Earthquake with magnitude of ML 1.1 on date 09-04-2021 and time 22:33:57 (UTC) in region 1 km S Roccafluvione (AP)

A magnitude ML 1.1 earthquake occured in region: 1 km S Roccafluvione (AP), on

  • 09-04-2021 22:33:57 (UTC)
  • 10-04-2021 00:33:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8490, 13.4750 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Roccafluvione AP 1 2010 2010
Venarotta AP 4 2066 4076
Palmiano AP 6 196 4272
Ascoli Piceno AP 8 49407 53679
Acquasanta Terme AP 10 2916 56595
Montegallo AP 12 523 57118
Valle Castellana TE 13 977 58095
Force AP 13 1354 59449
Comunanza AP 13 3166 62615
Folignano AP 13 9241 71856
Montemonaco AP 13 604 72460
Rotella AP 14 906 73366
Montefortino FM 15 1178 74544
Montefalcone Appennino FM 16 424 74968
Castignano AP 16 2796 77764
Montedinove AP 16 488 78252
Appignano del Tronto AP 17 1785 80037
Arquata del Tronto AP 17 1178 81215
Maltignano AP 18 2401 83616
Smerillo FM 18 365 83981
Amandola FM 18 3629 87610
Civitella del Tronto TE 18 5116 92726
Rocca Santa Maria TE 19 537 93263
Montalto delle Marche AP 19 2122 95385
Santa Vittoria in Matenano FM 19 1330 96715
Montelparo FM 20 778 97493
Castel di Lama AP 20 8634 106127
Sant'Egidio alla Vibrata TE 20 9811 115938

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NW of Teramo (54892 inhabitants)
56 Km N of L'Aquila (69753 inhabitants)
64 Km E of Foligno (57155 inhabitants)
67 Km NW of Montesilvano (53738 inhabitants)
74 Km NW of Pescara (121014 inhabitants)
75 Km E of Terni (111501 inhabitants)
79 Km NW of Chieti (51815 inhabitants)
86 Km S of Ancona (100861 inhabitants)
93 Km E of Perugia (166134 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 1.1 2021-04-09
22:33:57
42.8493 13.4748 13 2021-04-09
22:42:25
Sala Sismica INGV-Roma 88951461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-09 22:33:57 ± 0.05
Latitude 42.8493 ± 0.0018
Longitude 13.4748 ± 0.0025
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 88951461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 250
Semi-minor axis of confidence ellipse (meter) 11
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 321
Circular confidence region, given by single value of horizontal uncertainty (meter) 250.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 60
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.08
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32466
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 88951461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-09 22:42:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CPGN.EHZ. 2021-04-09T22:34:21.99 3.0 undecidable manual P 1.83 0
IV.CAFI.HNZ. 2021-04-09T22:34:19.48 3.0 undecidable manual P 0.24 0
IV.EL6.EHZ. 2021-04-09T22:34:07.73 3.0 undecidable manual P -0.67 0
IV.MC2.EHZ. 2021-04-09T22:34:06.36 1.0 undecidable manual S 287 24.2535 98 0.18 24
IV.OFFI.HHZ. 2021-04-09T22:34:04.90 1.0 undecidable manual S 61 19.5693 103 -0.06 25
IV.TRTR.HHE. 2021-04-09T22:34:04.10 1.0 undecidable manual P 97 36.0417 94 -0.1 24
IV.NRCA.HHZ. 2021-04-09T22:34:03.15 0.6 undecidable manual P 267 29.3484 95 -0.04 50
IV.T1299.EHZ. 2021-04-09T22:34:03.10 0.6 undecidable manual P 213 28.5492 96 0.04 50
IV.MMO1.EHZ. 2021-04-09T22:34:03.34 0.3 undecidable manual S 295 13.2756 118 -0.02 77
IV.MTRA.HNZ. 2021-04-09T22:34:03.15 0.3 undecidable manual S 212 12.0768 122 0.05 76
IV.MF5.EHZ. 2021-04-09T22:34:03.85 0.6 undecidable manual S 355 15.3735 111 -0.04 51
IV.CSP1.EHZ. 2021-04-09T22:34:03.80 0.6 undecidable manual P 321 34.743 94 -0.2 47
IV.TERO.HHZ. 2021-04-09T22:34:02.68 1.0 undecidable manual P 157 27.2505 96 -0.18 24
IV.SMA1.EHZ. 2021-04-09T22:34:02.76 0.6 undecidable manual P 205 26.8509 96 -0.03 50
IV.MNTT.EHZ. 2021-04-09T22:34:02.82 0.6 negative manual P 23 25.5522 97 0.22 48
IV.MC2.EHZ. 2021-04-09T22:34:02.44 0.6 negative manual P 287 24.2535 98 0.04 50
IV.MF5.EHZ. 2021-04-09T22:34:01.00 0.6 positive manual P 355 15.3735 111 -0.08 50
IV.OFFI.HHZ. 2021-04-09T22:34:01.79 0.1 positive manual P 61 19.5693 103 0.1 100
IV.MMO1.EHZ. 2021-04-09T22:34:00.64 1.0 undecidable manual P 295 13.2756 118 -0.13 25
IV.MTRA.HNZ. 2021-04-09T22:34:00.60 0.6 undecidable manual P 212 12.0768 122 -0.01 51
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TERO.HHN. ML:0.8 0.000027794680000000002 0.1024 AML other m 2021-04-09T22:34:07.68
IV.TERO.HHE. ML:0.8 0.000034964795 0.1664 AML other m 2021-04-09T22:34:07.68
IV.NRCA.HHE. ML:1.3 0.00010300000000000001 0.14 AML other m 2021-04-09T22:34:07.96
IV.NRCA.HHN. ML:1.2 0.00006855 0.1 AML other m 2021-04-09T22:34:07.90
IV.MF5.EHE. ML:0.8 0.00005453552 0.4352 AML other m 2021-04-09T22:34:06.88
IV.MF5.EHN. ML:0.9 0.00006578585000000001 0.384 AML other m 2021-04-09T22:34:04.35
IV.OFFI.HHE. ML:1.3 0.0001321585 1.0496 AML other m 2021-04-09T22:34:06.04
IV.OFFI.HHN. ML:1.3 0.0001514139 0.9344 AML other m 2021-04-09T22:34:05.31
IV.CSP1.EHE. ML:1.0 0.000038557005000000004 0.9984 AML other m 2021-04-09T22:34:07.96
IV.CSP1.EHN. ML:1.0 0.00003397118 0.8576 AML other m 2021-04-09T22:34:21.32
IV.EL6.EHE. ML:1.2 0.000029017316500000003 0.32 AML other m 2021-04-09T22:34:17.96
IV.EL6.EHN. ML:1.4 0.000047235855 0.2432 AML other m 2021-04-09T22:34:32.81
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