Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 31-07-2020 and time 01:07:50 (Italy) in region Tirreno Meridionale (MARE)

A magnitude ML 1.7 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 30-07-2020 23:07:50 (UTC)
  • 31-07-2020 01:07:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.4970, 15.5390 at 130 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
34 Km N of Messina (238439 inhabitants)
44 Km N of Reggio di Calabria (183035 inhabitants)
86 Km SW of Lamezia Terme (70714 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 2020-07-30
23:07:50		 38.4967 15.5392 130 2020-11-19
12:36:59		 Bollettino Sismico Italiano INGV 82587111
Reviewed
Rev100 		ML 1.8 2020-07-30
23:07:50		 38.4808 15.5008 132 2020-07-30
23:17:56		 Sala Sismica INGV-Roma 81499461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-30 23:07:50 ± 0.35
Latitude 38.4967 ± 0.0180
Longitude 15.5392 ± 0.0276
Depth (km) 130 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 82587111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1978
Semi-minor axis of confidence ellipse (meter) 1781
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 130
Circular confidence region, given by single value of horizontal uncertainty (meter) 1980.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.08098
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 82587111
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-09-16 17:53:04

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 81499461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-30 23:17:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RONT.HHZ. 2020-07-30T23:09:49.64 3.0 undecidable manual Pg 25.48 0
MN.TRI.HHZ. 2020-07-30T23:09:44.67 3.0 undecidable manual Pn 7.2 0
IV.ROSPO.HHZ. 2020-07-30T23:09:34.97 3.0 undecidable manual Sn 3.02 0
IV.LPEL.HNZ. 2020-07-30T23:09:29.41 3.0 undecidable manual Sn -1.38 0
IV.SRES.HHZ. 2020-07-30T23:09:14.08 3.0 undecidable manual Pg 15.78 0
IV.MCRV.HHZ. 2020-07-30T23:08:57.09 3.0 undecidable manual Sn -0.31 0
MN.CLTB.HHZ. 2020-07-30T23:08:55.50 3.0 undecidable manual Sn -1.77 0
IV.LPEL.HHZ. 2020-07-30T23:08:48.05 3.0 positive manual Pn -0.27 0
IV.MCRV.HHZ. 2020-07-30T23:08:40.23 3.0 undecidable manual Pg 10.67 0
IV.CET2.HHZ. 2020-07-30T23:08:32.72 0.6 undecidable manual S 17 119.991 134 0.17 53
IV.PLAC.HHZ. 2020-07-30T23:08:27.12 0.3 undecidable manual S 94 78.2661 146 0.35 84
IV.AIO.HHE. 2020-07-30T23:08:26.35 0.6 undecidable manual S 205 64.0914 152 1.15 42
IV.SOI.EHN. 2020-07-30T23:08:24.97 0.6 undecidable manual S 136 64.9905 151 -0.31 57
MN.CEL.HHZ. 2020-07-30T23:08:23.13 0.3 undecidable manual S 130 40.5261 161 -0.03 95
IV.MPNC.HHZ. 2020-07-30T23:08:23.30 0.6 undecidable manual S 203 42.1245 161 0.02 64
IV.JOPP.HHZ. 2020-07-30T23:08:22.89 0.6 undecidable manual S 68 32.4453 165 0.23 63
IV.MSRU.HHZ. 2020-07-30T23:08:21.77 0.6 undecidable manual S 186 25.9518 168 -0.55 57
XK.SELL.HNE. 2020-07-30T23:08:14.48 0.1 undecidable manual P 60 108.6135 137 0.52 100
IV.CET2.HHZ. 2020-07-30T23:08:14.91 0.3 undecidable manual P 17 119.991 134 -0.05 83
IV.CAR1.HHE. 2020-07-30T23:08:12.93 0.6 undecidable manual P 34 102.12 139 -0.49 52
IV.PLAC.HHZ. 2020-07-30T23:08:11.66 0.3 negative manual P 94 78.2661 146 0.04 89
IV.AIO.HHE. 2020-07-30T23:08:11.27 0.3 undecidable manual P 205 64.0914 152 0.56 81
IV.NOV.HHZ. 2020-07-30T23:08:11.54 0.3 undecidable manual P 214 62.6928 152 0.91 70
IV.MTTG.HHE. 2020-07-30T23:08:10.09 0.3 undecidable manual P 166 56.499 155 -0.19 90
IV.SOI.EHN. 2020-07-30T23:08:10.32 0.3 undecidable manual P 136 64.9905 151 -0.44 84
MN.CEL.HHZ. 2020-07-30T23:08:09.20 0.3 undecidable manual P 130 40.5261 161 -0.33 90
IV.IVUG.HHE. 2020-07-30T23:08:09.58 0.6 undecidable manual P 257 49.3173 158 -0.34 59
IV.MPNC.HHZ. 2020-07-30T23:08:09.43 0.3 undecidable manual P 203 42.1245 161 -0.17 93
IV.JOPP.HHZ. 2020-07-30T23:08:09.07 0.3 undecidable manual P 68 32.4453 165 -0.17 95
IV.IVPL.HHE. 2020-07-30T23:08:09.77 0.3 undecidable manual P 255 50.4162 157 -0.2 92
IV.MSRU.HHZ. 2020-07-30T23:08:08.57 0.6 undecidable manual P 186 25.9518 168 -0.48 60
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.CEL.HHE. ML:1.4 0.0000148285805 0.3072 AML other m 2020-07-30T23:08:23.53
IV.MSRU.HHE. ML:1.8 0.000043249999999999994 1.7 AML other m 2020-07-30T23:08:23.00
MN.CEL.HHN. ML:1.7 0.00003025 0.64 AML other m 2020-07-30T23:08:23.88
IV.JOPP.HHN. ML:1.7 0.00002895 0.16 AML other m 2020-07-30T23:08:23.80
IV.PLAC.HNE. ML:1.8 0.000033480134999999994 0.6016 AML other m 2020-07-30T23:08:27.37
IV.MSRU.HHN. ML:1.7 0.00003335 1.06 AML other m 2020-07-30T23:08:28.03
IV.PLAC.HHN. ML:1.7 0.00002665 0.24 AML other m 2020-07-30T23:08:28.31
IV.PLAC.HHE. ML:1.7 0.000024449999999999998 0.28 AML other m 2020-07-30T23:08:28.72
IV.CET2.HHE. ML:1.7 0.000020799999999999997 0.48 AML other m 2020-07-30T23:08:34.22
IV.CET2.HHN. ML:2.1 0.00004705 0.46 AML other m 2020-07-30T23:08:34.86
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