Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 06-04-2020 and time 16:56:56 (UTC) in region Costa Siciliana centro settentrionale (Palermo)

A magnitude ML 1.7 earthquake occured in region: Costa Siciliana centro settentrionale (Palermo), on

  • 06-04-2020 16:56:56 (UTC)
  • 06-04-2020 18:56:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.4480, 13.2940 at 9 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km N of Palermo (674435 inhabitants)
45 Km NW of Bagheria (55387 inhabitants)
83 Km NE of Trapani (68759 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.7 2020-04-06
16:56:56		 38.4483 13.2937 9 2020-07-18
21:08:40		 Bollettino Sismico Italiano INGV 80117851
Reviewed
Rev100 		ML 1.9 2020-04-06
16:56:56		 38.4577 13.3143 11 2020-04-06
17:08:16		 Sala Sismica INGV-Roma 77954881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-06 16:56:56 ± 0.19
Latitude 38.4483 ± 0.0099
Longitude 13.2937 ± 0.0218
Depth (km) 9 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 80117851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1990
Semi-minor axis of confidence ellipse (meter) 960
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 255
Circular confidence region, given by single value of horizontal uncertainty (meter) 1990.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 13
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.89123
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 77954881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-06 17:08:16

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 80117851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-12 16:17:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MNTT.EHZ. 2020-04-06T16:58:42.16 3.0 undecidable manual Sn -0.61 0
IV.MAON.HHZ. 2020-04-06T16:58:39.24 3.0 undecidable manual Sn -2.53 0
IV.ACATE.EHZ. 2020-04-06T16:57:48.72 3.0 undecidable manual Sg 0.12 0
IV.CORL.HHE. 2020-04-06T16:57:16.48 0.6 undecidable manual S 179 61.494 50 0.61 42
IV.MBFT.HHE. 2020-04-06T16:57:16.84 0.3 undecidable manual S 208 63.0924 50 0.53 65
IV.PETRA.HHE. 2020-04-06T16:57:14.57 0.6 undecidable manual P 133 98.9232 50 1.07 32
IV.CSLB.HHZ. 2020-04-06T16:57:12.04 0.3 undecidable manual P 130 87.4458 50 0.31 66
IV.SOLUN.HHZ. 2020-04-06T16:57:11.85 0.3 undecidable manual S 152 44.7219 50 0.46 69
IV.ERC.EHN. 2020-04-06T16:57:10.01 0.3 undecidable manual P 234 76.5678 50 -0.04 71
IV.MBFT.HHE. 2020-04-06T16:57:08.02 0.3 undecidable manual P 208 63.0924 50 0.04 73
IV.MPG.HHE. 2020-04-06T16:57:07.40 0.3 undecidable manual S 170 32.3454 50 -0.69 65
IV.CORL.HHE. 2020-04-06T16:57:07.32 0.6 undecidable manual P 179 61.494 50 -0.41 45
IV.USI.HHZ. 2020-04-06T16:57:07.82 0.3 undecidable manual S 341 30.4473 50 0.23 74
IV.SOLUN.HHZ. 2020-04-06T16:57:04.78 0.3 undecidable manual P 152 44.7219 50 -0.36 70
IV.MPG.HHE. 2020-04-06T16:57:02.25 0.3 undecidable manual P 170 32.3454 50 -0.99 57
IV.USI.HHZ. 2020-04-06T16:57:02.76 0.1 negative manual P 341 30.4473 50 -0.18 100
IV.IACL.HHZ. 2020-04-06T16:57:00.72 3.0 undecidable manual P 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.IACL.HHE. ML:1.4 0.00002956336 0.6144 AML other m 2020-04-06T16:57:00.57
IV.IACL.HHN. ML:1.6 0.00003795501 0.5248 AML other m 2020-04-06T16:57:03.54
IV.USI.HHE. ML:1.8 0.0002715419 0.1664 AML other m 2020-04-06T16:57:08.38
IV.USI.HHN. ML:2.2 0.0008590487 0.2048 AML other m 2020-04-06T16:57:09.02
IV.SOLUN.HHE. ML:1.8 0.0001855858 0.6528 AML other m 2020-04-06T16:57:14.55
IV.SOLUN.HHN. ML:1.7 0.00014354414 0.2688 AML other m 2020-04-06T16:57:15.90
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