Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 09-04-2024 and time 22:26:00 (Italy) in region 4 km NE Posta (RI)

A magnitude ML 0.5 earthquake occured in region: 4 km NE Posta (RI), on

  • 09-04-2024 20:26:00 (UTC)
  • 09-04-2024 22:26:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5540, 13.1240 at 13 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
Posta RI 4 694 694
Borbona RI 5 617 1311
Cittareale RI 8 482 1793
Montereale AQ 11 2581 4374
Micigliano RI 13 127 4501
Leonessa RI 13 2435 6936
Cagnano Amiterno AQ 13 1369 8305
Capitignano AQ 15 665 8970
Antrodoco RI 16 2588 11558
Amatrice RI 16 2657 14215
Borgo Velino RI 17 972 15187
Barete AQ 17 737 15924
Monteleone di Spoleto PG 18 599 16523
Accumoli RI 19 667 17190
Castel Sant'Angelo RI 19 1308 18498
Pizzoli AQ 19 4326 22824

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NW of L'Aquila (69753 inhabitants)
39 Km E of Terni (111501 inhabitants)
49 Km W of Teramo (54892 inhabitants)
56 Km SE of Foligno (57155 inhabitants)
70 Km NE of Guidonia Montecelio (88673 inhabitants)
71 Km NE of Tivoli (56533 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
85 Km E of Viterbo (67173 inhabitants)
86 Km SE of Perugia (166134 inhabitants)
89 Km W of Chieti (51815 inhabitants)
90 Km W of Pescara (121014 inhabitants)
90 Km NE of Roma (2864731 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 0.5 2024-04-09
20:26:00		 42.5543 13.1235 13 2024-04-09
20:34:53		 Sala Sismica INGV-Roma 126604721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-04-09 20:26:00 ± 0.12
Latitude 42.5543 ± 0.0054
Longitude 13.1235 ± 0.0085
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 126604721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 596
Semi-minor axis of confidence ellipse (meter) 573
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 27
Circular confidence region, given by single value of horizontal uncertainty (meter) 600.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 127
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.07824
Epicentral distance of station farthest from the epicenter (degree) 0.35973
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 126604721
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-04-09 20:34:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HNZ. 2024-04-09T20:26:13.25 0.6 undecidable manual S 79 39.9267 94 -0.53 43
IV.FIAM.HNZ. 2024-04-09T20:26:11.46 0.6 undecidable manual S 181 31.746 96 -0.14 47
IV.NRCA.HHZ. 2024-04-09T20:26:11.22 0.6 undecidable manual S 359 30.9468 96 -0.18 48
IV.SMA1.EHZ. 2024-04-09T20:26:08.41 0.6 undecidable manual S 64 19.2696 105 0.1 49
IV.TERO.HNZ. 2024-04-09T20:26:08.38 0.1 undecidable manual P 79 39.9267 94 0.15 94
IV.NRCA.HHZ. 2024-04-09T20:26:06.81 0.1 undecidable manual P 359 30.9468 96 -0.04 98
IV.FIAM.HNZ. 2024-04-09T20:26:06.99 1.0 undecidable manual P 181 31.746 96 0.02 24
IV.SMA1.EHZ. 2024-04-09T20:26:05.29 0.1 undecidable manual P 64 19.2696 105 0.22 96
IV.LNSS.HHZ. 2024-04-09T20:26:05.70 0.6 undecidable manual S 308 8.6802 137 -0.16 50
IV.RM33.EHZ. 2024-04-09T20:26:05.67 0.6 undecidable manual S 124 8.9799 135 -0.25 49
IV.LNSS.HHZ. 2024-04-09T20:26:03.75 0.1 undecidable manual P 308 8.6802 137 0.09 100
IV.RM33.EHZ. 2024-04-09T20:26:03.78 0.3 negative manual P 124 8.9799 135 0.09 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:0.4 0.00003204999999999999 0.86 AML other m 2024-04-09T20:26:06.13
IV.LNSS.HHE. ML:0.7 0.00005745 0.76 AML other m 2024-04-09T20:26:06.51
IV.RM33.EHE. ML:0.4 0.000026316125000000002 0.1 AML other m 2024-04-09T20:26:06.03
IV.RM33.EHN. ML:0.5 0.00003276985 0.1 AML other m 2024-04-09T20:26:05.75
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