Earthquake with magnitude of ML 1.6 on date 01-09-2020 and time 23:45:05 (Italy) in region 8 km S Palazzolo Acreide (SR)

A magnitude ML 1.6 earthquake occured in region: 8 km S Palazzolo Acreide (SR), on

  • 01-09-2020 21:45:05 (UTC)
  • 01-09-2020 23:45:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 36.99, 14.92 at 25 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
Palazzolo Acreide SR 8 8808 8808
Buscemi SR 11 1051 9859
Giarratana RG 13 3048 12907
Cassaro SR 13 821 13728
Canicattini Bagni SR 14 7109 20837
Ferla SR 14 2523 23360
Buccheri SR 16 1999 25359
Noto SR 17 23913 49272
Monterosso Almo RG 17 3032 52304
Ragusa RG 18 73313 125617
Rosolini SR 20 21427 147044
Chiaramonte Gulfi RG 20 8238 155282

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km E of Ragusa (73313 inhabitants)
21 Km NE of Modica (54633 inhabitants)
34 Km E of Vittoria (63339 inhabitants)
34 Km W of Siracusa (122291 inhabitants)
59 Km S of Catania (314555 inhabitants)
60 Km E of Gela (75827 inhabitants)
72 Km S of Acireale (52622 inhabitants)
94 Km SE of Caltanissetta (63360 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 1.6 2020-09-01
21:45:05
37 14.92 25 2020-09-01
21:54:31
Sala Sismica INGV-Roma 82542281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-01 21:45:05 ± 0.46
Latitude 37.00 ± 0.01
Longitude 14.92 ± 0.02
Depth (km) 25 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82542281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1800
Semi-minor axis of confidence ellipse (meter) 791
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 302
Circular confidence region, given by single value of horizontal uncertainty (meter) 1800
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 125
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.1358
Epicentral distance of station farthest from the epicenter (degree) 0.49822
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:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 82542281
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-01 21:54:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RAFF.HHZ. 2020-09-01T21:45:25.16 0.3 undecidable manual S 297 0.4982 107 1.56 39
IV.HAGA.HHZ. 2020-09-01T21:45:19.11 0.3 undecidable manual S 33 0.3453 116 -0.26 71
IV.HLNI.HHZ. 2020-09-01T21:45:19.11 0.1 undecidable manual S 354 0.3552 115 -0.52 89
IV.CROCE.HHE. 2020-09-01T21:45:18.73 0.1 undecidable manual S 242 0.3471 116 -0.7 78
IV.HPAC.HHE. 2020-09-01T21:45:18.52 0.1 undecidable manual S 162 0.3022 120 0.29 94
IV.HVZN.HHE. 2020-09-01T21:45:16.30 0.3 undecidable manual S 319 0.2446 126 -0.51 67
IV.RAFF.HHZ. 2020-09-01T21:45:16.48 0.1 undecidable manual P 297 0.4982 107 0.39 88
IV.SSY.HHZ. 2020-09-01T21:45:15.83 0.1 undecidable manual S 37 0.2041 132 -0.05 100
IV.MEU.EHZ. 2020-09-01T21:45:15.71 0.1 undecidable manual S 329 0.1358 145 1.18 67
IV.HLNI.HHZ. 2020-09-01T21:45:13.33 0.1 undecidable manual P 354 0.3552 115 -0.47 89
IV.HPAC.HHE. 2020-09-01T21:45:13.17 0.3 undecidable manual P 162 0.3022 120 0.19 72
IV.HAGA.HHZ. 2020-09-01T21:45:13.70 0.3 undecidable manual P 33 0.3453 116 0.06 72
IV.CROCE.HHE. 2020-09-01T21:45:13.18 0.3 undecidable manual P 242 0.3471 116 -0.5 64
IV.MEU.EHZ. 2020-09-01T21:45:12.33 0.3 undecidable manual P 329 0.1358 145 1.48 43
IV.HVZN.HHE. 2020-09-01T21:45:11.62 0.3 undecidable manual P 319 0.2446 126 -0.55 66
IV.SSY.HHZ. 2020-09-01T21:45:11.53 0.1 undecidable manual P 37 0.2041 132 -0.09 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHE. ML:1.6 0.00012625 0.24 AML other m 2020-09-01T21:45:19.31
IV.HLNI.HHN. ML:1.4 7.855E-5 0.82 AML other m 2020-09-01T21:45:19.34
IV.SSY.HHE. ML:2 0.00045782225 0.0768 AML other m 2020-09-01T21:45:15.92
IV.MEU.EHN. ML:1.6 0.00018773695 0.2176 AML other m 2020-09-01T21:45:15.97
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download