. 2021-07-18T19:18:11.27 0.1 undecidable manual S 94 0.214 107 0.11 98
IV.HMDC.HHE. 2021-07-18T19:18:09.31 0.1 undecidable manual P 173 0.3453 98 -0.26 93
IV.SSY.HHZ. 2021-07-18T19:18:09.08 1.0 undecidable manual P 118 0.3067 100 0.15 24
IV.HAGA.HHZ. 2021-07-18T19:18:09.31 1.0 negative manual P 93 0.3354 98 -0.1 24
IV.HVIT.HHE. 2021-07-18T19:18:09.49 0.1 undecidable manual P 209 0.3525 98 -0.2 94
IV.RAFF.HHZ. 2021-07-18T19:18:08.87 0.3 positive manual P 255 0.3058 100 -0.04 73
IV.HLNI.HHZ. 2021-07-18T19:18:08.56 0.6 undecidable manual S 67 0.1196 127 -0.09 50
IV.HVZN.HHZ. 2021-07-18T19:18:08.94 0.6 undecidable manual S 187 0.1241 126 0.17 50
IV.HCRL.HHZ. 2021-07-18T19:18:08.05 0.1 undecidable manual P 94 0.2383 104 0.26 94
IT.LNT.HGZ. 2021-07-18T19:18:07.16 0.1 undecidable manual P 94 0.214 107 -0.22 96
IV.HLNI.HHZ. 2021-07-18T19:18:05.72 0.1 positive manual P 67 0.1196 127 -0.21 97
IV.HVZN.HHZ. 2021-07-18T19:18:05.93 0.1 negative manual P 187 0.1241 126 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHN. ML:1.7 0.0004595 0.52 AML other m 2021-07-18T19:18:08.73
IV.HLNI.HHE. ML:1.6 0.000382 1.7 AML other m 2021-07-18T19:18:08.00
IV.HVZN.HHE. ML:1.4 0.0002065 1.04 AML other m 2021-07-18T19:18:09.41
IV.HVZN.HHN. ML:1.2 0.00013531626 0.3712 AML other m 2021-07-18T19:18:09.15
IV.SSY.HHN. ML:1.9 0.00033025395 0.256 AML other m 2021-07-18T19:18:14.94
IV.SSY.HHE. ML:1.6 0.000169853035 0.2304 AML other m 2021-07-18T19:18:15.03
IV.HVZN.HNE. ML:1.2 0.000130338645 0.3968 AML other m 2021-07-18T19:18:09.14
IV.HVZN.HNN. ML:1.2 0.00013438474 0.3584 AML other m 2021-07-18T19:18:09.15
IV.HAGA.HHE. ML:0.9 3.14642195E-5 0.2816 AML other m 2021-07-18T19:18:15.13
IV.HAGA.HHN. ML:1 4.0453886E-5 0.2816 AML other m 2021-07-18T19:18:15.25
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