Earthquake with magnitude of ML 1.7 on date 22-08-2021 and time 05:08:58 (Italy) in region Tirreno Meridionale (MARE)

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

  • 22-08-2021 03:08:58 (UTC)
  • 22-08-2021 05:08:58 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.012, 15.578 at 76 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
64 Km W of Lamezia Terme (70714 inhabitants)
66 Km SW of Cosenza (67546 inhabitants)
89 Km W of Catanzaro (90612 inhabitants)
91 Km N of Messina (238439 inhabitants)
100 Km N of Reggio di Calabria (183035 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 1.7 2021-08-22
03:08:58
39.0117 15.5785 77 2021-08-22
03:22:57
Sala Sismica INGV-Roma 94483121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-22 03:08:58 ± 0.27
Latitude 39.0117 ± 0.0108
Longitude 15.5785 ± 0.0255
Depth (km) 77 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94483121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1916
Semi-minor axis of confidence ellipse (meter) 1474
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 115
Circular confidence region, given by single value of horizontal uncertainty (meter) 1920
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 170
Number of associated phases, regardless of their use for origin computation 27
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
Epicentral distance of station farthest from the epicenter (degree) 0.99825
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 94483121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-22 03:22:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SENA.HHZ. 2021-08-22T03:10:21.73 3.0 undecidable manual Pg 9.97 0
IV.VAGA.HHZ. 2021-08-22T03:10:08.42 3.0 undecidable manual Sn -5.93 0
IX.NSC3.EHZ.02 2021-08-22T03:09:59.34 3.0 undecidable manual Sg 3.04 0
IV.SERS.HHZ. 2021-08-22T03:09:30.16 0.6 undecidable manual S 88 0.8624 121 1.71 23
IV.MPNC.HHE. 2021-08-22T03:09:28.72 0.6 undecidable manual S 192 0.8822 121 -0.15 47
IV.GRIS.EHZ. 2021-08-22T03:09:26.38 0.3 undecidable manual S 16 0.759 125 0 73
IV.SICLA.EHE. 2021-08-22T03:09:26.20 0.6 undecidable manual S 172 0.7626 125 -0.26 47
IV.MSRU.HHZ. 2021-08-22T03:09:25.99 0.6 undecidable manual S 184 0.7491 126 -0.21 47
IV.SPS2.HHZ. 2021-08-22T03:09:24.14 0.6 undecidable manual S 64 0.652 130 -0.23 48
IV.CET2.HHZ. 2021-08-22T03:09:23.42 0.3 undecidable manual S 29 0.5927 133 0.11 75
IV.JOPP.HHZ. 2021-08-22T03:09:21.65 0.3 undecidable manual S 149 0.4703 141 0.34 72
IV.CAR1.HHZ. 2021-08-22T03:09:21.88 0.6 undecidable manual S 64 0.5468 136 -0.65 44
IV.GIZZ.HHZ. 2021-08-22T03:09:21.27 0.6 undecidable manual S 94 0.4901 139 -0.34 49
IV.PLLN.EHZ. 2021-08-22T03:09:20.87 3.0 positive manual Pn -1.86 0
IV.PIPA.HHZ. 2021-08-22T03:09:18.23 3.0 positive manual Pn -0.06 0
MN.CUC.HHZ. 2021-08-22T03:09:17.99 0.6 undecidable manual P 10 0.9982 117 0.73 39
IV.SERS.HHZ. 2021-08-22T03:09:15.31 0.3 undecidable manual P 88 0.8624 121 -0.31 67
IV.MILZ.HHE. 2021-08-22T03:09:15.16 0.3 undecidable manual P 200 0.7878 124 0.41 67
IV.MSRU.HHZ. 2021-08-22T03:09:14.40 0.3 undecidable manual P 184 0.7491 126 0.08 72
IV.MPNC.HHE. 2021-08-22T03:09:14.56 0.6 undecidable manual P 192 0.8822 121 -1.3 30
IV.GRIS.EHZ. 2021-08-22T03:09:14.55 0.3 undecidable manual P 16 0.759 125 0.13 72
IV.SICLA.EHE. 2021-08-22T03:09:14.41 0.3 undecidable manual P 172 0.7626 125 -0.05 73
IV.SPS2.HHZ. 2021-08-22T03:09:13.18 0.3 undecidable manual P 64 0.652 130 -0.08 74
IV.CET2.HHZ. 2021-08-22T03:09:12.79 0.3 undecidable manual P 29 0.5927 133 0.14 74
IV.CAR1.HHZ. 2021-08-22T03:09:12.09 0.1 undecidable manual P 64 0.5468 136 -0.1 100
IV.GIZZ.HHZ. 2021-08-22T03:09:11.33 0.3 undecidable manual P 94 0.4901 139 -0.33 73
IV.JOPP.HHZ. 2021-08-22T03:09:11.76 0.1 undecidable manual P 149 0.4703 141 0.27 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.JOPP.HHE. ML:1.5 3.331687E-5 1.2192 AML other m 2021-08-22T03:09:22.35
IV.JOPP.HNN. ML:2 0.000123 0.14 AML other m 2021-08-22T03:09:22.11
IV.JOPP.HHN. ML:2.1 0.000132 0.14 AML other m 2021-08-22T03:09:22.04
IV.JOPP.HNE. ML:2.1 0.00012819505 0.12 AML other m 2021-08-22T03:09:22.13
IV.CET2.HHE. ML:1.8 7.13E-5 0.16 AML other m 2021-08-22T03:09:24.00
IV.CET2.HHN. ML:2.1 0.00011537905 0.24 AML other m 2021-08-22T03:09:24.08
IV.SPS2.HHE. ML:1 1.189244E-5 2.0592 AML other m 2021-08-22T03:09:26.07
IV.CAR1.HHE. ML:1.5 2.88E-5 0.74 AML other m 2021-08-22T03:09:26.60
IV.CAR1.HHN. ML:1.6 4.394476E-5 0.92 AML other m 2021-08-22T03:09:23.85
IV.SPS2.HHN. ML:1.3 1.8872545E-5 0.32 AML other m 2021-08-22T03:09:24.83
IV.SERS.HHN. ML:1.7 3.735E-5 0.42 AML other m 2021-08-22T03:09:32.56
IV.SERS.HHE. ML:1.4 1.97E-5 0.56 AML other m 2021-08-22T03:09:32.63
IV.CAR1.HNE. ML:1.8 6.4696465E-5 0.68 AML other m 2021-08-22T03:09:20.73
IV.CAR1.HNN. ML:1.9 8.7059905E-5 2.3616 AML other m 2021-08-22T03:09:22.64
IV.MSRU.HHE. ML:1.8 5.4419825E-5 2.9008 AML other m 2021-08-22T03:09:25.71
IV.MSRU.HHN. ML:1.7 4.46202E-5 0.3808 AML other m 2021-08-22T03:09:27.17
IV.GRIS.EHE. ML:1.6 3.3061345E-5 1.4592 AML other m 2021-08-22T03:09:28.84
IV.GRIS.EHN. ML:1.5 2.491102E-5 0.1408 AML other m 2021-08-22T03:09:27.50
IV.SERS.HNE. ML:1.8 5.0385705E-5 1.0208 AML other m 2021-08-22T03:09:33.44
IV.SERS.HNN. ML:1.5 2.5091507E-5 0.36 AML other m 2021-08-22T03:09:32.47
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