Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 21-04-2023 and time 06:33:38 (Italy) in region Costa Marchigiana Maceratese (Macerata)

A magnitude ML 1.4 earthquake occured in region: Costa Marchigiana Maceratese (Macerata), on

  • 21-04-2023 04:33:38 (UTC)
  • 21-04-2023 06:33:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.3980, 13.8470 at 9 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
Civitanova Marche MC 14 41983 41983
Porto Recanati MC 15 12531 54514
Porto Sant'Elpidio FM 17 26152 80666
Potenza Picena MC 19 15936 96602
Montecosaro MC 19 7113 103715
Loreto AN 20 12814 116529

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SE of Ancona (100861 inhabitants)
83 Km N of Teramo (54892 inhabitants)
83 Km SE of Fano (60888 inhabitants)
94 Km SE of Pesaro (94582 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 2023-04-21
04:33:38		 43.398 13.8467 9 2024-03-01
17:18:20		 Bollettino Sismico Italiano INGV 125069941
Reviewed
Rev100 		ML 1.4 2023-04-21
04:33:38		 43.4003 13.8473 9 2023-04-21
04:49:09		 Sala Sismica INGV-Roma 116562711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-21 04:33:38 ± 0.25
Latitude 43.3980 ± 0.0072
Longitude 13.8467 ± 0.0161
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 125069941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1350
Semi-minor axis of confidence ellipse (meter) 685
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 74
Circular confidence region, given by single value of horizontal uncertainty (meter) 1350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 246
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.85346
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 116562711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-21 04:49:09

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 125069941
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-02-06 12:37:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CET2.HHZ. 2023-04-21T04:35:29.91 3.0 undecidable manual Sn -6.43 0
IV.PZUN.HNZ. 2023-04-21T04:35:15.61 3.0 undecidable manual Sg 4.94 0
IV.CLTA.HHZ. 2023-04-21T04:35:09.67 3.0 undecidable manual Pn -2.43 0
IV.ACER.HHZ. 2023-04-21T04:35:08.65 3.0 undecidable manual Sg -0.35 0
IV.ROVR.HNZ. 2023-04-21T04:34:31.05 3.0 undecidable manual Pg 8.12 0
SI.BOSI.HHZ. 2023-04-21T04:34:28.35 3.0 positive manual Pn -2.83 0
IV.CAFE.HNZ. 2023-04-21T04:34:24.69 3.0 undecidable manual Pg 1.73 0
IV.NRCA.HHZ. 2023-04-21T04:34:04.36 0.6 undecidable manual S 224 86.247 50 0.27 43
7F.SIB3.EHN. 2023-04-21T04:34:01.37 0.6 undecidable manual S 219 74.4699 50 0.43 43
IV.MML1.EHZ. 2023-04-21T04:34:01.49 0.6 undecidable manual S 246 77.4669 50 -0.24 44
IV.MMO1.EHZ. 2023-04-21T04:34:00.10 0.6 undecidable manual S 217 69.4749 50 0.48 43
IV.FDMO.HHZ. 2023-04-21T04:34:00.44 0.3 undecidable manual S 237 73.371 50 -0.2 68
IV.CSP1.EHZ. 2023-04-21T04:33:57.53 0.6 undecidable manual S 237 61.9935 50 -0.08 47
IV.MF5.EHZ. 2023-04-21T04:33:56.92 0.6 undecidable manual S 215 55.2003 50 1.11 34
IV.SMA1.EHZ. 2023-04-21T04:33:54.34 0.3 undecidable manual P 206 94.7385 50 -0.13 66
IV.CING.HHZ. 2023-04-21T04:33:54.77 0.6 undecidable manual S 268 52.6029 50 -0.33 46
IV.SSFR.HHZ. 2023-04-21T04:33:53.97 0.3 undecidable manual P 273 85.8474 50 0.87 53
IV.NRCA.HHZ. 2023-04-21T04:33:52.73 0.3 undecidable manual P 224 86.247 50 -0.43 63
IV.FDMO.HHZ. 2023-04-21T04:33:51.16 0.6 undecidable manual P 237 73.371 50 -0.01 47
IV.MML1.EHZ. 2023-04-21T04:33:51.08 0.3 undecidable manual P 246 77.4669 50 -0.72 58
7F.SIB3.EHN. 2023-04-21T04:33:51.12 0.3 undecidable manual P 219 74.4699 50 -0.23 67
IV.MMO1.EHZ. 2023-04-21T04:33:50.67 0.3 undecidable manual P 217 69.4749 50 0.09 70
IV.MF5.EHZ. 2023-04-21T04:33:48.31 0.3 undecidable manual P 215 55.2003 50 -0.07 72
IV.CING.HHZ. 2023-04-21T04:33:48.28 0.3 undecidable manual P 268 52.6029 50 0.31 69
IV.CSP1.EHZ. 2023-04-21T04:33:48.96 0.1 undecidable manual P 237 61.9935 50 -0.47 87
IV.CADA.HNZ. 2023-04-21T04:33:47.23 0.3 undecidable manual S 197 23.6541 112 0.16 75
IV.AOI.HHZ. 2023-04-21T04:33:47.84 0.3 undecidable manual S 311 25.9518 110 0.02 76
IV.CIMA.HNZ. 2023-04-21T04:33:45.32 0.3 undecidable manual S 234 17.5713 118 0.16 75
IV.PP3.EHZ. 2023-04-21T04:33:45.50 0.6 undecidable manual S 263 19.2696 116 -0.18 50
IV.AOI.HHZ. 2023-04-21T04:33:44.40 0.3 undecidable manual P 311 25.9518 110 0.63 66
IV.CADA.HNZ. 2023-04-21T04:33:43.31 0.3 undecidable manual P 197 23.6541 112 -0.03 77
IV.CIMA.HNZ. 2023-04-21T04:33:42.04 0.1 undecidable manual P 234 17.5713 118 -0.2 100
IV.PP3.EHZ. 2023-04-21T04:33:42.37 0.1 undecidable manual P 263 19.2696 116 -0.17 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PP3.EHE. ML:1.8 0.000443 1.04 AML other m 2023-04-21T04:33:45.15
IV.PP3.HNN. ML:1.6 0.00033699999999999995 0.74 AML other m 2023-04-21T04:33:46.32
IV.PP3.HNE. ML:1.8 0.000465 1.62 AML other m 2023-04-21T04:33:49.18
IV.PP3.EHN. ML:1.8 0.00045299999999999995 0.34 AML other m 2023-04-21T04:33:50.00
IV.CING.HHE. ML:0.9 0.00002005 0.56 AML other m 2023-04-21T04:33:57.43
IV.SSFR.HHN. ML:1.3 0.00002305 0.74 AML other m 2023-04-21T04:33:57.08
IV.CING.HHN. ML:0.8 0.00001605 0.68 AML other m 2023-04-21T04:33:58.24
IV.MML1.EHE. ML:1.0 0.000015875 0.64 AML other m 2023-04-21T04:34:02.30
IV.MML1.EHN. ML:1.0 0.00001645 0.16 AML other m 2023-04-21T04:34:04.70
IV.NRCA.HHE. ML:1.6 0.00005555 0.14 AML other m 2023-04-21T04:34:05.93
IV.NRCA.HHN. ML:1.6 0.0000431 0.14 AML other m 2023-04-21T04:34:06.92
IV.SSFR.HHE. ML:1.3 0.0000247 1.58 AML other m 2023-04-21T04:34:08.84
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