Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 15-01-2021 and time 13:59:54 (Italy) in region 5 km N Sperlinga (EN)

A magnitude ML 1.8 earthquake occured in region: 5 km N Sperlinga (EN), on

  • 15-01-2021 12:59:54 (UTC)
  • 15-01-2021 13:59:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.81, 14.35 at 9 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sperlinga EN 5 805 805
Nicosia EN 8 13899 14704
Castel di Lucio ME 10 1294 15998
Gangi PA 12 6811 22809
Capizzi ME 13 3176 25985
Mistretta ME 14 4791 30776
Cerami EN 14 2006 32782
Geraci Siculo PA 18 1945 34727
San Mauro Castelverde PA 18 1701 36428
Pettineo ME 19 1350 37778
Reitano ME 19 806 38584
Leonforte EN 19 13439 52023
Nissoria EN 19 3000 55023
Gagliano Castelferrato EN 20 3593 58616
Motta d'Affermo ME 20 739 59355

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km NE of Caltanissetta (63360 inhabitants)
73 Km W of Catania (314555 inhabitants)
75 Km W of Acireale (52622 inhabitants)
79 Km E of Bagheria (55387 inhabitants)
83 Km N of Gela (75827 inhabitants)
87 Km NE of Agrigento (59770 inhabitants)
93 Km E of Palermo (674435 inhabitants)
97 Km N of Vittoria (63339 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 1.8 2021-01-15
12:59:54		 37.81 14.35 9 2021-01-15
13:15:23		 Sala Sismica INGV-Roma 86269011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-15 12:59:54 ± 0.17
Latitude 37.81 ± 0.02
Longitude 14.35 ± 0.01
Depth (km) 9 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86269011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2310
Semi-minor axis of confidence ellipse (meter) 783
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 190
Circular confidence region, given by single value of horizontal uncertainty (meter) 2310
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.71856
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 86269011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-15 13:15:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.USI.HHZ. 2021-01-15T13:00:18.60 3.0 undecidable manual P -0.45 0
IV.AIO.HHZ. 2021-01-15T13:00:08.94 1.0 undecidable manual P 76 0.7186 50 0.13 24
IV.MSFR.HHZ. 2021-01-15T13:00:07.36 0.3 undecidable manual S 40 0.2986 50 0.74 68
IV.PLLN.EHZ. 2021-01-15T13:00:05.46 0.1 undecidable manual S 319 0.2455 108 0.71 100
IV.CSLB.HHZ. 2021-01-15T13:00:05.54 0.3 undecidable manual S 300 0.2626 107 0.17 81
IV.EPZF.HHE. 2021-01-15T13:00:04.16 0.6 undecidable manual P 87 0.4038 50 0.73 43
IV.MUCR.HHZ. 2021-01-15T13:00:04.06 0.3 undecidable manual P 60 0.4784 50 -0.65 69
IV.GALF.HHZ. 2021-01-15T13:00:03.49 0.3 undecidable manual S 119 0.1988 112 0.45 79
IV.PETRA.HHE. 2021-01-15T13:00:02.99 0.6 undecidable manual S 279 0.1844 113 0.44 53
IV.RESU.HHZ. 2021-01-15T13:00:01.66 0.6 positive manual P 235 0.2788 106 0.41 47
IV.GIB.HHE. 2021-01-15T13:00:01.36 0.6 undecidable manual P 306 0.3121 50 -0.51 51
IV.MSFR.HHZ. 2021-01-15T13:00:01.11 0.3 undecidable manual P 40 0.2986 50 -0.52 75
IV.CSLB.HHZ. 2021-01-15T13:00:00.11 1.0 negative manual P 300 0.2626 107 -0.8 23
IV.PLLN.EHZ. 2021-01-15T13:00:00.33 0.3 undecidable manual P 319 0.2455 108 -0.22 79
IV.CAGR.HHE. 2021-01-15T13:00:00.27 0.6 undecidable manual P 147 0.2203 110 0.25 53
IV.GALF.HHZ. 2021-01-15T12:59:59.00 0.1 negative manual P 119 0.1988 112 -0.56 98
IV.PETRA.HHE. 2021-01-15T12:59:59.25 0.6 undecidable manual P 279 0.1844 113 -0.03 56
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HHE. ML:2.4 0.001815 0.42 AML other m 2021-01-15T13:00:05.60
IV.GALF.HNE. ML:1.5 0.00022044625 0.6592 AML other m 2021-01-15T13:00:07.96
IV.GALF.HHN. ML:2.6 0.002958271 0.5568 AML other m 2021-01-15T13:00:06.36
IV.GALF.HNN. ML:1.8 0.000411 0.56 AML other m 2021-01-15T13:00:06.92
IV.CSLB.HHE. ML:1.3 0.00010135 0.7 AML other m 2021-01-15T13:00:09.15
IV.PLLN.EHE. ML:1.9 0.00047004135 0.4032 AML other m 2021-01-15T13:00:10.90
IV.CSLB.HHN. ML:1.3 0.00011094435 0.4992 AML other m 2021-01-15T13:00:14.25
IV.PLLN.EHN. ML:2 0.0005295 0.48 AML other m 2021-01-15T13:00:11.52
IV.RESU.HHE. ML:2 0.0004715 0.52 AML other m 2021-01-15T13:00:12.34
IV.RESU.HHN. ML:2.1 0.000576 0.44 AML other m 2021-01-15T13:00:14.65
IV.MUCR.HHE. ML:1.8 0.00016546575 0.3584 AML other m 2021-01-15T13:00:14.95
IV.MUCR.HHN. ML:1.7 0.000131907875 0.3392 AML other m 2021-01-15T13:00:19.48
IV.MSFR.HHE. ML:1.3 8.239132E-5 0.3584 AML other m 2021-01-15T13:00:10.12
IV.MSFR.HHN. ML:1.5 0.000126849355 0.5824 AML other m 2021-01-15T13:00:10.28
IV.AIO.HHE. ML:1.7 7.493598E-5 0.5184 AML other m 2021-01-15T13:00:32.98
IV.AIO.HHN. ML:1.8 8.051132E-5 0.6784 AML other m 2021-01-15T13:00:31.18
IV.USI.HHE. ML:2.6 0.00021663445 0.9344 AML other m 2021-01-15T13:00:56.31
IV.USI.HHN. ML:3.1 0.00067027865 0.9216 AML other m 2021-01-15T13:00:22.71
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