Earthquake with magnitude of ML 1.3 on date 23-09-2021 and time 05:04:48 (UTC) in region 3 km NE Colliano (SA)

A magnitude ML 1.3 earthquake occured in region: 3 km NE Colliano (SA), on

  • 23-09-2021 05:04:48 (UTC)
  • 23-09-2021 07:04:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.743, 15.314 at 0 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
Colliano SA 3 3638 3638
Valva SA 4 1643 5281
Laviano SA 5 1438 6719
Santomenna SA 7 443 7162
Castelnuovo di Conza SA 9 619 7781
Oliveto Citra SA 9 3802 11583
Calabritto AV 9 2391 13974
Senerchia AV 9 842 14816
Palomonte SA 9 3985 18801
Caposele AV 11 3483 22284
Castelgrande PZ 11 943 23227
Contursi Terme SA 12 3394 26621
San Gregorio Magno SA 12 4286 30907
Sant'Andrea di Conza AV 12 1539 32446
Pescopagano PZ 13 1910 34356
Conza della Campania AV 13 1373 35729
Teora AV 13 1537 37266
Buccino SA 13 5047 42313
Muro Lucano PZ 14 5497 47810
Romagnano al Monte SA 16 368 48178
Ricigliano SA 17 1144 49322
Cairano AV 18 326 49648
Lioni AV 18 6201 55849
Bella PZ 19 5171 61020
Campagna SA 19 16703 77723
Rapone PZ 19 990 78713
Balvano PZ 20 1830 80543

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km E of Battipaglia (50786 inhabitants)
43 Km W of Potenza (67122 inhabitants)
47 Km E of Salerno (135261 inhabitants)
48 Km E of Avellino (54857 inhabitants)
51 Km E of Cava de' Tirreni (53659 inhabitants)
62 Km SE of Benevento (60091 inhabitants)
66 Km E of Scafati (50787 inhabitants)
70 Km E of Castellammare di Stabia (66466 inhabitants)
76 Km SW of Cerignola (58396 inhabitants)
80 Km E of Torre del Greco (86275 inhabitants)
81 Km E of Portici (55274 inhabitants)
82 Km E of Ercolano (53709 inhabitants)
82 Km E of Acerra (59573 inhabitants)
82 Km S of Foggia (151991 inhabitants)
87 Km E of Afragola (65057 inhabitants)
88 Km E of Casoria (77642 inhabitants)
90 Km E of Napoli (974074 inhabitants)
90 Km E of Caserta (76326 inhabitants)
96 Km E of Giugliano in Campania (122974 inhabitants)
96 Km E of Marano di Napoli (59874 inhabitants)
97 Km E of Aversa (53047 inhabitants)
99 Km SW of Andria (100440 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 1.3 2021-09-23
05:04:48
40.743 15.3138 0 2021-09-23
05:13:31
Sala Sismica INGV-Roma 95770401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-23 05:04:48 ± 0.14
Latitude 40.7430 ± 0.0063
Longitude 15.3138 ± 0.0107
Depth (km) 0 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95770401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 900
Semi-minor axis of confidence ellipse (meter) 710
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 67
Circular confidence region, given by single value of horizontal uncertainty (meter) 900
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 8
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) 0.19875
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 95770401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-23 05:13:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SGO.HHN. 2021-09-23T05:04:55.76 0.6 undecidable manual S 182 0.1826 91 0.43 47
IV.MRLC.HHZ. 2021-09-23T05:04:53.88 0.6 undecidable manual S 84 0.1331 91 0.45 47
IV.SNAL.HHZ. 2021-09-23T05:04:52.64 0.3 undecidable manual P 337 0.1988 91 -0.08 75
IV.SGO.HHN. 2021-09-23T05:04:52.27 0.6 undecidable manual P 182 0.1826 91 -0.09 50
IV.MRLC.HHZ. 2021-09-23T05:04:51.04 0.3 undecidable manual P 84 0.1331 91 -0.22 74
IV.MCRV.HHZ. 2021-09-23T05:04:51.06 0.1 undecidable manual P 290 0.1169 91 0.16 100
IX.COL3.HHZ.02 2021-09-23T05:04:50.56 0.6 undecidable manual S 167 0.0576 93 0.05 52
IX.SNR3.EHZ.02 2021-09-23T05:04:50.72 3.0 positive manual P 0.01 0
IX.COL3.HHZ.02 2021-09-23T05:04:49.22 0.1 positive manual P 167 0.0576 93 -0.35 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IX.SNR3.HNE.01 ML:1.6 0.000769 0.24 AML other m 2021-09-23T05:04:55.05
IX.SNR3.EHE.02 ML:1.5 0.000697 0.24 AML other m 2021-09-23T05:04:55.05
IV.MRLC.HHE. ML:0.8 8.616225E-5 0.3584 AML other m 2021-09-23T05:04:54.91
IX.SNR3.HNN.01 ML:1.7 0.000985 0.22 AML other m 2021-09-23T05:04:55.04
IX.SNR3.EHN.02 ML:1.7 0.0008875 0.2 AML other m 2021-09-23T05:04:55.05
IV.MCRV.HHN. ML:1.1 0.0001785 0.16 AML other m 2021-09-23T05:04:56.23
IV.MCRV.HHE. ML:0.8 8.24E-5 0.26 AML other m 2021-09-23T05:04:56.38
IV.MRLC.HHN. ML:1 0.000113 0.6 AML other m 2021-09-23T05:04:56.25
IX.COL3.HHE.02 ML:0 0.001773443 0.144 AML other m 2021-09-23T05:04:51.29
IX.COL3.HHN.02 ML:0 0.001733749 0.88 AML other m 2021-09-23T05:04:50.85
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