Earthquake with magnitude of ML 0.8 on date 31-07-2021 and time 20:25:33 (UTC) in region 7 km E Spezzano Piccolo (CS)

A magnitude ML 0.8 earthquake occured in region: 7 km E Spezzano Piccolo (CS), on

  • 31-07-2021 20:25:33 (UTC)
  • 31-07-2021 22:25:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.295, 16.422 at 14 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
Spezzano Piccolo CS 7 2079 2079
Serra Pedace CS 7 986 3065
Spezzano della Sila CS 7 4541 7606
Celico CS 7 2802 10408
Pedace CS 7 1907 12315
Casole Bruzio CS 8 2578 14893
Pietrafitta CS 8 1310 16203
Rovito CS 9 3158 19361
Trenta CS 9 2633 21994
Aprigliano CS 9 2890 24884
Lappano CS 10 941 25825
Piane Crati CS 11 1423 27248
San Pietro in Guarano CS 11 3663 30911
Figline Vegliaturo CS 11 1137 32048
Zumpano CS 11 2570 34618
Cellara CS 11 504 35122
Mangone CS 13 1891 37013
Castiglione Cosentino CS 13 2896 39909
Cosenza CS 14 67546 107455
Santo Stefano di Rogliano CS 14 1725 109180
Parenti CS 15 2188 111368
Rogliano CS 15 5637 117005
Paterno Calabro CS 16 1398 118403
Dipignano CS 16 4376 122779
Rose CS 16 4373 127152
Marzi CS 17 989 128141
Belsito CS 18 923 129064
Carolei CS 18 3330 132394
Carpanzano CS 19 255 132649
Colosimi CS 20 1247 133896
Castrolibero CS 20 9894 143790
Mendicino CS 20 9450 153240

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km E of Cosenza (67546 inhabitants)
37 Km N of Lamezia Terme (70714 inhabitants)
46 Km NW of Catanzaro (90612 inhabitants)
65 Km W of Crotone (62178 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 0.8 2021-07-31
20:25:33
39.2948 16.4218 14 2021-07-31
20:33:04
Sala Sismica INGV-Roma 93455521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-31 20:25:33 ± 0.06
Latitude 39.2948 ± 0.0045
Longitude 16.4218 ± 0.0035
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93455521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 406
Semi-minor axis of confidence ellipse (meter) 305
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 203
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.06475
Epicentral distance of station farthest from the epicenter (degree) 0.62503
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 93455521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-31 20:33:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GRIS.EHE. 2021-07-31T20:25:55.17 0.6 undecidable manual S 316 0.625 93 0.21 44
IV.SERS.HHZ. 2021-07-31T20:25:46.16 0.3 undecidable manual S 141 0.331 97 -0.13 71
IV.GRIS.EHE. 2021-07-31T20:25:46.06 0.6 undecidable manual P 316 0.625 93 -0.03 45
MN.TIP.HHZ. 2021-07-31T20:25:44.82 0.3 undecidable manual S 114 0.2851 99 -0.1 71
IV.CET2.HHZ. 2021-07-31T20:25:42.51 0.3 undecidable manual P 303 0.4299 95 -0.25 67
IV.SERS.HHZ. 2021-07-31T20:25:41.28 0.3 undecidable manual P 141 0.331 97 0.2 70
IV.CAR1.HHZ. 2021-07-31T20:25:41.44 0.3 undecidable manual S 256 0.1682 112 -0.13 73
MN.TIP.HHZ. 2021-07-31T20:25:40.36 0.3 undecidable manual P 114 0.2851 99 0.06 73
IV.CELI.HHZ. 2021-07-31T20:25:40.46 0.3 undecidable manual S 32 0.1268 122 -0.02 75
IV.SPS2.HHZ. 2021-07-31T20:25:39.17 0.3 undecidable manual S 267 0.0648 146 0.02 75
IV.CAR1.HHZ. 2021-07-31T20:25:38.48 0.3 undecidable manual P 256 0.1682 112 0.12 73
IV.SPS2.HHZ. 2021-07-31T20:25:37.04 0.3 undecidable manual P 267 0.0648 146 0.08 75
IV.CELI.HHZ. 2021-07-31T20:25:37.80 0.1 undecidable manual P 32 0.1268 122 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SPS2.HHN. ML:0.9 9.145E-5 0.22 AML other m 2021-07-31T20:25:39.33
IV.SPS2.HHE. ML:0.8 6.255E-5 0.98 AML other m 2021-07-31T20:25:39.14
IV.CELI.HHE. ML:0.4 2.16E-5 0.26 AML other m 2021-07-31T20:25:40.67
IV.CELI.HHN. ML:0.8 6.135E-5 0.28 AML other m 2021-07-31T20:25:40.84
IV.CAR1.HHN. ML:1 6.9231195E-5 0.2176 AML other m 2021-07-31T20:25:41.63
IV.CAR1.HHE. ML:0.9 6.08E-5 0.22 AML other m 2021-07-31T20:25:42.26
IV.SERS.HHE. ML:0.6 1.715E-5 1.58 AML other m 2021-07-31T20:25:47.97
IV.SERS.HHN. ML:0.6 1.55E-5 0.7 AML other m 2021-07-31T20:25:48.47
IV.CELI.HNE. ML:0.6 3.3221075E-5 1.2672 AML other m 2021-07-31T20:25:40.98
IV.CELI.HNN. ML:0.9 7.174E-5 0.2816 AML other m 2021-07-31T20:25:40.70
IV.CAR1.HNE. ML:1.1 8.5515925E-5 0.1792 AML other m 2021-07-31T20:25:42.12
IV.CAR1.HNN. ML:0.9 5.761193E-5 0.1664 AML other m 2021-07-31T20:25:41.95
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