Earthquake with magnitude of ML 1.7 on date 20-01-2021 and time 03:58:08 (Italy) in region 2 km SE Castel San Lorenzo (SA)

A magnitude ML 1.7 earthquake occured in region: 2 km SE Castel San Lorenzo (SA), on

  • 20-01-2021 02:58:08 (UTC)
  • 20-01-2021 03:58:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.4, 15.25 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
Castel San Lorenzo SA 2 2471 2471
Felitto SA 4 1283 3754
Aquara SA 4 1545 5299
Roccadaspide SA 5 7209 12508
Bellosguardo SA 6 794 13302
Monteforte Cilento SA 6 564 13866
Magliano Vetere SA 6 695 14561
Roscigno SA 8 817 15378
Ottati SA 9 618 15996
Castelcivita SA 10 1739 17735
Sant'Angelo a Fasanella SA 10 635 18370
Stio SA 10 872 19242
Laurino SA 11 1548 20790
Sacco SA 11 492 21282
Campora SA 12 439 21721
Corleto Monforte SA 12 592 22313
Giungano SA 12 1280 23593
Trentinara SA 12 1646 25239
Valle dell'Angelo SA 12 248 25487
Controne SA 12 875 26362
Cicerale SA 12 1220 27582
Piaggine SA 13 1311 28893
Gioi SA 13 1278 30171
Orria SA 13 1089 31260
Albanella SA 14 6513 37773
Capaccio Paestum SA 14 22810 60583
Perito SA 15 931 61514
Altavilla Silentina SA 17 7051 68565
Postiglione SA 17 2151 70716
Prignano Cilento SA 17 1018 71734
Petina SA 18 1159 72893
Moio della Civitella SA 18 1827 74720
Sicignano degli Alburni SA 18 3519 78239
Salento SA 18 1977 80216
Ogliastro Cilento SA 18 2270 82486
Cannalonga SA 18 1063 83549
San Rufo SA 18 1754 85303
Torchiara SA 19 1871 87174
Rutino SA 19 842 88016
Vallo della Lucania SA 20 8531 96547
Lustra SA 20 1075 97622

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km SE of Battipaglia (50786 inhabitants)
51 Km SE of Salerno (135261 inhabitants)
54 Km SW of Potenza (67122 inhabitants)
57 Km SE of Cava de' Tirreni (53659 inhabitants)
68 Km SE of Avellino (54857 inhabitants)
72 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)
90 Km SE of Benevento (60091 inhabitants)
95 Km SE of Acerra (59573 inhabitants)
97 Km SE of Napoli (974074 inhabitants)
98 Km SE of Afragola (65057 inhabitants)
98 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 1.7 2021-01-20
02:58:08
40.41 15.25 14 2021-01-20
03:05:45
Sala Sismica INGV-Roma 86388211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-20 02:58:08 ± 0.35
Latitude 40.41 ± 0.01
Longitude 15.25 ± 0.03
Depth (km) 14 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86388211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1920
Semi-minor axis of confidence ellipse (meter) 1069
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 274
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) 213
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.52161
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.4
Num. used stations 16
Type of magnitude ML
Reference to an origin 86388211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-20 03:05:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SIRI.HHZ. 2021-01-20T02:58:26.90 0.3 undecidable manual S 115 0.5216 93 0.48 64
IX.CSG3.HNZ.01 2021-01-20T02:58:25.58 3.0 undecidable manual S 0.25 0
IV.BULG.HNN. 2021-01-20T02:58:21.82 0.3 undecidable manual S 163 0.3408 96 0.73 62
IV.SLCN.HHZ. 2021-01-20T02:58:20.00 0.3 undecidable manual S 93 0.2923 98 0.34 68
IV.MGR.HHZ. 2021-01-20T02:58:20.70 0.3 undecidable manual S 139 0.3543 96 -0.78 56
IV.SIRI.HHZ. 2021-01-20T02:58:18.60 0.1 undecidable manual P 115 0.5216 93 -0.24 88
IV.MRLC.HHZ. 2021-01-20T02:58:17.16 0.1 undecidable manual P 27 0.3957 95 0.47 85
IV.BULG.HNN. 2021-01-20T02:58:15.85 0.1 undecidable manual P 163 0.3408 96 0.08 96
IV.MGR.HHZ. 2021-01-20T02:58:15.38 0.1 undecidable manual P 139 0.3543 96 -0.61 81
IX.STN3.HHZ.02 2021-01-20T02:58:15.30 0.1 undecidable manual P 68 0.3301 96 -0.28 91
IV.SGO.HHZ. 2021-01-20T02:58:15.50 0.3 undecidable manual S 16 0.161 112 -0.38 70
IV.CDRU.HHZ. 2021-01-20T02:58:14.10 0.1 undecidable manual S 27 0.0944 133 -0.09 100
IV.SLCN.HHZ. 2021-01-20T02:58:14.77 0.1 undecidable manual P 93 0.2923 98 -0.17 94
IV.CMPR.HHZ. 2021-01-20T02:58:14.00 0.1 undecidable manual S 155 0.0962 132 -0.23 94
IV.SGO.HHZ. 2021-01-20T02:58:12.76 0.1 undecidable manual P 16 0.161 112 0 99
IV.CMPR.HHZ. 2021-01-20T02:58:12.22 0.1 undecidable manual P 155 0.0962 132 0.41 93
IV.CDRU.HHZ. 2021-01-20T02:58:11.96 0.1 undecidable manual P 27 0.0944 133 0.18 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CDRU.HHN. ML:1.8 0.0006035 0.78 AML other m 2021-01-20T02:58:14.31
IV.CDRU.HHE. ML:1.9 0.000766 0.8 AML other m 2021-01-20T02:58:14.01
IV.CMPR.HHN. ML:1.9 0.0008115 0.28 AML other m 2021-01-20T02:58:14.70
IV.CMPR.HHE. ML:2 0.00106 0.16 AML other m 2021-01-20T02:58:14.85
IV.SGO.HHN. ML:1.8 0.0005115 0.42 AML other m 2021-01-20T02:58:15.64
IV.SGO.HNN. ML:1.8 0.0005275 0.42 AML other m 2021-01-20T02:58:15.64
IV.SGO.HHE. ML:1.6 0.0002735 0.66 AML other m 2021-01-20T02:58:15.90
IV.SGO.HNE. ML:1.6 0.000292 0.66 AML other m 2021-01-20T02:58:16.72
IV.MGR.HHN. ML:1.5 0.0001031 0.16 AML other m 2021-01-20T02:58:21.71
IX.STN3.HHE.02 ML:3.2 0.00621 1.34 AML other m 2021-01-20T02:58:22.70
IX.STN3.HHN.02 ML:3.2 0.00556 1.5 AML other m 2021-01-20T02:58:22.04
IV.SLCN.HHE. ML:1.7 0.000201 0.34 AML other m 2021-01-20T02:58:22.68
IV.SLCN.HHN. ML:1.3 9.16E-5 1.58 AML other m 2021-01-20T02:58:24.10
IV.MGR.HHE. ML:1.2 4.95E-5 0.54 AML other m 2021-01-20T02:58:26.46
IV.SIRI.HHE. ML:1.2 3.59E-5 0.42 AML other m 2021-01-20T02:58:28.47
IV.SIRI.HHN. ML:1.3 4.295E-5 0.8 AML other m 2021-01-20T02:58:30.16
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