Earthquake with magnitude of ML 1.5 on date 23-07-2021 and time 10:18:55 (Italy) in region 1 km SW Castrovillari (CS)

A magnitude ML 1.5 earthquake occured in region: 1 km SW Castrovillari (CS), on

  • 23-07-2021 08:18:55 (UTC)
  • 23-07-2021 10:18:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.809, 16.197 at 10 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Castrovillari CS 1 22240 22240
San Basile CS 3 1055 23295
Saracena CS 5 3828 27123
Morano Calabro CS 6 4576 31699
Frascineto CS 7 2154 33853
Lungro CS 10 2592 36445
Firmo CS 10 2115 38560
Civita CS 10 902 39462
Cassano all'Ionio CS 11 18495 57957
Acquaformosa CS 13 1106 59063
Altomonte CS 14 4488 63551
San Lorenzo Bellizzi CS 15 644 64195
Francavilla Marittima CS 16 2910 67105
San Donato di Ninea CS 17 1360 68465
Cerchiara di Calabria CS 17 2385 70850
San Lorenzo del Vallo CS 18 3394 74244
Spezzano Albanese CS 19 7028 81272

Municipalities with at least 50000 inhabitants

An earthquake occurred to
58 Km N of Cosenza (67546 inhabitants)
93 Km N of Lamezia Terme (70714 inhabitants)
98 Km SE of Potenza (67122 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 1.5 2021-07-23
08:18:55
39.809 16.1968 10 2021-07-23
08:24:22
Sala Sismica INGV-Roma 93098341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-23 08:18:55 ± 0.16
Latitude 39.8090 ± 0.0081
Longitude 16.1968 ± 0.0129
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93098341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1150
Semi-minor axis of confidence ellipse (meter) 820
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 243
Circular confidence region, given by single value of horizontal uncertainty (meter) 1150
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 157
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.45056
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 93098341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-23 08:24:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ATPI.EHZ. 2021-07-23T08:20:13.33 3.0 undecidable manual Pg 8.13 0
AC.VLO.HHZ. 2021-07-23T08:20:11.75 3.0 undecidable manual Sn 0.24 0
IV.APEC.HHZ. 2021-07-23T08:20:10.09 3.0 negative manual Pn 3.84 0
IV.ATCC.EHZ. 2021-07-23T08:20:10.75 3.0 positive manual Pg 9.88 0
IV.NARO.HHZ. 2021-07-23T08:20:04.50 3.0 undecidable manual Pn -1.35 0
IX.MNT3.EHZ.02 2021-07-23T08:19:37.79 3.0 undecidable manual S -2.11 0
IV.BSSO.HHZ. 2021-07-23T08:19:29.45 3.0 undecidable manual Pn -1.49 0
IV.ILOS.HHZ. 2021-07-23T08:19:24.74 3.0 positive manual Pn 0.14 0
IV.CET2.HHZ. 2021-07-23T08:19:08.00 0.3 undecidable manual S 214 0.3363 50 -0.11 72
IV.GRIS.EHZ. 2021-07-23T08:19:06.35 0.3 undecidable manual S 256 0.2725 50 0.13 72
IV.SIRI.HHZ. 2021-07-23T08:19:05.39 0.1 undecidable manual P 326 0.4506 50 0.69 80
IV.MMN.HHZ. 2021-07-23T08:19:03.10 0.6 undecidable manual S 297 0.1781 117 -0.03 50
IV.SCHR.EHZ. 2021-07-23T08:19:03.28 0.3 undecidable manual P 347 0.4011 50 -0.57 63
IV.CET2.HHZ. 2021-07-23T08:19:02.83 0.1 positive manual P 214 0.3363 50 0.08 96
MN.CUC.HHZ. 2021-07-23T08:19:02.78 0.1 undecidable manual P 302 0.3462 50 -0.13 95
IV.GRIS.EHZ. 2021-07-23T08:19:01.51 0.1 undecidable manual P 256 0.2725 50 -0.15 96
IV.TDS.HHZ. 2021-07-23T08:19:00.04 0.1 undecidable manual P 144 0.1844 116 0.05 100
IV.MMN.HHZ. 2021-07-23T08:18:59.84 0.1 positive manual P 297 0.1781 117 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MMN.HHN. ML:2.3 0.00161 1.78 AML other m 2021-07-23T08:19:03.92
IV.MMN.HHE. ML:2 0.000713 1.34 AML other m 2021-07-23T08:19:03.95
IV.TDS.HHE. ML:0.9 6.01E-5 1.34 AML other m 2021-07-23T08:19:05.86
IV.TDS.HHN. ML:0.9 6.155E-5 0.3 AML other m 2021-07-23T08:19:06.57
IV.GRIS.EHN. ML:1.4 0.00011275 0.92 AML other m 2021-07-23T08:19:07.75
IV.CET2.HHE. ML:1.7 0.0001825 0.42 AML other m 2021-07-23T08:19:08.44
IV.CET2.HHN. ML:1.9 0.000318 0.16 AML other m 2021-07-23T08:19:08.54
IV.GRIS.EHE. ML:1.3 0.0001015 0.36 AML other m 2021-07-23T08:19:10.39
MN.CUC.HHE. ML:1.6 0.0001545 1.68 AML other m 2021-07-23T08:19:12.89
IV.SCHR.EHE. ML:1.1 3.415E-5 0.56 AML other m 2021-07-23T08:19:15.33
MN.CUC.HHN. ML:1.5 0.0001165 1.54 AML other m 2021-07-23T08:19:15.15
IV.SCHR.EHN. ML:1 3.165E-5 0.46 AML other m 2021-07-23T08:19:15.06
IV.SIRI.HHE. ML:1.1 3.52E-5 1.22 AML other m 2021-07-23T08:19:19.05
IV.SIRI.HHN. ML:1.6 0.0001027 0.42 AML other m 2021-07-23T08:19:19.19
IV.SIRI.HNN. ML:1.6 0.0001009 0.58 AML other m 2021-07-23T08:19:20.64
IV.SIRI.HNE. ML:1.6 0.00011 0.28 AML other m 2021-07-23T08:19:21.76
AC.VLO.HHN. ML:3.8 0.0009355 0.66 AML other m 2021-07-23T08:20:47.80
AC.VLO.HHE. ML:3.7 0.0006575 0.06 AML other m 2021-07-23T08:20:47.86
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