Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 28-08-2021 and time 07:51:40 (Italy) in region 5 km E San Roberto (RC)

A magnitude ML 1.4 earthquake occured in region: 5 km E San Roberto (RC), on

  • 28-08-2021 05:51:40 (UTC)
  • 28-08-2021 07:51:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.2170, 15.7930 at 10 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
San Roberto RC 5 1750 1750
Santo Stefano in Aspromonte RC 5 1263 3013
Sant'Alessio in Aspromonte RC 6 343 3356
Laganadi RC 6 413 3769
Calanna RC 7 934 4703
Sant'Eufemia d'Aspromonte RC 8 4120 8823
Bagnara Calabra RC 8 10255 19078
Scilla RC 8 4964 24042
Fiumara RC 9 1018 25060
Sinopoli RC 9 2089 27149
San Procopio RC 11 534 27683
Delianuova RC 11 3352 31035
Campo Calabro RC 12 4536 35571
Melicuccà RC 12 930 36501
Scido RC 13 931 37432
Cosoleto RC 14 859 38291
Villa San Giovanni RC 14 13784 52075
Cardeto RC 15 1641 53716
Seminara RC 15 2811 56527
Santa Cristina d'Aspromonte RC 16 929 57456
Palmi RC 17 18930 76386
Reggio di Calabria RC 18 183035 259421
Oppido Mamertina RC 19 5332 264753
Varapodio RC 20 2160 266913

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km NE of Reggio di Calabria (183035 inhabitants)
21 Km E of Messina (238439 inhabitants)
87 Km NE of Acireale (52622 inhabitants)
96 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 1.4 2021-08-28
05:51:40		 38.2172 15.7933 10 2021-12-29
11:12:33		 Bollettino Sismico Italiano INGV 95974981
Reviewed
Rev100 		ML 1.5 2021-08-28
05:51:40		 38.2172 15.7933 10 2021-08-28
06:03:19		 Sala Sismica INGV-Roma 94734311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-28 05:51:40 ± 0.15
Latitude 38.2172 ± 0.0072
Longitude 15.7933 ± 0.0080
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95974981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 663
Semi-minor axis of confidence ellipse (meter) 653
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 310
Circular confidence region, given by single value of horizontal uncertainty (meter) 660.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.55668
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 94734311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-28 06:03:19

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 95974981
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-28 05:32:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2021-08-28T05:53:24.76 3.0 undecidable manual Pg 21.16 0
IV.RIBO.EHZ.01 2021-08-28T05:53:21.64 3.0 undecidable manual Pg 14.67 0
IV.PE3.EHZ. 2021-08-28T05:53:14.87 3.0 positive manual Pn 6.96 0
OT.OT05.EHZ. 2021-08-28T05:53:13.39 3.0 undecidable manual Sn 0.09 0
IV.MNTT.EHZ. 2021-08-28T05:53:01.29 3.0 negative manual Pn 5.65 0
IV.VIVA.HHZ. 2021-08-28T05:52:44.07 3.0 undecidable manual Pn 0.79 0
MN.CLTB.HHZ. 2021-08-28T05:52:44.21 3.0 undecidable manual Sn 3.4 0
IV.CRAC.EHZ. 2021-08-28T05:52:43.42 3.0 undecidable manual Sn -0.1 0
IV.MTGR.HHZ. 2021-08-28T05:52:20.00 3.0 undecidable manual Pn 1.73 0
IV.LADO.EHZ. 2021-08-28T05:52:09.87 3.0 undecidable manual P 4.9 0
IV.PLAC.HHZ. 2021-08-28T05:51:59.87 1.0 undecidable manual S 65 61.7937 50 -0.04 25
IV.MILZ.HHZ. 2021-08-28T05:51:56.52 0.6 undecidable manual S 277 49.3173 50 -0.07 50
IV.JOPP.HHZ. 2021-08-28T05:51:54.66 0.3 undecidable manual S 10 43.9227 50 -0.5 69
IV.MPNC.HHZ. 2021-08-28T05:51:54.04 0.3 undecidable manual S 259 39.2274 50 0.15 75
IV.PLAC.HHZ. 2021-08-28T05:51:52.46 1.0 undecidable manual P 65 61.7937 50 0.66 21
IV.SOI.EHZ. 2021-08-28T05:51:50.29 0.6 undecidable manual S 125 27.8499 50 -0.56 47
IV.MSRU.HHZ. 2021-08-28T05:51:49.83 0.6 undecidable manual S 282 25.3524 111 -0.33 50
IV.MTTG.HHZ. 2021-08-28T05:51:49.66 0.3 undecidable manual S 199 25.0527 112 -0.42 73
IV.JOPP.HHZ. 2021-08-28T05:51:49.41 0.3 positive manual P 10 43.9227 50 0.36 72
IV.MILZ.HHZ. 2021-08-28T05:51:49.80 1.0 undecidable manual P 277 49.3173 50 -0.08 25
IV.MPNC.HHZ. 2021-08-28T05:51:48.45 0.3 negative manual P 259 39.2274 50 0.13 76
IV.SOI.EHZ. 2021-08-28T05:51:46.82 0.3 positive manual P 125 27.8499 50 0.26 75
IV.MSRU.HHZ. 2021-08-28T05:51:46.23 0.3 positive manual P 282 25.3524 111 0.06 79
IV.MTTG.HHZ. 2021-08-28T05:51:46.41 0.1 negative manual P 199 25.0527 112 0.29 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MSRU.HHN. ML:1.6 0.000226 0.2 AML other m 2021-08-28T05:51:50.10
IV.MTTG.HHN. ML:1.2 0.00008767315149999999 0.1024 AML other m 2021-08-28T05:51:50.19
IV.SOI.EHN. ML:1.1 0.00007015302500000001 0.2208 AML other m 2021-08-28T05:51:50.54
IV.MSRU.HHE. ML:1.6 0.0002308535 0.2176 AML other m 2021-08-28T05:51:50.50
IV.SOI.EHE. ML:1.0 0.000049337105 0.3616 AML other m 2021-08-28T05:51:51.08
IV.MTTG.HHE. ML:1.0 0.00006710703 0.32 AML other m 2021-08-28T05:51:52.92
IV.MPNC.HHN. ML:1.8 0.000248 0.46 AML other m 2021-08-28T05:51:54.28
IV.MPNC.HHE. ML:1.7 0.00016406215000000003 0.4 AML other m 2021-08-28T05:51:54.23
IV.JOPP.HHN. ML:1.5 0.00010302022 0.48 AML other m 2021-08-28T05:51:58.48
IV.JOPP.HNN. ML:1.6 0.00010914021 0.48 AML other m 2021-08-28T05:51:58.47
IV.JOPP.HHE. ML:0.9 0.00002309664 0.48 AML other m 2021-08-28T05:51:58.88
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