Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 25-04-2021 and time 08:03:00 (UTC) in region 4 km W Poggio Picenze (AQ)

A magnitude ML 1.7 earthquake occured in region: 4 km W Poggio Picenze (AQ), on

  • 25-04-2021 08:03:00 (UTC)
  • 25-04-2021 10:03:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3270, 13.4990 at 20 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
Poggio Picenze AQ 4 1136 1136
Fossa AQ 4 721 1857
Sant'Eusanio Forconese AQ 5 394 2251
Ocre AQ 5 1167 3418
San Demetrio ne' Vestini AQ 7 1854 5272
Villa Sant'Angelo AQ 7 424 5696
Barisciano AQ 8 1828 7524
L'Aquila AQ 9 69753 77277
Rocca di Cambio AQ 10 533 77810
Fagnano Alto AQ 10 418 78228
Prata d'Ansidonia AQ 10 496 78724
Santo Stefano di Sessanio AQ 12 111 78835
Rocca di Mezzo AQ 13 1526 80361
San Pio delle Camere AQ 14 661 81022
Fontecchio AQ 14 369 81391
Lucoli AQ 14 1011 82402
Carapelle Calvisio AQ 16 87 82489
Castelvecchio Calvisio AQ 16 153 82642
Calascio AQ 16 137 82779
Caporciano AQ 17 230 83009
Tornimparte AQ 17 3187 86196
Tione degli Abruzzi AQ 18 310 86506
Castel del Monte AQ 19 413 86919

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km E of L'Aquila (69753 inhabitants)
41 Km SW of Teramo (54892 inhabitants)
55 Km W of Chieti (51815 inhabitants)
57 Km W of Montesilvano (53738 inhabitants)
61 Km W of Pescara (121014 inhabitants)
70 Km NE of Tivoli (56533 inhabitants)
73 Km NE of Guidonia Montecelio (88673 inhabitants)
75 Km E of Terni (111501 inhabitants)
93 Km NE of Velletri (53303 inhabitants)
96 Km SE of Foligno (57155 inhabitants)
97 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
Bulletin
Rev1000 		ML 1.7 2021-04-25
08:03:00		 42.3273 13.499 20 2021-07-12
16:55:08		 Bollettino Sismico Italiano INGV 89488011
Reviewed
Rev100 		ML 1.7 2021-04-25
08:03:00		 42.329 13.5062 22 2021-04-25
08:12:08		 Sala Sismica INGV-Roma 89459931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-25 08:03:00 ± 0.06
Latitude 42.3273 ± 0.0027
Longitude 13.4990 ± 0.0036
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89488011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 335
Semi-minor axis of confidence ellipse (meter) 123
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 232
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 52
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.07464
Epicentral distance of station farthest from the epicenter (degree) 0.57916
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 40
Type of magnitude ML
Reference to an origin 89459931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-25 08:12:08

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 42
Type of magnitude ML
Reference to an origin 89488011
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-26 09:19:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LPEL.HHZ. 2021-04-25T08:03:20.57 0.1 undecidable manual S 119 64.2912 100 0 90
IV.INTR.HHZ. 2021-04-25T08:03:16.22 0.6 undecidable manual S 136 48.4182 104 -0.19 45
IV.PTQR.HHZ. 2021-04-25T08:03:13.11 0.6 undecidable manual S 193 34.8429 111 0.16 47
IV.T1299.HNN. 2021-04-25T08:03:13.80 0.3 undecidable manual S 333 38.4282 108 -0.04 71
IV.SMA1.EHZ. 2021-04-25T08:03:13.51 0.6 undecidable manual S 338 36.2415 110 0.22 45
IV.FIAM.HHZ. 2021-04-25T08:03:12.64 0.6 undecidable manual S 258 32.0457 113 0.4 44
IV.GAVE.EHZ. 2021-04-25T08:03:12.00 0.3 undecidable manual P 310 63.8916 100 -0.14 66
IV.RM33.EHZ. 2021-04-25T08:03:12.02 0.3 undecidable manual S 311 30.8469 114 0.07 71
IV.TERO.HHZ. 2021-04-25T08:03:12.68 0.6 undecidable manual S 15 33.8439 111 -0.03 48
IV.LPEL.HHZ. 2021-04-25T08:03:11.84 0.3 undecidable manual P 119 64.2912 100 -0.35 63
IV.T0110.HHZ. 2021-04-25T08:03:11.12 0.6 undecidable manual S 115 25.2525 120 0.5 44
IV.CERT.HHZ. 2021-04-25T08:03:11.55 0.3 undecidable manual P 226 59.7957 101 0.04 69
IV.VVLD.HHZ. 2021-04-25T08:03:10.07 0.3 undecidable manual P 169 51.8037 103 -0.23 66
IV.INTR.HHZ. 2021-04-25T08:03:09.66 0.1 undecidable manual P 136 48.4182 104 -0.13 90
IV.GIGS.HHN. 2021-04-25T08:03:08.41 0.3 undecidable manual S 23 15.1737 136 -0.09 74
IV.T1299.HNN. 2021-04-25T08:03:08.30 0.1 positive manual P 333 38.4282 108 -0.01 95
IV.RM33.EHZ. 2021-04-25T08:03:07.20 0.1 undecidable manual P 311 30.8469 114 -0.02 96
IV.FAGN.HHZ. 2021-04-25T08:03:07.63 0.6 undecidable manual S 134 9.7791 150 0.01 50
IV.TERO.HHZ. 2021-04-25T08:03:07.62 0.1 positive manual P 15 33.8439 111 -0.04 95
IV.VCEL.EHZ. 2021-04-25T08:03:07.25 0.3 undecidable manual P 75 28.9488 116 0.29 69
IV.PTQR.HHZ. 2021-04-25T08:03:07.86 0.1 negative manual P 193 34.8429 111 0.06 95
IV.SMA1.EHZ. 2021-04-25T08:03:07.93 0.1 positive manual P 338 36.2415 110 -0.06 95
MN.AQU.HNN. 2021-04-25T08:03:07.11 0.1 undecidable manual S 291 8.2806 154 -0.33 95
IV.FIAM.HHZ. 2021-04-25T08:03:07.44 0.1 undecidable manual P 258 32.0457 113 0.05 96
IV.T0110.HHZ. 2021-04-25T08:03:06.61 0.1 positive manual P 115 25.2525 120 0.16 95
IV.GIGS.HHN. 2021-04-25T08:03:05.29 0.1 positive manual P 23 15.1737 136 0.06 98
MN.AQU.HNN. 2021-04-25T08:03:04.61 0.1 negative manual P 291 8.2806 154 0 100
IV.FAGN.HHZ. 2021-04-25T08:03:04.73 0.1 undecidable manual P 134 9.7791 150 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FAGN.HHN. ML:2.2 0.00113079925 0.2368 AML other m 2021-04-25T08:03:08.14
IV.FAGN.HHE. ML:2.2 0.0013804803 0.2432 AML other m 2021-04-25T08:03:08.66
IV.T0110.HHN. ML:2.4 0.0010786428 0.1344 AML other m 2021-04-25T08:03:11.65
IV.TERO.HHE. ML:1.5 0.00010677607 0.16 AML other m 2021-04-25T08:03:12.87
IV.T0110.HHE. ML:2.2 0.0007019999999999999 0.18 AML other m 2021-04-25T08:03:13.35
IV.RM33.EHN. ML:1.5 0.00013662844999999998 0.2752 AML other m 2021-04-25T08:03:13.59
IV.RM33.HNN. ML:1.6 0.00015693835 0.2176 AML other m 2021-04-25T08:03:13.46
IV.PTQR.HHN. ML:1.4 0.00010144987 0.2176 AML other m 2021-04-25T08:03:13.82
IV.RM33.HNE. ML:1.5 0.0001412917 0.4096 AML other m 2021-04-25T08:03:13.64
IV.PTQR.HHE. ML:1.4 0.000088700375 0.1216 AML other m 2021-04-25T08:03:14.08
IV.FIAM.HHE. ML:1.3 0.00006839999999999998 0.42 AML other m 2021-04-25T08:03:14.53
IV.FIAM.HHN. ML:1.4 0.000099931505 0.224 AML other m 2021-04-25T08:03:14.57
IV.GAVE.HNE. ML:1.9 0.00015285825 1.1936 AML other m 2021-04-25T08:03:14.23
IV.TERO.HHN. ML:1.5 0.00012639430000000002 0.2368 AML other m 2021-04-25T08:03:15.62
IV.VCEL.EHN. ML:2.0 0.00041549999999999996 0.42 AML other m 2021-04-25T08:03:15.67
IV.RM33.EHE. ML:1.5 0.0001235 1.32 AML other m 2021-04-25T08:03:15.84
IV.FIAM.HNN. ML:1.6 0.00017168489 0.4352 AML other m 2021-04-25T08:03:15.90
IV.TERO.HNE. ML:1.6 0.0001438538 0.3136 AML other m 2021-04-25T08:03:16.36
IV.VCEL.EHE. ML:2.0 0.00043100000000000007 0.48 AML other m 2021-04-25T08:03:17.00
IV.FIAM.HNE. ML:2.6 0.0015726132500000001 1.4656 AML other m 2021-04-25T08:03:17.77
IV.INTR.HHN. ML:1.9 0.000191 0.22 AML other m 2021-04-25T08:03:17.82
IV.INTR.HNN. ML:1.8 0.0001783632 0.2304 AML other m 2021-04-25T08:03:17.82
IV.SMA1.EHE. ML:1.6 0.00015 1.72 AML other m 2021-04-25T08:03:18.89
IV.TERO.HNN. ML:1.8 0.00020762125000000001 0.3904 AML other m 2021-04-25T08:03:18.36
IV.INTR.HHE. ML:1.6 0.0001067 0.72 AML other m 2021-04-25T08:03:18.40
IV.SMA1.EHN. ML:1.6 0.00013283665 1.5776 AML other m 2021-04-25T08:03:19.81
IV.VVLD.HNE. ML:1.6 0.000093092535 1.5712 AML other m 2021-04-25T08:03:20.18
IV.LPEL.HHE. ML:1.9 0.0001386891 0.1024 AML other m 2021-04-25T08:03:21.11
IV.INTR.HNE. ML:1.7 0.00014089685 0.5504 AML other m 2021-04-25T08:03:21.77
IV.LPEL.HHN. ML:1.8 0.0001255 1.28 AML other m 2021-04-25T08:03:21.31
IV.LPEL.HNN. ML:1.9 0.0001536525 0.2176 AML other m 2021-04-25T08:03:22.20
IV.CERT.HNE. ML:2.0 0.00018175574999999998 0.4352 AML other m 2021-04-25T08:03:22.35
IV.CERT.HHE. ML:1.6 0.00007835000000000001 0.4 AML other m 2021-04-25T08:03:22.78
IV.VVLD.HHN. ML:1.4 0.0000534 0.6 AML other m 2021-04-25T08:03:23.30
IV.GAVE.EHN. ML:1.5 0.00005835 0.84 AML other m 2021-04-25T08:03:23.54
IV.LPEL.HNE. ML:1.9 0.000142623105 0.1792 AML other m 2021-04-25T08:03:23.30
IV.CERT.HNN. ML:2.0 0.000182785005 0.7296 AML other m 2021-04-25T08:03:23.27
IV.CERT.HHN. ML:1.6 0.00007855000000000001 0.74 AML other m 2021-04-25T08:03:23.34
IV.VVLD.HHE. ML:1.3 0.000045350000000000005 0.44 AML other m 2021-04-25T08:03:26.25
IV.GAVE.EHE. ML:1.6 0.00006445 0.24 AML other m 2021-04-25T08:03:29.56
IV.GAVE.HNN. ML:2.0 0.00020236684999999999 1.1296 AML other m 2021-04-25T08:03:32.06
IV.VVLD.HNN. ML:1.6 0.000104792105 1.4944 AML other m 2021-04-25T08:03:32.96
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