Earthquake with magnitude of ML 1.4 on date 20-01-2021 and time 06:20:21 (Italy) in region 3 km E Castel San Lorenzo (SA)

A magnitude ML 1.4 earthquake occured in region: 3 km E Castel San Lorenzo (SA), on

  • 20-01-2021 05:20:21 (UTC)
  • 20-01-2021 06:20:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.41, 15.26 at 16 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
Castel San Lorenzo SA 3 2471 2471
Aquara SA 3 1545 4016
Bellosguardo SA 4 794 4810
Felitto SA 5 1283 6093
Roccadaspide SA 6 7209 13302
Roscigno SA 7 817 14119
Ottati SA 7 618 14737
Magliano Vetere SA 8 695 15432
Monteforte Cilento SA 8 564 15996
Sant'Angelo a Fasanella SA 8 635 16631
Castelcivita SA 9 1739 18370
Sacco SA 10 492 18862
Corleto Monforte SA 10 592 19454
Laurino SA 11 1548 21002
Stio SA 11 872 21874
Controne SA 12 875 22749
Valle dell'Angelo SA 12 248 22997
Campora SA 12 439 23436
Piaggine SA 13 1311 24747
Trentinara SA 13 1646 26393
Giungano SA 13 1280 27673
Cicerale SA 14 1220 28893
Gioi SA 14 1278 30171
Albanella SA 15 6513 36684
Orria SA 15 1089 37773
Capaccio Paestum SA 15 22810 60583
Petina SA 16 1159 61742
Perito SA 16 931 62673
Postiglione SA 16 2151 64824
Altavilla Silentina SA 17 7051 71875
Sicignano degli Alburni SA 17 3519 75394
San Rufo SA 17 1754 77148
Moio della Civitella SA 19 1827 78975
Prignano Cilento SA 19 1018 79993
Cannalonga SA 19 1063 81056
Salento SA 19 1977 83033
Ogliastro Cilento SA 20 2270 85303
San Pietro al Tanagro SA 20 1695 86998
Serre SA 20 3995 90993

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km SE of Battipaglia (50786 inhabitants)
52 Km SE of Salerno (135261 inhabitants)
52 Km SW of Potenza (67122 inhabitants)
57 Km SE of Cava de' Tirreni (53659 inhabitants)
68 Km SE of Avellino (54857 inhabitants)
73 Km SE of Scafati (50787 inhabitants)
73 Km E of Castellammare di Stabia (66466 inhabitants)
86 Km SE of Torre del Greco (86275 inhabitants)
89 Km SE of Ercolano (53709 inhabitants)
89 Km SE of Portici (55274 inhabitants)
89 Km SE of Benevento (60091 inhabitants)
96 Km SE of Acerra (59573 inhabitants)
98 Km SE of Napoli (974074 inhabitants)
98 Km SE of Afragola (65057 inhabitants)
99 Km SE of Casoria (77642 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
Reviewed
Rev100
ML 1.4 2021-01-20
05:20:21
40.41 15.26 16 2021-01-20
05:34:37
Sala Sismica INGV-Roma 86391081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-20 05:20:21 ± 0.22
Latitude 40.41 ± 0.01
Longitude 15.26 ± 0.01
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86391081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1030
Semi-minor axis of confidence ellipse (meter) 724
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 292
Circular confidence region, given by single value of horizontal uncertainty (meter) 1030
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 208
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) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.08184
Epicentral distance of station farthest from the epicenter (degree) 0.35433
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 13
Type of magnitude ML
Reference to an origin 86391081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-20 05:34:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SLCN.HHZ. 2021-01-20T05:20:32.85 0.3 undecidable manual S 95 0.2824 105 0.26 72
IV.BULG.HHZ. 2021-01-20T05:20:29.12 0.1 undecidable manual P 165 0.3471 101 0.09 98
IV.SLCN.HHZ. 2021-01-20T05:20:28.16 0.3 undecidable manual P 95 0.2824 105 0.22 72
IV.SGO.HHZ. 2021-01-20T05:20:28.80 0.3 undecidable manual S 13 0.1502 124 -0.18 75
IV.MGR.HHZ. 2021-01-20T05:20:28.63 0.1 undecidable manual P 141 0.3543 101 -0.52 90
IX.STN3.HHE.02 2021-01-20T05:20:28.33 0.3 undecidable manual P 68 0.3166 102 -0.19 73
IT.SLC1.HGE. 2021-01-20T05:20:27.50 0.3 undecidable manual P 94 0.2536 107 0.02 76
IV.CDRU.HHZ. 2021-01-20T05:20:27.26 0.3 undecidable manual S 23 0.0818 145 -0.25 74
IV.CMPR.HHZ. 2021-01-20T05:20:27.84 0.3 undecidable manual S 163 0.1007 138 -0.03 78
IX.TEGI.HNZ.01 2021-01-20T05:20:26.40 0.6 undecidable manual P 99 0.2104 112 -0.38 48
IV.SGO.HHZ. 2021-01-20T05:20:26.06 0.1 undecidable manual P 13 0.1502 124 0.2 100
IV.CDRU.HHZ. 2021-01-20T05:20:25.27 0.1 negative manual P 23 0.0818 145 0.25 100
IV.CMPR.HHZ. 2021-01-20T05:20:25.46 0.1 undecidable manual P 163 0.1007 138 0.24 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CDRU.HHN. ML:1.6 0.00033183885 0.1184 AML other m 2021-01-20T05:20:27.58
IV.CDRU.HHE. ML:1.5 0.00029941425 0.1184 AML other m 2021-01-20T05:20:28.29
IV.CMPR.HHN. ML:1.7 0.0004333807 0.1408 AML other m 2021-01-20T05:20:27.96
IV.CMPR.HHE. ML:1.8 0.000484 0.16 AML other m 2021-01-20T05:20:28.04
IV.SGO.HHN. ML:1.7 0.0003275 1.84 AML other m 2021-01-20T05:20:29.93
IV.SGO.HHE. ML:1.3 0.00014855765 0.2624 AML other m 2021-01-20T05:20:29.69
IV.SGO.HNE. ML:1.3 0.000135345295 0.2016 AML other m 2021-01-20T05:20:29.01
IV.SGO.HNN. ML:1.6 0.00030536235 0.1696 AML other m 2021-01-20T05:20:28.93
IV.MGR.HHE. ML:0.9 2.6820465E-5 0.24 AML other m 2021-01-20T05:20:35.13
IV.MGR.HHN. ML:1.2 4.867387E-5 0.3008 AML other m 2021-01-20T05:20:34.98
IV.BULG.HHE. ML:1 3.205316E-5 0.2016 AML other m 2021-01-20T05:20:37.48
IV.BULG.HHN. ML:1.3 6.7428735E-5 1.6992 AML other m 2021-01-20T05:20:28.42
IV.BULG.HNE. ML:1 3.0370395E-5 0.2016 AML other m 2021-01-20T05:20:37.58
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