INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.9 on date 07-08-2018 and time 00:42:35 (Italy) in region Tirreno Meridionale (MARE)

A magnitude ML 1.9 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 06-08-2018 22:42:35 (UTC)
  • 07-08-2018 00:42:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.54, 15.55 at 105 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km N of Messina (238439 inhabitants)
49 Km N of Reggio di Calabria (183035 inhabitants)
82 Km SW of Lamezia Terme (70714 inhabitants)
99 Km W of Catanzaro (90612 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
Rev 100 ML 1.9 2018-08-06
22:42:35
38.54 15.55 105 2018-08-06
22:49:11
Sala Sismica INGV-Roma 59460691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-06 22:42:35 ± 0.27
Latitude 38.54 ± 0.01
Longitude 15.55 ± 0.02
Depth (km) 105 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 59460691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1827
Semi-minor axis of confidence ellipse (meter) 1171
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 128
Circular confidence region, given by single value of horizontal uncertainty (meter) 1830
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 154
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.03512
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.5
Num. used stations 16
Type of magnitude ML
Reference to an origin 59460691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-06 22:49:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
AC.VLO.HHZ. 2018-08-06T22:44:26.80 3.0 undecidable manual Sg 13.82 0
IV.SMA1.EHZ. 2018-08-06T22:44:25.10 3.0 undecidable manual Sn -5.8 0
GU.GRAM.HHZ. 2018-08-06T22:44:19.60 3.0 positive manual Pn -0.8 0
IV.SAMA.HHZ. 2018-08-06T22:44:14.47 3.0 undecidable manual Sn -5.22 0
IV.ARVD.HHZ. 2018-08-06T22:43:54.28 3.0 undecidable manual Pn 0.06 0
IV.SMA1.EHZ. 2018-08-06T22:43:52.86 3.0 undecidable manual Pg 11.12 0
IV.SAMA.HHZ. 2018-08-06T22:43:36.05 3.0 negative manual Pn 0.61 0
IV.PANTE.HHZ. 2018-08-06T22:43:35.14 3.0 undecidable manual Pg 6.4 0
IV.VIVA.HHZ. 2018-08-06T22:43:31.68 3.0 positive manual Pn -2.36 0
IV.MTMR.EHZ. 2018-08-06T22:43:21.59 3.0 undecidable manual Pg 7.26 0
IV.MILZ.HHZ. 2018-08-06T22:43:03.35 0.3 undecidable manual S 223 0.3687 157 0.23 77
IV.MSRU.HHZ. 2018-08-06T22:43:02.43 0.3 undecidable manual S 187 0.2788 162 0.07 81
IV.JOPP.HHZ. 2018-08-06T22:43:02.02 0.3 undecidable manual S 76 0.2689 163 -0.26 79
IV.CET2.HHZ. 2018-08-06T22:42:57.45 0.1 undecidable manual P 17 1.0351 128 0.03 94
IV.SERS.HHZ. 2018-08-06T22:42:57.39 0.3 undecidable manual P 60 1.0135 128 0.19 68
IV.CAR1.HHZ. 2018-08-06T22:42:55.65 0.3 negative manual P 36 0.8768 133 -0.11 71
IV.PLAC.HHZ. 2018-08-06T22:42:54.14 0.1 negative manual P 97 0.6988 140 0.08 100
IV.SOI.EHZ. 2018-08-06T22:42:53.03 1.0 negative manual P 140 0.6115 144 -0.27 24
MN.CEL.HHZ. 2018-08-06T22:42:51.79 0.6 negative manual P 136 0.3876 155 0.05 53
IV.MILZ.HHZ. 2018-08-06T22:42:51.35 0.3 negative manual P 223 0.3687 157 -0.28 77
IV.JOPP.HHZ. 2018-08-06T22:42:51.49 0.6 undecidable manual P 76 0.2689 163 0.35 51
IV.MSRU.HHZ. 2018-08-06T22:42:50.88 0.6 positive manual P 187 0.2788 162 -0.31 52
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CET2.HHN. ML:1.9 3.96E-5 0.42 AML other m 2018-08-06T22:42:58.36
IV.MSRU.HHN. ML:2 7.99E-5 1.62 AML other m 2018-08-06T22:43:05.09
IV.MSRU.HHE. ML:2.1 0.0001049 0.88 AML other m 2018-08-06T22:43:05.79
IV.JOPP.HHE. ML:1.8 5.215E-5 0.14 AML other m 2018-08-06T22:43:05.76
IV.JOPP.HHN. ML:1.9 6.985E-5 1.16 AML other m 2018-08-06T22:43:05.30
MN.CEL.HHN. ML:1.8 5.69E-5 0.72 AML other m 2018-08-06T22:43:06.01
MN.CEL.HHE. ML:1.8 5.585E-5 0.32 AML other m 2018-08-06T22:43:07.28
IV.SOI.EHN. ML:1.8 3.78E-5 1.38 AML other m 2018-08-06T22:43:08.99
IV.SOI.EHE. ML:1.6 2.96E-5 0.24 AML other m 2018-08-06T22:43:09.16
IV.PLAC.HHN. ML:1.7 3.69E-5 1.58 AML other m 2018-08-06T22:43:09.88
IV.PLAC.HHE. ML:1.7 2.89E-5 0.34 AML other m 2018-08-06T22:43:11.41
IV.CET2.HHE. ML:1.6 1.88E-5 1.34 AML other m 2018-08-06T22:43:15.98
IV.SAMA.HHE. ML:4.1 0.000532 0.06 AML other m 2018-08-06T22:43:45.57
IV.SAMA.HHN. ML:4.1 0.000534 0.7 AML other m 2018-08-06T22:43:45.28
IV.VIVA.HHN. ML:3.9 0.0003215 0.42 AML other m 2018-08-06T22:43:51.06
IV.VIVA.HHE. ML:3.6 0.0001975 0.32 AML other m 2018-08-06T22:44:00.10
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