Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 21-04-2024 and time 11:22:05 (Italy) in region 2 km W Montegallo (AP)

A magnitude ML 1.2 earthquake occured in region: 2 km W Montegallo (AP), on

  • 21-04-2024 09:22:05 (UTC)
  • 21-04-2024 11:22:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8460, 13.3070 at 19 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.

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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
Montegallo AP 2 523 523
Montemonaco AP 6 604 1127
Arquata del Tronto AP 8 1178 2305
Montefortino FM 11 1178 3483
Acquasanta Terme AP 12 2916 6399
Castelsantangelo sul Nera MC 14 281 6680
Palmiano AP 14 196 6876
Roccafluvione AP 14 2010 8886
Comunanza AP 15 3166 12052
Amandola FM 16 3629 15681
Venarotta AP 16 2066 17747
Accumoli RI 17 667 18414
Ussita MC 18 444 18858
Bolognola MC 18 142 19000
Norcia PG 18 4957 23957
Valle Castellana TE 20 977 24934
Force AP 20 1354 26288

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km NW of Teramo (54892 inhabitants)
51 Km E of Foligno (57155 inhabitants)
55 Km N of L'Aquila (69753 inhabitants)
63 Km NE of Terni (111501 inhabitants)
78 Km W of Montesilvano (53738 inhabitants)
80 Km E of Perugia (166134 inhabitants)
85 Km NW of Pescara (121014 inhabitants)
88 Km S of Ancona (100861 inhabitants)
89 Km NW of Chieti (51815 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
Reviewed
Rev100 		ML 1.2 2024-04-21
09:22:05		 42.8458 13.307 19 2024-04-21
09:31:40		 Sala Sismica INGV-Roma 126933021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-04-21 09:22:05 ± 0.1
Latitude 42.8458 ± 0.0045
Longitude 13.3070 ± 0.0074
Depth (km) 19 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 126933021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 478
Semi-minor axis of confidence ellipse (meter) 439
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 250
Circular confidence region, given by single value of horizontal uncertainty (meter) 480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.43887
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 126933021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-04-21 09:31:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIGS.HHZ. 2024-04-21T09:22:20.92 0.3 undecidable manual S 153 48.7179 103 -0.05 68
IV.MML1.HNE. 2024-04-21T09:22:18.88 0.3 undecidable manual S 318 40.2264 106 0.08 69
IV.LNSS.HNN. 2024-04-21T09:22:17.96 0.1 undecidable manual S 219 34.6431 109 0.6 84
IT.MTCL.HGN. 2024-04-21T09:22:16.07 0.1 undecidable manual S 303 29.9478 113 -0.12 95
IV.CSP1.EHZ. 2024-04-21T09:22:15.99 0.3 undecidable manual S 343 28.5492 114 0.14 70
IV.FDMO.HHZ. 2024-04-21T09:22:15.38 0.3 undecidable manual S 320 27.6501 115 -0.26 69
IV.SMA1.EHZ. 2024-04-21T09:22:14.63 0.3 undecidable manual S 174 23.9538 120 -0.15 70
IV.GIGS.HHZ. 2024-04-21T09:22:14.14 0.1 undecidable manual P 153 48.7179 103 -0.2 88
IV.MF5.EHZ. 2024-04-21T09:22:14.75 0.1 undecidable manual S 38 20.0688 126 0.87 76
IV.MML1.HNE. 2024-04-21T09:22:12.93 0.3 undecidable manual P 318 40.2264 106 -0.16 69
IV.MTRA.HNZ. 2024-04-21T09:22:12.24 0.1 undecidable manual S 144 12.2766 142 -0.14 95
IV.NRCA.HHZ. 2024-04-21T09:22:12.87 0.3 undecidable manual S 265 15.7731 134 -0.13 72
IV.CAMP.HHZ. 2024-04-21T09:22:12.52 3.0 undecidable manual P 0
IV.MC2.EHE. 2024-04-21T09:22:12.52 0.1 undecidable manual S 307 12.0768 142 0.18 95
IV.LNSS.HNN. 2024-04-21T09:22:12.27 0.1 undecidable manual P 219 34.6431 109 0.01 95
7F.SIB1.EHZ. 2024-04-21T09:22:11.61 0.3 undecidable manual S 331 6.1938 159 0.04 75
IV.MMO1.HNZ. 2024-04-21T09:22:11.39 0.1 undecidable manual S 15 6.1938 159 -0.18 96
IV.FDMO.HHZ. 2024-04-21T09:22:11.09 0.1 undecidable manual P 320 27.6501 115 -0.18 94
7F.SIB3.EHN. 2024-04-21T09:22:11.11 0.1 undecidable manual S 317 4.3956 165 -0.32 94
IV.CSP1.EHZ. 2024-04-21T09:22:11.31 0.1 undecidable manual P 343 28.5492 114 -0.08 95
7F.SIB2.EHN. 2024-04-21T09:22:11.11 0.3 undecidable manual S 357 4.995 163 -0.36 70
IV.GUMA.HHZ. 2024-04-21T09:22:11.05 3.0 positive manual P 0.13 0
IT.MTCL.HGN. 2024-04-21T09:22:11.41 0.1 undecidable manual P 303 29.9478 113 -0.17 93
IV.MF5.EHZ. 2024-04-21T09:22:10.73 0.1 undecidable manual P 38 20.0688 126 0.48 88
IV.SMA1.EHZ. 2024-04-21T09:22:10.86 0.3 undecidable manual P 174 23.9538 120 0.09 72
IV.MC2.EHE. 2024-04-21T09:22:09.48 0.1 undecidable manual P 307 12.0768 142 0.12 97
7F.SIB1.EHZ. 2024-04-21T09:22:09.02 0.1 undecidable manual P 331 6.1938 159 0.1 98
IV.MTRA.HNZ. 2024-04-21T09:22:09.38 0.1 undecidable manual P 144 12.2766 142 0 98
IV.NRCA.HHZ. 2024-04-21T09:22:09.83 0.3 undecidable manual P 265 15.7731 134 0.09 73
IV.MMO1.HNZ. 2024-04-21T09:22:08.93 0.1 undecidable manual P 15 6.1938 159 0.01 100
7F.SIB3.EHN. 2024-04-21T09:22:08.76 0.1 undecidable manual P 317 4.3956 165 -0.07 99
7F.SIB2.EHN. 2024-04-21T09:22:08.74 0.1 undecidable manual P 357 4.995 163 -0.12 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.0 0.00007217938 0.08 AML other m 2024-04-21T09:22:12.99
IV.NRCA.HHN. ML:1.2 0.00009987603999999999 0.08 AML other m 2024-04-21T09:22:12.90
IV.MTRA.EHE. ML:1.2 0.000112564065 0.2 AML other m 2024-04-21T09:22:12.51
IV.MTRA.EHN. ML:1.1 0.00009141142999999999 0.16 AML other m 2024-04-21T09:22:13.24
IV.SMA1.EHE. ML:1.1 0.000060684580000000004 0.16 AML other m 2024-04-21T09:22:15.42
IV.SMA1.EHN. ML:1.1 0.000065137925 0.1 AML other m 2024-04-21T09:22:15.24
IV.FDMO.HHE. ML:0.9 0.000033807215000000005 0.14 AML other m 2024-04-21T09:22:16.08
IV.FDMO.HHN. ML:1.0 0.000049088865 0.16 AML other m 2024-04-21T09:22:15.71
IV.CSP1.EHE. ML:1.4 0.000110417015 1.04 AML other m 2024-04-21T09:22:16.56
IV.CSP1.EHN. ML:1.5 0.0001283881 1.78 AML other m 2024-04-21T09:22:16.93
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